thuyet minh goi thau 1 son hoa (hcbbtt)

D n Nng cao hiu qu nng lng khu vc nng thn tnh Ph Yn.

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GII THIU BIN CH N THIT K BN V THI CNG

D N NNG CAO HIU QU NNG LNG KHU VC NNG THN TNH PH YN Gi thu: TK-CPC-KFW-PY-W04 CP IN HUYN SN HO - TNH PH YN

H s thit k bn v thi cng Cng trnh: Cp in huyn Sn Ha - tnh Ph Yn. Gi thu TK/CPC-KFW-PY-W04 thuc D n Nng cao hiu qu nng lng khu vc nng thn tnh Ph Yn c bin ch thnh 3 tp:

Tp 1: Thuyt minh. Tp 2: Cc bn v. Tp 3: D ton.

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Ni dung tp 1THUYT MINH= = = = = = = = = =

Ni dung tp 1 gm 3 phn: Phn I Thuyt minh 1.1 1.2 1.3 2.1 2.2 3.1 3.2 4.1 4.2 4.3 4.4 5.1 5.2 5.3 5.4 5.5 5.6 5.7 Phn II Phn III Ph lc Cn c v c s lp thit k bn v thi cng Tiu chun p dng Quy m cng trnh V tr a l v iu kin t nhin Tnh hnh li in hin trng Ngun cp in - im u ni Gii php cp in iu kin tnh ton ng dy trung p Trm bin p ph ti ng dy h p C s lp t chc xy dng Cng trng Cng tc vn chuyn Bin php t chc thi cng xy lp Tin thi cng Bin php an ton thi cng Mt s lu Chng 1: Quy m cng trnh.

Chng 2: c im cng trnh

Chng 3: Gii php cp in

Chng 4: Cc Gii php cng ngh chnh

Chng 5: T chc xy dng

Tng k - Lit k - Cng dy.

PHN 1: THUYT MINHTrang

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Chng 1 QUY M CNG TRNH1.1 Cn c v c s lp thit k bn v thi cng:H s thit k bn v thi cng Cng trnh: Cp in huyn Sn Ha - tnh Ph Yn. Gi thu TK/CPC-KFW-PY-W04 thuc D n Nng cao hiu qu nng lng khu vc nng thn tnh Ph Yn c lp da trn c s: - Quyt nh s 2302/Q-EVN CPC ngy 13 thng 7 nm 2010 ca Tng Cng ty in lc min Trung v vic ph duyt D n u t xy dng cng trnh: D n Nng cao hiu qu nng lng khu vc nng thn tnh Ph Yn(vay vn KFW). - Hp ng kinh t c k kt gia Ban Qun l d n in nng thn vi Cng ty TNHH Thanh Nin. - Lut in lc s 28/2004/QH11 ngy 01/7/2005. - Ngh nh s 12/2009/N-CP ngy 10/02/2009 ca Chnh ph v qun l d n u t xy dng cng trnh. - Ngh nh s 209/2004/N-CP v qun l cht lng cng trnh xy dng. - Ngh nh 106/2005/N-CP v hng dn chi tit mt s iu ca Lut in lc v bo v an ton li in cao p do Chnh Ph ban hnh ngy 17/08/2005.

1.2 Tiu chun p dng:- Quy phm trang b in: 11TCN-18, 19, 20, 21-2006 ca B Cng Nghip. - Quyt nh s 44/2006/Q-BCN ngy 8/12/2006 ca B cng nghip v vic ban hnh Quy nh k thut in nng thn. - TCXDVN 356: 2005 kt cu b tng ct thp. Tiu chun thit k. - TCXDVN 338: 2005 kt cu thp. Tiu chun thit k. - TCVN 2737 - 1995 Ti trng v tc ng. Tiu chun thit k. - S liu bo co kt qu kho st k thut cng trnh " D n Nng cao hiu qu nng lng khu vc nng thn tnh Ph Yn " do Cng ty TNHH Thanh Nin lp.

1.3 Quy m cng trnh:Nng cp v m rng li in cp in cho cc h dn thuc huyn Sn Ho tnh Ph Yn. * ng dy trung p xy dng mi l 6.066mt, trong : + Tuyn ng dy trung p i kt hp 3 pha 3 dy : 6.066 mt * ng dy h p vi tng chiu di tuyn 20.621 mt, trong : ** Phn Xy dng mi : 10.748 m + Tuyn ng dy h p 3 pha 4 dy xy dng mi i c lp: 5.459 m + Tuyn ng dy h p 3 pha 4 dy xy dng mi i kt hp: 1.963 m + Tuyn ng dy h p 1 pha 2 dy xy dng mi i c lp: 2.936 mTrang

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+ Tuyn ng dy h p 1 pha 2 dy xy dng mi i kt hp: 390 m ** Phn Ci to : 9.873 m + Tuyn ng dy h p ci to 1 phn: 9,087km + Tuyn ng dy h p ci to hon ton: 0,786km * Phn trm bin p: ** Phn Xy dng mi : - Xy dng mi 10 trm bin p cp in cho huyn Sn Ho bao gm : + Trm bin p 3 pha 100kVA-22/0.4kV : 03 trm. + Trm bin p 3 pha 50kVA-22/0.4kV : 06 trm. + Trm bin p 2 pha 50kVA-22/2x0.23kV : 01 trm. (Tn dng li MBA 2 pha 50kVA-22/2x0.23kV thu hi ca TBA Dc i M ci to nng cp) ** Phn Ci to : + Nng cng sut 01 TBA 2 pha 50kVA-22/2x0.23kV thnh 3 pha 50kVA-22/0.4kV. * Phn tho d thu hi: ** ng dy h p: + ng dy 3 pha 4 dy: + ng dy 1 pha 2 dy:

7.275,5 m 5.433 m; 1.842,5 m

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BNG SO SNH KHI LNG THIT K SO VI D N DUYTSTT Tn gi K hiu n v Khi lng DA duyt Khi lng thit k Tng (+) Gim (-)

A1 2

Phn ng dy trung thng dy trung p 3 pha 3 dy xy dng mi ng dy trung p 3 pha 3 dy XDM kt hp HT mt mt 50kVA22/0.4kV 100kVA22/0.4kV 50kVA22/0.4kV 100kVA22/0.4kV 50kVA22/0.4kV 50kVA -22/0.4kV 50kVA22/0.4kV 50kVA22/0.4kV 100kVA22/0.4kV 50kVA22/0.4kV 50kVA22/2x0.23kV 1600 6000 0 6066 -1600 66

B1 2 3 4 5 6 7 8 9 10 11

Phn trm bin pTrng Sim 2 x Sn H Ho Sn x Sn H Dc i M x Sn H Mt Hn x Sn H Phong Hu x Sn Long Lin Sn 2 x Sn Xun Bun 53 x Sui Bc Nguyn Trang x Sn Nguyn Nguyn An x Sn Nguyn Nguyn H x Sn Nguyn Nguyn Xun 1- x Sn Nguyn kVA kVA kVA kVA kVA kVA kVA kVA kVA kVA kVA mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt 50 100 50 100 50 50 50 50 100 50 37,5 35700 8800 50 100 50 100 50 50 50 50 100 50 50 20621 4457 2979 1478 2083 480 1603 486 486 1203 1203 0 0 0 0 0 0 0 0 0 0 +12,5 -15079 -4343

CI

Phn ng dy h pX Sn H - Xy dng mi c lp Kt hp - Ci to c lp Kt hp X Sn Long - Xy dng mi c lp Kt hp - Ci to c lp Kt hp X Sn Xun - Xy dng mi

1500

583

II

600

-114

1600

-397

III

3300

490 Trang

-2810

10

D n Nng cao hiu qu nng lng khu vc nng thn tnh Ph Yn.c lp Kt hp - Ci to c lp Kt hp X Sn Phc - Xy dng mi c lp Kt hp - Ci to c lp Kt hp X Sui Bc - Xy dng mi c lp Kt hp - Ci to c lp Kt hp X Sn Nguyn - Xy dng mi c lp Kt hp - Ci to c lp Kt hp mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt mt

TKBVTC490 3700 3855 1371 2484 880 880 0 155

IV

2150

-1270

0

0

V

3750

1424 1424 2732 1392 1340 3011 2621 390 0

-2326

900

1832

VI

9400

-6389

0

Quy m thay i so vi d n c duyt do nguyn nhn sau: - i vi ng dy trung p: Gim khi lng ng dy trung p do khi lng chun xc trong giai on kho st k thut phc v cng tc thit k. - i vi ng dy h p: Gim khi lng ng dy h p do Cng ty in lc Ph Yn u t xy dng (ci to) mt s xut tuyn, xy dng mi mt s nhnh r ca cc TBA thuc x Sn H, Sn Xun, Sn Phc, Sui Bc, Sn Nguyn v khi lng chun xc trong giai on thit k. - i vi TBA: Cng sut tng 12.5kVA do tn dng li MBA thu hi 22/2x0.23kV50kVA ca TBA Dc i M (ci to nng cp) x Sn H lp t cho TBA Nguyn Xun 1 s dng my bin p 22/2x0.23kV-37.5kVA. n ny ch cp n ng dy trung p, trm bin p ph ti, ng dy h p xy dng mi. Phn cng t, nhnh r mng in trong nh c cp trong n khc.

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CHNG 2 C IM CNG TRNH2.1 V tr a l v iu kin t nhin2.1.1 V tr a l Huyn Sn Ha nm v pha Ty tnh Ph Yn. Pha Bc gip huyn ng Xun. Pha Nam gip huyn Ty Ha, ng Ha v Sng Hinh. Pha ng gip huyn Ph Ha v Tuy An Pha Ty gip tnh Gia Lai - Cc tuyn cng trnh c xy dng thuc vng ng bng, a hnh tng i bng phng, mc che khut thp, ring cc tuyn ng dy h th x Sn Long v Sn Xun i qua a hnh tng i phc tp. 2.1.2 iu kin t nhin * iu kin giao thng: - Huyn Sn Ha nm dc Quc l 25 tuyn giao thng huyt mch ni lin cc tnh duyn hi Nam Trung b vi Ty Nguyn to iu kin thun li cho vic giao lu kinh t, vn ha gia min ni v ng bng. - Giao thng t Trung tm huyn n x trong huyn bng ng Quc l 25 v ng tnh l. * iu kin a hnh tuyn: Cc tuyn ng dy v cc TBA i trn b mt a hnh tng i bng phng, ch yu i trong khu dn c, ng lin thn, lin x, t mu. S t i qua rung la nc, rng trng. Mc phn ct trung bnh, tuyn b che khut bi cy ci v cng trnh nh ca. Cu to ln b mt a hnh l sn phm phong ha, bo mn, tch t ca Granit, Ba Zan c ngun gc tn tch, sn tch, trm tch tui t .

2.2 Tnh hnh li in hin trng :2.2.1 Li in trung p : - Hin trng huyn Sn Ho nhn in t trm bin p 110kV Sn Ho. Ngun in trc tip cp cho huyn l l 472-TCS H, 473 v 475 TBA 110kV Sn Ho - Cc ng dy trung th cp in cho cc TBA cho cc x thuc huyn Sn Ho ang vn hnh cp 22kV, tit din cp trc chnh AV120 v AV95 (XT 472), cp AC95 (XT 473 v XT 475) Nhn xt: Cc ng dy ny vn m bo cp in cho cc trm bin p ph ti, cc ng dy trung th xy dng mi c kt cu li ph hp vi cp in p ang vn hnh. Cc ng dy 2 pha 2 dy c d phng cho 3 pha sau ny.

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2.2.2 Trm bin p ph ti : Hin trng, cc x thuc vng d n c s lng trm bin p cung cp in cn thiu, li in h th ko di qua nhiu thn, vt qu bn knh quy nh nn vo gi cao im (18h-21h) nhiu cm ph ti khng th s dng in c. Do , nhu cu cy thm cc trm bin p p ng nhu cu s dng in ca cc h tiu th Nhn xt: Cc TBA hin trng c u t xy dng tng i ti cc a bn dn c,. Tuy nhin mt s trm c bn knh cp in qu ln nh TBA T306 Ngn in, T501 Sui Cu( X Sn H), TBA T320 Lin Sn (X Sn Long), TBA UB x Sn Nguyn, T212 Sui Bc, TBA T331 Nguyn Cam, T305 thn 2 Sn Nguyn (X Sn Nguyn), cn phi b sung thm trm sang ti, gim bn knh cp in. Cc khu vc cha c in s du t trm mi , 2.2.3 Li in h th: Li in h th sau cc trm bin p trn a bn cc x thuc huyn Sn Ho c bn giao cho ngnh in. Trong qu trnh qun l, vn hnh in Lc Ph Yn tin hnh ci to, tuy nhin ch tp trung cho cc ng trc xut tuyn c dy dn nhm trn (A) hoc dy nhm bc (AV) xung cp thnh cp vn xon ABC. Ti mt s khu vc dng dy h th cn ngn hoc c cc nhnh r phn ln do nhn dn gp vn u t theo kt cu ng dy tm (ct ct vung t c / dy nhm trn), dy dn nhm trn (A) hoc dy nhm bc (AV) xung cp Nhn xt: Li in h p hin trng sau cc TBA hin trng c u khng ng b, cc tuyn nhnh r c u t xy dng theo kiu chp v hoc ng dy tm do cc h dn t xy dng, bn knh cp in ln nn cn phi c ci to thay th, ng thi xy dng mi cc nhnh h th n cc im dn c tp trung cha c ng dy h th.

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GII PHP CP IN3.1 Ngun cp in - im u ni:3.1.1 X Sn H a. Thn Trng Sim: - Tuyn ng dy trung th 22kV xy dng mi cp in TBA thn Trng Sim 2 50kVA 22/0.4kV c im u c u ni vo ct TBA T310 Trng Sim hin c thuc XT473-Sho. im cui ti v tr ct trm bin Trng Sim 2 xy dng mi. Chiu di tuyn 2033 mt. - Gii php u ni: Ti v tr ct u ni lp mi x no II , s no 22kV sau u ni dy dn xy dng mi vo dy dn hin c bng kp quai u r v kp u chim. u ni t ng dy trung p xung my bin p bng kp quai u r v kp u chim. b. Thn Ho Sn: - Tuyn ng dy trung th 22kV xy dng mi cp in TBA thn Ho Sn 100kVA 22/0.4kV c im u c u ni vo ct s 49(88 c) thuc ng dy 22kV XT475-T110 Sho. im cui ti v tr ct trm bin p TBA Ha Sn xy dng mi. Chiu di tuyn 998 mt. - Gii php u ni: Ti v tr ct u ni lp mi x XR-CC 3 pha, s no 22kV sau u ni dy dn xy dng mi vo dy dn hin c bng kp quai u r v kp u chim qua cu ch u tuyn. u ni t ng dy trung p xung my bin p bng kp quai u r v kp u chim. c. Thn Mt Hn: - Tuyn ng dy trung th 22kV xy dng mi cp in TBA thn Mt Hn 100kVA 22/0.4kV c im u c u ni vo vo ct s 246a xy dng mi gia hai v tr ct 246(242) v 247(243) thuc ng dy 22kV XT473-T110SHo. im cui ti v tr ct trm bin p thn Mt Hn xy dng mi. Chiu di tuyn 59 mt. - Ti v tr ct u ni lp mi x v x no 3 pha, s no 22kV sau u ni dy dn xy dng mi vo dy dn hin c bng kp quai u r v kp u chim. u ni t ng dy trung p xung my bin p bng kp quai u r v kp u chim. 3.1.2 X Sui Bc a. Bun 53: - Tuyn ng dy trung th 22kV xy dng mi cp in TBA Bun 53 50kVA 22/0.4kV c im u c u ni vo ct s 34 thuc ng dy 22kV XT472-SHo nhnh r TBA T212 Sui Bc 2. im cui ti v tr ct trm bin p Bun 53 xy dng mi. Chiu di tuyn 1200 mt. - Gii php u ni: Ti v tr ct u ni lp mi x 3 pha, s no 22kV sau u ni dy dn xy dng mi vo dy dn hin c bng kp quai u r v kp u chim. u ni t ng dy trung p xung my bin p bng bng kp quai u r v kp u chim. 3.1.3 X Sn Nguyn: a. Thn Nguyn Trang : - Tuyn ng dy trung th 22kV xy dng mi cp in TBA Nguyn Trang 50kVA 22/0.4kV c im u c u ni vo ct 50a xy dng mi di tuyn ng dy trung th hin c gia 2 v tr ct 50 v 51 XT473-T110 SHo. im cui ti v tr ct trm bin p Nguyn Trang xy dng mi. Chiu di tuyn 337 mt.Trang

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- Gii php u ni: Ti v tr ct u ni lp mi x 3 pha, s , s no 22kV sau u ni dy dn xy dng mi vo dy dn hin c bng bng kp quai u r v kp u chim. u ni t ng dy trung p xung my bin p bng bng kp quai u r v kp u chim. b. Thn Nguyn An : - Tuyn ng dy trung th 22kV xy dng mi cp in TBA Nguyn An 100kVA 22/0.4kV c im u c u ni vo ct s 38 ca tuyn ng dy trung th hin c XT473-SHo. im cui ti v tr ct trm bin p Nguyn An xy dng mi. Chiu di tuyn 740 mt. - Gii php u ni: Ti v tr ct u ni lp mi x 3 pha, s no 22kV sau u ni dy dn xy dng mi vo dy dn hin c bng bng kp quai u r v kp u chim. u ni t ng dy trung p xung my bin p bng bng kp quai u r v kp u chim. c. Thn Nguyn H : - Tuyn ng dy trung th 22kV xy dng mi cp in TBA Nguyn H 50kVA 22/0.4kV c im u c u ni vo ct TBA T305 thn 2 Sn Nguyn thuc XT473T110 SHo. im cui ti v tr ct trm bin p Nguyn H xy dng mi. Chiu di tuyn 699 mt. - Gii php u ni: Ti v tr ct u ni lp mi x 3 pha, s no 22kV sau u ni dy dn xy dng mi vo dy dn hin c bng bng kp quai u r v kp u chim. u ni t ng dy trung p xung my bin p bng bng kp quai u r v kp u chim.

3.2 Gii php cp in :3.2.1 Tuyn ng dy trung th: Tng ng dy trung p xy dng mi l 6.066 mt, trong : + Tuyn ng dy trung p i kt hp 3 pha 3 dy : 6.066 m 3.2.1.1 X Sn H a. Thn Trng Sim: - Tuyn ng dy trung th 22kV xy dng mi cp in TBA thn Trng Sim 50kVA 22/0.4kV c im u c u ni vo ct TBA T310 Trng Sim hin c thuc XT473-Sho. im cui ti v tr ct trm bin Trng Sim 2 xy dng mi. Chiu di tuyn 2033 mt, mng 3 pha 3 dy treo trn ct btng ly tm. Dy dn s dng dy AC-50/8. * M t tuyn: - T im u ti G1: Chiu di 42m. T ct u ni (ct TBA T310 Trng Sim hin c tuyn i vt ng n v tr G1. V tr G1 nm cch mp ng giao thng lin thn 1.5m - T G1 n G2 di 52m: Ti G1 tuyn li tri gc t= 19O20, sau tuyn i dc ng lin thn n ti v tr G2. V tr G2 nm cch mp ng 1.5m. - T G2 n G3 di 42m: Ti G2 tuyn li tri gc t= 17O18, sau tuyn vt ng lin thn n ti v tr G3. V tr G3 nm gia ct h p TBA Trng Sim s 02 v s 03.

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- T G3 n G4 di 325m: Ti G3 tuyn li phi gc p= 9O25, sau tuyn i dc ng lin thn n ti v tr G4. V tr G4 nm k st ct h p s 10 TBA T310 Trng Sim. - T G4 n G5 di 55m: Ti G4 tuyn li phi gc p= 33O12, sau tuyn vt ng lin thn n v tr G5. V tr G5 nm cch mp ng 3m. - T G5 n G6 di 387m: Ti G5 tuyn li phi gc p= 13O16, sau tuyn i dc ng lin thn n ti v tr G6. V tr G6 nm cch mp ng 3m. - T G6 n G7 di 51m: Ti G6 tuyn li tri gc t= 28O12, sau tuyn i dc ng lin thn n ti v tr G7. V tr G7 nm k st tr h p cui TBA T310 Trng Sim. - T G7 n G8 di 458m: Ti G7 tuyn li tri gc t= 15O24, sau tuyn i dc ng lin thn n ti v tr G8. V tr G8 nm cch mp ng 3m. - T G8 n G9 di 212m: Ti G8 tuyn li tri gc t= 10O16, sau tuyn i dc ng lin thn n ti v tr G8. V tr G8 nm cch mp ng 3m. - T G8 n v tr cui di 409m: T G8 tuyn li phi gc p = O 13 28, sau tuyn i dc ng lin thn n v tr cui. V tr cui nm trc nh Nguyn Vn Hong thn Trng Sim. Trm bin p d kin c b tr ti v tr ny. Nhn chung, tuyn ng dy phn ln bm theo trc ng giao thng. Trong hnh lang tuyn c nhiu cy trng lu nm. b. Thn Ho Sn: - Tuyn ng dy trung th 22kV xy dng mi cp in TBA thn Ho Sn 100kVA 22/0.4kV c im u c u ni vo ct s 49(88 c) thuc ng dy 22kV XT475-T110 Sho. im cui ti v tr ct trm bin p TBA Ha Sn xy dng mi. Chiu di tuyn 998 mt, mng 3 pha 3 dy treo trn ct btng ly tm. Dy dn s dng dy AC50/8. * M t tuyn: - T im u ti G1: Chiu di 42m. T ct u ni (ct s 49 XT475T110-SHo) hin c tuyn i vt ng n v tr G1. V tr G1 nm cch mp tng ro UBND x Sn H v nm ngoi l gii giao thng ng QL25. - T G1 n G2 di 46m: Ti G1 tuyn li tri gc t= 65O28, sau tuyn vt ng lin thn n ti v tr G2. V tr G2 nm cch ct h p s 02 TBA T306 Ngn in nhnh r Ha Sn mt khong 14m. - T G2 n G3 di 628m: Ti G2 tuyn li phi gc p= 11O17, sau tuyn i kt hp ct h p TBA T306 Ngn in n ti v tr G3. V tr G3 nm ti ct h p s 14 TBA T306 Ngn in. - T G4 n v tr cui di 299m: T G4 tuyn li phi gc p = 20O12, sau tuyn i kt hp ct h p TBA T306 Ngn in n ti v tr cui. V tr cui ti ct h p s 20 TBA T306 Ngn in nm trc nh Phm Hu Quang. Trm bin p d kin c b tr ti v tr ny.Trang

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Nhn chung Tuyn ng dy xy dng mi i kt hp ct ca ng dy h p hin c T306 Ngn in ang i trn ct LT10.5m. Trong hnh lang tuyn c nhiu cy n qu nh xoi, mt. c. Thn Mt Hn: - Tuyn ng dy trung th 22kV xy dng mi cp in TBA thn Mt Hn 100kVA 22/0.4kV c im u c u ni vo vo ct s 246a xy dng mi gia hai v tr ct 246(242) v 247(243) thuc ng dy 22kV XT473-T110SHo. im cui ti v tr ct trm bin p thn Mt Hn xy dng mi. Chiu di tuyn 59 mt, mng 3 pha 3 dy treo trn ct btng ly tm. Dy dn s dng dy AC-50/8. * M t tuyn: - T im u ti im cui: Chiu di 59m. T ct u ni tuyn i bng qua t mu trng ma v sn n v tr cui t TBA. V tr TBA nm trn t ng Din Hng cnh ng Quc l 25 v nm ngoi l gii giao thng. Nhn chung, tuyn ng dy phn ln bng qua t trng ma v sn \3.1.2 X Sui Bc a. Bun 53: - Tuyn ng dy trung th 22kV xy dng mi cp in TBA Bun 53 50kVA 22/0.4kV c im u c u ni vo ct s 34 thuc ng dy 22kV XT472-SHo nhnh r TBA T212 Sui Bc 2. im cui ti v tr ct trm bin p Bun 53 xy dng mi. Chiu di tuyn 1200 mt, mng 3 pha 3 dy treo trn ct btng ly tm. Dy dn s dng dy AC50/8. * M t tuyn: - T im u ti G1: Chiu di 41m. T ct u ni (ct s 34 XT475T110-SHo) hin c tuyn i vt ng n v tr G1. V tr G1 nm cch mp tng ro nh dn v cch mp ng giao thng lin thn 2m. - T G1 n G2 di 354m: Ti G1 tuyn li phi gc p= 42O24, sau tuyn i dc ng giao thng lin thn n ti v tr G2. V tr G2 nm cch mp ng 2m. - T G2 n G3 di 31m: Ti G2 tuyn li tri gc t= 07O06, sau tuyn vt ng n ti v tr G3. V tr G3 nm gn ct h p 9 TBA T212 Sui Bc 2. - T G3 n G4 di 75m: Ti G3 tuyn li tri gc t= 79O25, sau tuyn vt ng n ti v tr G4. V tr G4 nm ngay ti v tr ct h p 10.5m TBA T212 Sui Bc 2. - T G4 n v tr cui di 699m: T G4 tuyn li phi gc p = 14O12, sau tuyn i kt hp ct h p TBA T212 Sui Bc n ti v tr cui. V tr cui ti ct h p 10.5m TBA T212 Sui Bc nm trc nh Y Dng. Trm bin p d kin c b tr ti v tr ny. Nhn chung Tuyn ng dy xy dng mi i kt hp ct ca ng dy h p hin c T212 Sui Bc 2 ang i trn ct LT10.5m t G4

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n im cui. Trong hnh lang tuyn c nhiu cy n qu nh xoi, mt. 3.1.3 X Sn Nguyn: a. Thn Nguyn Trang : - Tuyn ng dy trung th 22kV xy dng mi cp in TBA Nguyn Trang 50kVA 22/0.4kV c im u c u ni vo ct 50a xy dng mi di tuyn ng dy trung th hin c gia 2 v tr ct 50 v 51 XT473-T110 SHo. im cui ti v tr ct trm bin p Nguyn Trang xy dng mi. Chiu di tuyn 337 mt, mng 3 pha 3 dy treo trn ct btng ly tm. Dy dn s dng dy AC-50/8. * M t tuyn: - T im u ti G1: Chiu di 37m. T ct u ni ct LT 10,5m s 30a trng mi tuyn i vt ng n v tr G1. V tr G1 nm gia ranh gii 2 nh dc ng lin thn cch mp ng 2m. - T G1 n G2 di 157m: Ti G1 tuyn li phi gc p= 12O18, tuyn i bng qua t mu dc theo ng giao thng n G2. V tr G2 nm trn t trng ma cch mp ng 5m. - T G2 n v tr cui di 137m: T G2 tuyn li phi gc p= 07O22, sau tuyn vt ng n v tr cui. V tr cui nm trn ng giao thng st tng ro trng tiu hc Sn Nguyn, trm bin p c b tr ti v tr ny. Nhn chung, tuyn ng dy phn ln i qua t mu v cy trng lu nm. b. Thn Nguyn An : - Tuyn ng dy trung th 22kV xy dng mi cp in TBA Nguyn An 100kVA 22/0.4kV c im u c u ni vo ct s 38 ca tuyn ng dy trung th hin c XT473-SHo. im cui ti v tr ct trm bin p Nguyn An xy dng mi. Chiu di tuyn 740 mt, mng 3 pha 3 dy treo trn ct btng ly tm. Dy dn s dng dy AC-50/8. * M t tuyn: - T im u ti G1: Chiu di 39m. T ct u ni tuyn i vt ng n v tr G1. V tr G1 nm gia ranh gii 2 nh dc ng lin thn cch mp ng 2m. - T G1 n G2 di 406m: Ti G1 tuyn li phi gc p= 21O12, tuyn i dc theo ng lin thn qua khu vc nh ca ng c n G2. V tr G2 nm trn t trng ma cch mp ng 5m. - T G2 n G3 di 406m: Ti G2 tuyn li phi gc p= 20O19, tuyn vt ng n v tr G3. V tr G3 l v tr ct HA 10.5m hin c TBA T331 Nguyn Cam. - T G3 n v tr cui di 240m: T G3 tuyn li tri gc t= 09O22, sau tuyn i kt hp ct h p 10.5m hin c TBA T331 Nguyn Cam n v tr cui. V tr cui nm trn t mu st ng giao thng, trm bin p c b tr ti v tr ny. c. Thn Nguyn H : - Tuyn ng dy trung th 22kV xy dng mi cp in TBA Nguyn H 50kVA Trang

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22/0.4kV c im u c u ni vo ct TBA T305 thn 2 Sn Nguyn thuc XT473T110 SHo. im cui ti v tr ct trm bin p Nguyn H xy dng mi. Chiu di tuyn 699 mt, mng 3 pha 3 dy treo trn ct btng ly tm. Dy dn s dng dy AC-50/8. * M t tuyn: - T im u ti G1: Chiu di 43m. T ct u ni tuyn i vt ng n v tr G1. V tr G1 nm cnh ng t ng lin thn cch mp ng 2m. - T G1 n G2 di 26m: Ti G1 tuyn li tri gc t= 129O00, tuyn i vt ng lin thn n G2. V tr G2 nm ranh gii gia 2 nh v cch mp ng 1.5m. - T G2 n G3 di 244m: Ti G2 tuyn li phi gc p= 39O18, tuyn i dc theo ng giao thng qua khu vc ng dn c n v tr G3. - T G3 n G4 di 323m: Ti G3 tuyn li tri gc t= 06O24, tuyn i bng qua t trng ma dc ng lin thn n G4. V tr G4 nm trn t trng ma cch mp ng 5m. - T G4 n v tr cui di 63m: T G4 tuyn li tri gc t= 07O17, sau tuyn i vt ng lin thn kt khong gia hai v tr ct h p s 14 v 15 thuc TBA T305thn 2 Sn Nguyn hin c. Trm bin p c b tr ti v tr ny. Nhn chung, tuyn ng dy phn ln i qua t mu v cy trng lu nm. 3.2.2 V tr v cng sut trm bin p: - Xy dng mi 09 TBA 22/0.4kV. - Ci to nng cng sut 01 TBA 50kVA-22/2x0.23kV thnh 50kVA-22/0.4kV - Xy dng mi 01 TBA 2 pha 50kVA-22/2x0.23kV (Tn dng li MBA 2 pha 50kVA-22/2x0.23kV thu hi ca TBA Dc i M nng cp ci to) 3.2.2.1 X Sn H a. TBA thn Trng Sim: - Xy dng mi 01 TBA Trng Sim 2 50kVA - 22/0.4kV cp in cho thn Trng Sim, x Sn H - huyn Sn Ha. V tr t trm trc nh Nguyn Vn Hong. - Kiu trm: treo trn 02 ct btng ly tm 12m xy dng mi, khng c tng ro bo v. b. TBA thn Ha Sn: - Xy dng mi 01 TBA Ha Sn 100kVA - 22/0.4kV sang ti cho TBA T306 Ngn in cp in cho thn Ha Sn, x Sn H - huyn Sn Ha. V tr t trm trng v tr ct h th s 20 hin trng thuc TBA T306 Ngn in . - Kiu trm: treo trn 02 ct btng ly tm 12m xy dng mi, khng c tng ro bo v. c. TBA T301 Dc i M: - Ci to nng cp sut TBA T301 Dc i M t 2 pha 50kVA-22/2x0.23kV thnh 3 pha 50kVA-22/0.4kV .Trang

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- Kiu trm: treo trn 02 ct btng ly tm 12m xy dng mi, khng c tng ro bo v. * Phng n ci to: Xy dng mi ct, thay my bin p, cp trung th, cu ch t ri, thu li van, t in trm, cp l tng h p. Tn dng li h thng tip a trm bin p. d. TBA Mt Hn: - Xy dng mi 01 TBA Mt Hn 100kVA - 22/0.4kV sang ti cho TBA T501 Sui Cau ng thi cp in cho thn Mt Hn , x Sn H - huyn Sn Ha. V tr t trm gn v tr tr h th s 50 thuc TBA T501 Sui Cau trn t mu ng Din Hng. - Kiu trm: treo trn 02 ct btng ly tm 12m xy dng mi, khng c tng ro bo v. 3.2.2.2 X Sn Long a. TBA Phong Hu 2: - Xy dng mi 01 TBA Phong Hu 2 50kVA - 22/0.4kV cp in cho thn Phong Hu, x Sn Long - huyn Sn Ha. V tr t di tuyn ng dy trung th hin c gi 2 v tr ct s 84 v 85 XT473-SHo nhnh r T326 Nh th Bc H. TBA t cnh ng giao thng trn t cnh nh Dng Vn Thit. - Kiu trm: treo trn 02 ct btng ly tm 12m xy dng mi, khng c tng ro bo v. 3.2.2.3 X Sn Xun a. TBA Lin Sn 2 - Xy dng mi 01 TBA Lin Sn 2 50kVA - 22/0.4kV sang ti cho TBA T320 Lin Sn ng thi cp in cho thn Lin Sn, x Sn Xun - huyn Sn Ha. TBA t di tuyn ng dy trung th hin c gia 2 v tr ct s 206 v 207 XT473-SHo. TBA t trng v tr tr h th s 3A TBA T320 Lin Sn. - Kiu trm: treo trn 02 ct btng ly tm 12m xy dng mi, khng c tng ro bo v. 3.2.2.4 X Sui Bc a. TBA Bun 53: - Xy dng mi 01 TBA Bun 53 50kVA - 22/0.4kV sang ti TBA T212 Sui Bc 2 ng thi cp in cho Bun 53 x Sui Bc - huyn Sn Ha. V tr t trng v tr tr h th 10.5 cui trc nh Y Dng. - Kiu trm: treo trn 02 ct btng ly tm 10,5m (01 ct xy dng mi), khng c tng ro bo v. 3.2.2.5 X Sn Nguyn a. TBA Nguyn Trang - Xy dng mi 01 TBA Nguyn Trang 50kVA - 22/0.4kV sang ti cho TBA T304 UB x Sn Nguyn ng thi cp in cho thn Nguyn Trang x Sn Nguyn - huyn Sn Ha. V tr t trm t trng vi tr h th s 07 TBA T304 UB Sn Nguyn. TBA t k trng tiu hc Sn Nguyn. - Kiu trm: treo trn 02 ct btng ly tm 12m xy dng mi, khng c tng ro bo v.Trang

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b. TBA Nguyn An - Xy dng mi 01 TBA Nguyn An 100kVA - 22/0.4kV sang ti cho TBA T331 Nguyn Cam, cp in cho thn Nguyn An x Sn Nguyn - huyn Sn Ha. V tr t trm nm trng v tr tr h th (tr 10.5m cui cng) ca nhnh r t ct ha p s 38 TBA T331 Nguyn Cam i Nguyn An hin trng. - Kiu trm: treo trn 02 ct btng ly tm 10,5m hin trng, khng c tng ro bo v. c. TBA Nguyn H - Xy dng mi 01 TBA Nguyn H 50kVA - 22/0.4kV sang ti cho TBA T305 thn 2 Sn Nguyn ng thi cp in cho thn Nguyn H x Sn Nguyn - huyn Sn Ha. V tr t trm ti gia 2 v tr tr h th s 14 v 15 TBA T305 thn 2 Sn Nguyn. - Kiu trm: treo trn 02 ct btng ly tm 10,5m xy dng mi, khng c tng ro bo v. d. TBA Nguyn Xun 1 - Xy dng mi 01 TBA Nguyn Xun 1 50kVA - 22/2x0.23kV cp in cho thn Nguyn Xun. V tr t trm t gia 2 v tr ct trung p s 60 v 61 thuc XT473-SHo. - Kiu trm: treo trn 01 ct btng ly tm 10,5m xy dng mi, khng c tng ro bo v. - Tn dng li MBA thu hi 22/2x0.23kV-50kVA ca TBA Dc i M (ci to nng cp) x Sn H lp t cho TBA Nguyn Xun 1. 3.2.3 Tuyn ng dy h th: 3.2.3.1 X Sn H: a. TBA Trng Sim 2: Tng chiu di tuyn l : 1779m, gm 2 xut tuyn Trong : Mng 3 pha 4 dy i c lp xy dng mi : 700m. Mng 3 pha 4 dy i kt hp trung th xy dng mi : 1079m. * im u : Ti v tr trm bin p Trng Sim xy dng mi . * im cui : Ti cc v tr tr cui TT13 v 14 * M t tuyn: Xut tuyn 1: T TBA tuyn i kt hp vi tr trung th dc theo ng giao thng n v tr ct cui tuyn s TT13. Chiu di tuyn l: 1079m. Xut tuyn 2: T TBA tuyn i c lp dc theo ng giao thng lin thn n v tr ct cui tuyn s 14. Chiu di tuyn l: 700m. b. TBA Ha Sn: ng dy h p ca TBA Ho Sn gm 470 m xy dng mi cp in cho khu vc cha c in ca thn Ho Sn v sang ti cho TBA T306 Ngn in. on tuyn sang ti t ct s 02 n ct cui tuyn s 28 nhnh r h p TBA T306 Ngn in cp cho thn Ho Sn ** Phn xy dng mi : chiu di tuyn: 470m. Trong : Mng 3 pha 4 dy xy dng mi i c lp : 470m.

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TKBVTC

* im u : Ti v tr ct 28 h th hin trng TBA T306 Ngn in chuyn sang cho TBA Ho Sn . * im cui : Ti v tr tr cui s 28/12 * M t tuyn: Xut tuyn 1: - T v tr ct 28 h th hin trng, tuyn tip tc i c lp mng 3 pha 4 dy dc theo ng giao thng n v tr cui s 28/12. Chiu di tuyn: 470m. ** Phn tn dng li hin trng : + c im hin trng ca tuyn ng dy hin trng : Tuyn ng dy hin trng tn dng l tuyn ng dy h p thuc TBA T306 Ngn in cp in cho thn Ho Sn t ct 02 n ct cui tuyn s 28. Hin trng tuyn ng dy h th ny c kt cu li 3 pha 4 dy i c lp trn ct LT10,5m v LT8.4m. Dy dn s dng dy cp vn xon ABC(4x70), kt cu cn mi m bo yu cu k thut. + Phng n ci to: Tn dng li ton b kt cu tuyn h p trn , chuyn sang cho TBA Ho Sn sang ti cho TBA T306 Ngn in. c. TBA T301 Dc i M: Tng chiu di tuyn: 2263m, Gm 2 xut tuyn Trong : Mng 3 pha 4 dy i c lp ci to 1 phn : 480m. Mng 3 pha 4 dy i kt hp ci to 1 phn : 1243m. Mng 3 pha 4 dy i c lp ci to hon ton : 360m. Mng 1 pha 2 dy i c lp xy dng mi : 180m. ** Phn xy dng mi : Chiu di tuyn l 180m. Trong : Mng 1 pha 2 dy i c lp xy dng mi : 180m. * im u : Ti cc v tr : v tr ct h th hin trng s 04 xut tuyn 2, v tr ct 05 h th hin trng nhnh r xut tuyn 2. * im cui : Ti cc v tr cui 04/3, 05/1 * M t tuyn: Xut tuyn 1: V tr u ni 1: T v tr ct 04 h th hin trng trn xut tuyn 2, tuyn i c lp mng 1 pha 2 dy dc theo ng giao thng n v tr cui 04/3. Chiu di tuyn: 130m. V tr u ni 2: T v tr ct 05 h th hin trng nhnh r trn xut tuyn 2, tuyn i c lp mng 1 pha 2 dy n v tr cui 05/1. Chiu di tuyn: 50m. ** Phn ci to : Chiu di tuyn l 2083m. Trong : Mng 3 pha 4 dy i c lp ci to 1 phn : 480m. Mng 3 pha 4 dy i kt hp ci to 1 phn : 1243m. Mng 3 pha 4 dy i c lp ci to hon ton : 360m. + c im hin trng ca tuyn ng dy cn ci to : Tuyn ng dy cn ci to l tuyn ng dy h p 1 pha 2 dy i c lp v i kt hp thuc TBA 1 pha T301 Dc i M hin trng nay ci to thnh 3 pha, v tuynTrang

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ng dy ny i 1 pha 2 dy trn ct b tng, v vy sau khi ci to TBA thnh 3 pha phi ci to tuyn ng dy h p ny cho ph hp vi trm 3 pha sau ci to: * im u : Ti trm bin p T301 Dc i M. * im cui : Ti cc v tr tr cui 11 , 14, 08 v 04/7. * M t tuyn: Xut tuyn 1: T TBA tuyn trc chnh i trng vi tuyn trung th hin trng n tr cui 11. Chiu di tuyn: 532m. Xut tuyn 2: T v tr TBA tuyn i kt hp trung th trc chnh n v tr cui 14 di 711m. T v tr tr trung th 07 tuyn r nhnh 3 pha 4 dy i c lp trn ct LT8.4m hin c n ct 05 di 206m. T y tuyn i c lp trn ct LT8.4m hin c n v tr cui 08 v n 04. Ti 04 tuyn i c lp trn ct LT8.4m xy dng mi n im cui ti ct s 04/7, di 360m. d. TBA T303 Thnh Hi: Tng chiu di tuyn l: 625m Trong : Mng 3 pha 4 dy i c lp xy dng mi : 270m. Mng 1 pha 2 dy i c lp xy dng mi : 355m. * im u : Ti cc v tr ct 12, 04, 05 hin trng ca xut tuyn 1; ct 07, 11 hin trng ca xut tuyn 2. * im cui : Ti cc v tr tr cui s 12/3, 12/2, 04/2 v 05/2 ca xut tuyn 1; ct s 7/6, 7/8 v 11/2 ca xut tuyn 2. * M t tuyn: Xut tuyn 1: - V tr u ni 1: T ct h p 05 ca xut tuyn 1(ct 05 b nt v nghing) tuyn i thng n v tr 5/1, ti y tuyn li phi i n v tr cui tuyn 5/2. Chiu di tuyn l: 70m. - V tr u ni 2: T ct h p 04 ca xut tuyn 1 tuyn n v tr cui tuyn 04/2. Chiu di tuyn l: 80m. - V tr u ni 3: T ct h p 12 ca nhnh r xut tuyn 1, tuyn i n v btris ct s 12/1 ri r 2 nhnh i n cc v tr cui tuyn 12/2 v 12/3. Chiu di tuyn l: 105m. Xut tuyn 2: - V tr u ni 4: T ct h p 07 ca xut tuyn 2, tuyn i n v tr ct s 7/5 ri r 2 nhnh i n cc v tr cui tuyn 7/6 v 7/8. Chiu di tuyn l: 270m. - V tr u ni 5: T ct h p 11 ca nhnh r xut tuyn 2 tuyn n v tr cui tuyn s 11/2. Chiu di tuyn l: 100m. e. TBA T302 i 4 Sn H: Tng chiu di tuyn l : 225m Trong : Mng 1 pha 2 dy i c lp xy dng mi : 225m. * im u : Ti cc v tr ct 02, 03 ca xut tuyn 2. * im cui : Ti cc v tr tr cui s 2/4 v 3/2Trang

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* M t tuyn: Xut tuyn 2: - V tr u ni 1: T ct trung h p s 02, tuyn i c lp n v tr cui tuyn 2/4. Chiu di tuyn l: 125m. - V tr u ni 2: T ct trung h p s 03, tuyn i c lp n v tr cui tuyn 3/2. Chiu di tuyn l: 100m. f. TBA T306 Ngn in: Tng chiu di tuyn l : 689m Trong : Mng 3 pha 4 dy i c lp xy dng mi : 290m. Mng 3 pha 4 dy i kt hp xy dng mi : 399m * im u : Ti cc v tr ct 18 xut tuyn 1; ct 04 xut tuyn 2 v ct 14 ca nhnh r xut tuyn 2. * im cui : Ti cc v tr tr cui 22, 4/4 v 14/4 * M t tuyn: Xut tuyn 1 - V tr u ni 1: T ct trung h p i kt hp s 18, tuyn n i v tr cui tuyn s 22. Chiu di tuyn l: 398m. Xut tuyn 2: - V tr u ni 2: T ct trung h p i kt hp s 04, tuyn n v tr cui tuyn s 4/4. Chiu di tuyn l: 170m. - V tr u ni 3: T ct trung h p i kt hp s 14, tuyn n v tr cui tuyn s 14/4. Chiu di tuyn l: 120m. g.TBA T311 Ngn in 2: Tng chiu di tuyn l : 285m Trong : Mng 3 pha 4 dy i c lp xy dng mi : 285m. * im u : Ti v tr ct trung h th s 02 xut tuyn 1. * im cui : Ti v tr tr cui s 2/7 * M t tuyn: Xut tuyn 1 - V tr u ni 1: T ct trung h p s 02 tuyn i c lp n v tr cui tuyn 2/7. Chiu di tuyn l: 285m. h. TBA T311 Ngn in 3: Tng chiu di tuyn l : 179m Trong : Mng 3 pha 4 dy i c lp xy dng mi : 179m. * im u : Ti v tr ct h th 08 xut tuyn 1 * im cui : Ti v tr tr cui s 8/5 * M t tuyn: Xut tuyn 1Trang

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- V tr u ni 1: T ct h p 08 tuyn i c lp n v tr cui tuyn s 8/5. Chiu

di tuyn l: 179m. i. TBA Mt Hn: ng dy h p ca TBA Mt Hn gm 25 m (mch kp) xy dng mi u ni t TBA Mt Hn vo li hin trng sang ti cho TBA T501 Sui Cau. on tuyn sang ti t ct s 44 n ct cui tuyn s 76 nhnh r h p TBA T501 Sui Cau cp cho thn Mt Hn. ** Phn xy dng mi : chiu di tuyn: 25m Trong : Mng 3 pha 4 dy (mch kp) xy dng mi i c lp : 25m. * im u : Ti v tr ct TBA Mt Hn xy dng mi (gn k ct h th s 50 xut tuyn 2 TBA T501 Sui Cau). * im cui : Ti v tr tr cui s 50 (h th xut tuyn 2 TBA T501 Sui Cau chuyn qua cho TBA mt Hn). * M t tuyn: T TBA Mt Hn i ra 2 xut tuyn n u ni vo ct s 50 ca li h th hin trng v tch lm 2 xut tuyn ** Phn tn dng li hin trng : + c im hin trng ca tuyn ng dy hin trng : Tuyn ng dy hin trng tn dng l tuyn ng dy h p thuc TBA T501 Sui Cau cp in cho thn Mt Hn t ct 44 n ct cui tuyn s 76. Hin trng tuyn ng dy h th ny c kt cu li 3 pha 4 dy i c lp trn ct LT8.4m. Dy dn s dng dy cp vn xon ABC(4x70), kt cu cn mi m bo yu cu k thut. + Phng n ci to: Tn dng li ton b kt cu tuyn h p trn , chuyn sang cho TBA Mt Hn sang ti cho TBA T501 Sui Cau. 3.2.3.2 X Sn Long: a. TBA T330 Phong Hu: ** Phn ci to : Tng chiu di tuyn: 1203m, Gm 2 xut tuyn Trong : Mng 1 pha 2 dy i c lp ci to mt phn : 1203m + c im hin trng ca tuyn ng dy cn ci to : Hin trng tuyn ng dy h th TBA T330 Phong Hu l 1 pha 2 dy i trn ct LT8.4m. Dy dn s dng dy AV50 s dng lu nn cch in khng cn m bo, x ang s dng l x rc nay r rt. + Phng n ci to: Tn dng li ct, thay dy dn hin trng bng cp vn xon. * im u : Ti v tr trm bin p T330 Phong Hu hin c. * im cui : Ti cc v tr tr cui 12 xut tuyn 1 v s 12 xut tuyn 2. * M t tuyn: Xut tuyn 1: T TBA tuyn i c lp trn ct LT8.4m hin c n v tr cui s 12. Chiu di tuyn: 600m.Trang

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Xut tuyn 2: T TBA tuyn i c lp trn ct LT8.4m hin c n v tr cui s 12. Chiu di tuyn: 603m. b. TBA Phong Hu 2: Tng chiu di tuyn: 485m ch yu cp in cho xm Phong Cau. Trong : Mng 3 pha 4 dy xy dng mi i kt hp : 485m. * im u : Ti v tr ct TBA Phong Hu 2 xy dng mi. * im cui : Ti cc v tr tr cui s 81 v 86 thuc XT473-SHo nhnh r nh th Bc H. * M t tuyn: Xut tuyn 1: T TBA tuyn i kt hp trn ct trung th hin c thuc XT473-SHo nhnh r nh th Bc H n v tr ct trung th s 86. Chiu di tuyn 139m. Xut tuyn 2: T TBA tuyn i kt hp trn ct trung th hin c thuc XT473-SHo nhnh r nh th Bc H n v tr ct trung th s 81. Chiu di tuyn 347m. 3.2.3.3 Sn Xun a. TBA T315 Xun Sn: Hin trng tuyn ng dy h p thuc TBA T315 Xun Sn trc chnh v cc nhnh r c in lc Sn Ha ci to v xy dng mi, do h s ny khng cp n. b. TBA T319 UB Sn Xun: Tng chiu di tuyn: 2236m. Gm 2 xut tuyn Trong : Mng 3 pha 4 dy i kt hp trung p ci to 1 phn : 1896m Mng 3 pha 4 dy i c lp ci to mt phn : 100m. Mng 3 pha 4 dy i c lp xy dng mi: 240m. ** Phn xy dng mi : Chiu di tuyn l 240m. Trong : Mng 3 pha 4 dy i c lp xy dng mi : 240m * im u : Ti v tr ct h th s 13 xut tuyn 1. * im cui : Ti v tr ct cui s 18 * M t tuyn: Xut tuyn 1 : T v tr ct h th s 13 hin trng tuyn i c lp dc theo ng giao thng n v tr cui s 18 di 240m. ** Phn ci to : Chiu di tuyn l 1996m. Trong : Mng 3 pha 4 dy i kt hp trung p hin trng ci to mt phn : 1896m. Mng 3 pha 4 dy i c lp ci to mt phn : 100m. + c im hin trng ca tuyn ng dy cn ci to : Hin trng tuyn ng dy h th TBA T319 UB Sn Xun do hp tc x bn giao. Kt cu li 3 pha 4 dy i kt hp trn ct trung th, 1 phn i trn ct LT8.4m. Dy dn s dng dy 3AV70 + 1AV50 s dng lu nn cch in khng cn m bo, x ang s dng l x puly nay r rt. + Phng n ci to: Tn dng li ct, thay dy dn hin trng bng cp vn xon. * im u : Ti v tr trm bin p T319 UB Sn Xun hin trng.Trang

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* im cui : Ti cc v tr tr cui 206 v 13. * M t tuyn: Xut tuyn 1: T TBA tuyn i kt hp tuyn trung p hin trng n v tr ct 185 vi chiu di tuyn 1100m, t y tuyn i c lp trn ct LT8.4m n v tr cui s 13 di 100m. Xut tuyn 2: T TBA tuyn i kt hp tuyn trung p hin trng n v tr ct cui 206 vi chiu di tuyn 796m. c. TBA T320 Lin Sn: Tng chiu di tuyn: 1269m. Gm 2 xut tuyn Trong : Mng 3 pha 4 dy i kt hp trung p ci to 1 phn : 239m Mng 3 pha 4 dy i c lp ci to mt phn : 780m. Mng 3 pha 4 dy i c lp xy dng mi: 250m. ** Phn xy dng mi : Chiu di tuyn l 250m. Trong : Mng 3 pha 4 dy i c lp xy dng mi : 250m * im u : Ti v tr ct h th s 16 xut tuyn 2. * im cui : Ti cc v tr cui 16/5 * M t tuyn: Xut tuyn 2: T v tr ct h th s 16 hin trng tuyn i c lp dc theo ng giao thng n v tr cui 16/5 di 250m. ** Phn ci to : Chiu di tuyn l 1019m. Trong : Mng 3 pha 4 dy i kt hp trung p hin trng ci to mt phn : 239m. Mng 3 pha 4 dy i c lp ci to mt phn : 780m. + c im hin trng ca tuyn ng dy cn ci to : Hin trng tuyn ng dy h th TBA T320 Lin Sn do Hp tc x bn giao. Kt cu li 3 pha 4 dy i c lp trn ct LT8.4m, 1 phn i kt hp trn ct trung th. Dy dn s dng dy 3AV70 + 1AV50 s dng lu nn cch in khng cn m bo, x ang s dng l x puly nay r rt. + Phng n ci to: Tn dng li ct, thay dy dn hin trng bng cp vn xon. * im u : Ti v tr trm bin p T320 Lin Sn hin trng. * im cui : Ti cc v tr tr cui 16 v 189. * M t tuyn: Xut tuyn 1: T TBA tuyn i c lp trn ct h th hin trng n v tr ct cui 16 vi chiu di tuyn 780m. Xut tuyn 2: T TBA tuyn i kt hp tuyn trung p hin trng n v tr ct cui 189 vi chiu di tuyn 239m. d. TBA Lin Sn 2 : ng dy h p ca TBA Lin Sn 2 c chuyn sang t TBA T320 Lin Sn sang ti. on tuyn sang ti t ct trung, h p s 190 n ct h p cui tuyn s 10A thuc xut tuyn 1 h p TBA Lin Sn. Tuyn h p ny s dc ci to.Trang

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** Phn ci to : Tng chiu di ng dy h th l 840m, gm 2 xut tuyn Trong : Mng 3 pha 4 dy i c lp ci to 1 phn : 491m. Mng 3 pha 4 dy i kt hp ci to 1 phn : 349m. + c im hin trng ca tuyn ng dy cn ci to : Tuyn ng dy cn ci to l tuyn ng dy h p thuc TBA T320 Lin Sn hin trng nay chuyn sang cho TBA Lin Sn 2 sang ti. Hin trng tuyn ng dy h th ny do Hp tc x bn giao. Kt cu li 3 pha 4 dy i c lp trn ct LT8.4m, 1 phn i kt hp trn ct trung th. Dy dn s dng dy 3AV70 + 1AV50 s dng lu nn cch in khng cn m bo, x ang s dng l x puly nay r rt. + Phng n ci to: Tn dng li ct, thay dy dn hin trng bng cp vn xon. * im u : Ti v tr TBA Lin Sn 2 xy dng mi trng vi ct h p 3A ca h th TBA T320 Lin Sn hin trng. * im cui : Ti cc v tr tr cui ca li h th hin trng T320 Lin Sn s 10A v 190. * M t tuyn: Xut tuyn 1: T TBA tuyn i c lp trn ct LT8.4m n v tr ct trung, h p 196, di 145m, t ct 196 tuyn i kt hp ct trung th n v tr cui s 190, di 349m. Xut tuyn 2: T TBA tuyn i c lp trn ct LT8.4m n v tr ct h p 4A, di 52m sau i dc ng lien thn n v tr cui 10A, di 294m. 3.2.3.4 X Sn Phc: a. TBA T131 Bun Ma G Tng chiu di tuyn: 85m Trong : Mng 1 pha 2 dy xy dng mi i c lp : 85m. * im u : Ti v tr ct s 2 xut tuyn 2 TBA T131 Bun Ma G hin c. * im cui : Ti v tr ct cui 2/3. * M t tuyn: V tr u ni 1: T ct h th s 02 xut tuyn 2 TBA T131 tuyn i c lp n v tri ct 2/1 sau i dc theo ng lin thn n v tr cui 2/3 di 85m. b. TBA T116 Tn Hin Tng chiu di tuyn: 325m Trong : Mng 1 pha 2 dy xy dng mi i c lp : 325m. * im u : Ti v tr ct s 06, 08 xut tuyn 1 v 06 xut tuyn 2 TBA T116 Tn Hin hin c. * im cui : Ti cc v tr 06/2, 08/3 v 6/3. * M t tuyn: V tr u ni 1: T ct h th s 06 xut tuyn 1 TBA T116 tuyn i c lp n v tr cui 6/2, di 70m. V tr u ni 2: T ct h th s 08 xut tuyn 1 TBA T116 tuyn i c lp dc theo ng lin thn n v tr cui 08/3 di 140m.

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TKBVTC

V tr u ni 3: T ct h th s 06 xut tuyn 2 TBA T116 tuyn i c lp vt ng ri dc theo ng lin thn n v tr cui 6/3 di 115m. c. TBA T107 Tn Bnh 2 Tng chiu di tuyn: 470m Trong : Mng 1 pha 2 dy xy dng mi i c lp : 470m. * im u : Ti v tr ct s 2A, s 06 ca xut tuyn 1 v s 09 ca xut tuyn 2 TBA T107 Tn Bnh hin c. * im cui : Ti cc v tr 2A/2, 2A/6, 6/4, 6/5 v 9/2. * M t tuyn: V tr u ni 1: T ct h th s 2A xy dng mi di tuyn ng dy h th hin trng gia ct s 2 v 3 ca xut tuyn 1 TBA T107 Tn Bnh, r ra 2 tuyn, 1 hng tuyn i n v tr cui 2A/2 di 60m, 1 hng tuyn vt ng n v tr cui 2A/6 di 150m. V tr u ni 2: T ct h th s 06 xut tuyn 1 TBA T107 Tn Bnh tuyn i vt ng n 6/3 di 110m, ti y tuyn i c lp n cc im cui 6/4 di 50m v 6/5 di 30m. V tr u ni 3: T ct h th s 09 xut tuyn 2 TBA T107 Tn Bnh tuyn i c lp dc theo ng lin thn n v tr cui 9/2 di 70m. 3.2.3.5 X Sui Bc a. Bun 53 : Tng chiu di tuyn: 1355m. Gm 2 xut tuyn Trong : Mng 3 pha 4 dy i kt hp trung p ci to 1 phn : 699m Mng 3 pha 4 dy i c lp ci to mt phn : 536m. Mng 1 pha 2 dy i c lp xy dng mi: 120m. ** Phn xy dng mi : Chiu di tuyn l 120m. Trong : Mng 1 pha 2 dy i c lp xy dng mi : 120m * im u : Ti v tr ct h th s 08 xut tuyn 1. * im cui : Ti cc v tr cui 8/3 * M t tuyn: T v tr ct h th s 08 hin trng tuyn i c lp vt ng ri i dc theo ng giao thng n v tr cui 8/3, di 120m. ** Phn ci to : Chiu di tuyn l 1235m. Trong : Mng 3 pha 4 dy i kt hp trung p hin trng ci to mt phn : 699m. Mng 3 pha 4 dy i c lp ci to mt phn : 536m. + c im hin trng ca tuyn ng dy cn ci to : Tuyn ng dy cn ci to l tuyn ng dy h p thuc TBA T212 Sui Bc 2 hin trng nay chuyn sang cho TBA Bun 53 sang ti. Hin trng tuyn ng dy h th TBA T212 Sui Bc 2, nhnh r cp in cho Bun 53 do Hp tc x bn giao. T v tr C1 trng vi ct trung th TT09( v tr sang ti) i n TBA Bun 53(XDM), kt cu li 2 pha 3 dy i c lp trn ct LT10.5m v t v tr TBA Bun 53 n v tr cui s 11 kt cu li 1 pha 2 dy i c lp ct LT8.4m. Dy dn t C1 n TBA Bun 53 s dng dy 2AV70Trang

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TKBVTC

+ 1AV50 v t TBA Bun 53 n ct s 11 s dng dy 2AV50. Dy dn s dng lu nn cch in khng cn m bo, x ang s dng l x puly nay r rt. + Phng n ci to: Tn dng li ct, thay dy dn hin trng bng cp vn xon. * im u : Ti v tr trm bin p Bun 53 xy dng mi. * im cui : Ti cc v tr tr cui TT09 v ct s 11. * M t tuyn: Xut tuyn 1: T TBA tuyn i c lp kt hp trn ct trung th LT10.5m n v tr ct cui TT09 vi chiu di tuyn 699m. Xut tuyn 2: T TBA tuyn i c lp trn ct LT8.4m hin c n v tr ct cui 11 vi chiu di tuyn 536m. b. TBA T212 Sui Bc 2 : ** Phn ci to : Tng chiu di ng dy h th l 1497m, gm 2 xut tuyn Trong : Mng 3 pha 4 dy i c lp ci to 1 phn : 856m. Mng 3 pha 4 dy i kt hp ci to hon ton: 426m. Mng 3 pha 4 dy i kt hp ci to 1 phn: 215m. + c im hin trng ca tuyn ng dy cn ci to : Tuyn ng dy cn ci to l tuyn ng dy h p thuc TBA T212 Sui Bc 2 hin trng. Hin trng tuyn ng dy h th ny do Hp tc x bn giao. Kt cu li 3 pha 4 dy i c lp trn ct LT8.4m, 1 phn i kt hp trn ct trung th. Dy dn s dng dy 3AV95 + 1AV70 s dng lu nn cch in khng cn m bo, x ang s dng l x puly nay r rt. + Phng n ci to: Tn dng li ct, thay dy dn hin trng bng cp vn xon. * im u : Ti v tr TBA T212 Sui Bc 2. * im cui : Ti v tr tr cui ca li h th hin trng s 18 v TT08. Tuyn ng dy ch yu i theo ng giao thng lin thn cp in cho cc h dn dc hai bn ng. a hnh tng i bng phng. * M t tuyn: Xut tuyn 1: T TBA tuyn i c lp trn ct LT8.4m hin c n v tr cui s 18 di 777m. Xut tuyn 2: T TBA tuyn i kt hp trn ct trung th hin trng n v tr G1 (v tr G1 trng vi ct trung th TT34a cp in TBA Bun 53) sau tuyn i kt hp ct trung th cp in cho TBA Bun 53 n v tr cui trng vi v tr ct trung th s TT08 di 720m. c. TBA T210 Sui Bc 1: Hin trng tuyn ng dy h p thuc TBA T210 Sui Bc 1 trc chnh v cc nhnh r c in lc Sn Ha ci to v xy dng mi, do h s ny khng cp n. d. TBA T223 Sui Bc 3 Tng chiu di tuyn: 340m Trong : Mng 3 pha 4 dy xy dng mi i c lp : 340m.Trang

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TKBVTC

* im u : Ti v tr ct TBA T223 Sui Bc 3 hin c. * im cui : Ti v tr ct cui 2/7. * M t tuyn: V tr u ni 1: T ct TBA T223 Sui Bc 3 hin c tuyn ng dy h th xy dng mi i dc va h pha trong cng thot nc n v tr cui 2/7 di 340m. f. TBA T211 Ba V Tng chiu di tuyn: 645m Trong : Mng 3 pha 4 dy xy dng mi i c lp : 645m. * im u : Ti v tr ct h p 1a thuc TBA T211 Ba V hin c. * im cui : Ti v tr cui 1a/14. * M t tuyn: V tr u ni 1: T ct h p 1a thuc TBA T211 Ba V hin c tuyn ng dy h th xy dng mi i dc va h pha trong cng thot nc n v tr cui 1a/14 di 645m. g. TBA T103 Tn An 1 Tng chiu di tuyn: 314m Trong : Mng 3 pha 4 dy xy dng mi i c lp : 314m. * im u : Ti v tr ct h p 01 xut tuyn 1 thuc TBA T103 Tn An 1 hin c. * im cui : Ti v tr ct cui 1/6. * M t tuyn: V tr u ni 1: T ct h p 01 xut tuyn 1 thuc TBA T103 Tn An 1 hin c tuyn ng dy h th xy dng mi i dc ng giao thng lin x n v tr cui 1/6 di 264m. 3.2.3.6 X Sn Nguyn a. TBA Nguyn Trang: ng dy h p ca TBA Nguyn Trang gm 293m xy dng mi cp in cho khu vc cha c in ca thn Nguyn Trang v sang ti cho TBA T304 UB Sn Nguyn. on tuyn sang ti t ct s 01 n ct s 22 nhnh r h p TBA T304 UB Sn Nguyn cp cho thn Nguyn Trang ** Phn xy dng mi : Chiu di tuyn l 293m. Trong : Mng 3 pha 4 dy xy dng mi i c lp : 150m. Mng 3 pha 4 dy xy dng mi i kt hp : 143m. * im u : Ti v tr ct TBA Nguyn Trang xy dng mi. * im cui : Ti v tr tr cui s 04 * M t tuyn: Xut tuyn 2: T TBA tuyn i kt hp trung, h p n v tr tr TT04 di 143m. T y tuyn i c lp n v tr ct 04 cui tuyn, di 150m. ** Phn tn dng li hin trng : + c im hin trng ca tuyn ng dy hin trng :Trang

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TKBVTC

Tuyn ng dy hin trng tn dng l tuyn ng dy h p thuc TBA T304 UB Sn Nguyn cp in cho thn Nguyn Trang t ct 01 n ct cui tuyn s 22. Hin trng tuyn ng dy h th ny c kt cu li 3 pha 4 dy i c lp trn ct LT8.4m. Dy dn s dng dy cp vn xon ABC(4x70), kt cu cn mi m bo yu cu k thut. + Phng n ci to: Tn dng li ton b kt cu tuyn h p trn , chuyn sang cho TBA Nguyn Trang sang ti cho TBA T304 UB Sn Nguyn . b. TBA Nguyn An: ng dy h p ca TBA Nguyn An gm 320m xy dng mi cp in cho khu vc cha c in ca thn Nguyn An v sang ti cho TBA T331 Nguyn Cam. on tuyn sang ti t ct s 38a n ct cui tuyn nhnh r h p TBA T331 Nguyn Cam cp cho thn Nguyn An ** Phn xy dng mi : Chiu di tuyn: 320m Trong : Mng 3 pha 4 dy xy dng mi i c lp : 320m. * im u : Ti v tr ct s 03 nhnh r t ct 38a h p TBA T331 Nguyn Cam cp cho thn Nguyn An. * im cui : Ti cc v tr tr cui 3/7 * M t tuyn: Xut tuyn 1: T ct 03 tuyn ng dy h p xy dng mi i vt ng n ct 3/1, di 20m. T y tuyn i dc theo ng giao thng lin thn n ct cui s 3/7, di 300m ** Phn tn dng li hin trng : + c im hin trng ca tuyn ng dy hin trng : Tuyn ng dy hin trng tn dng l tuyn ng dy h p thuc TBA T331 Nguyn Cam cp in cho thn Nguyn Trang t ct 38a n ct cui tuyn h th. Hin trng tuyn ng dy h th ny c kt cu li 3 pha 4 dy i c lp trn ct LT 10,5m v LT8.4m. Dy dn s dng dy cp vn xon ABC(4x70), kt cu cn mi m bo yu cu k thut. + Phng n ci to: Tn dng li ton b kt cu tuyn h p trn , chuyn sang cho TBA Nguyn An sang ti cho TBA T331 Nguyn Cam . c. TBA Nguyn H: ng dy h p ca TBA Nguyn H gm 187 m xy dng mi cp in cho khu vc cha c in ca thn Nguyn H v sang ti cho TBA T305 thn 2 Sn Nguyn. on tuyn sang ti t ct s 02 n ct cui tuyn s 27 nhnh r h p TBA T305 thn 2 Sn Nguyn cp cho thn Nguyn H ** Phn xy dng mi : Chiu di tuyn: 187m Trong : Mng 3 pha 4 dy xy dng mi i c lp : 187m. * im u : Ti v tr ct s 27 xut tuyn 2 h p TBA T305 thn 2 Sn Nguyn sang ti cho TBA Nguyn H . * im cui : Ti v tr tr cui 27/4 * M t tuyn:Trang

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TKBVTC

Xut tuyn 2: -T ct s 27, xy dng mi tuyn ng dy h p i vt ng lin thn n ct 27/1, di 37m. T ct 27/1 tuyn i c lp dc ng giao thng n ct cui s 27/4, di 150m. ** Phn tn dng li hin trng : + c im hin trng ca tuyn ng dy hin trng : Tuyn ng dy hin trng tn dng l tuyn ng dy h p thuc TBA T305 thn 2 Sn Nguyn cp in cho thn Nguyn H t ct 02 n ct cui tuyn h th s 27. Hin trng tuyn ng dy h th ny c kt cu li 3 pha 4 dy i c lp trn ct LT8.4m. Dy dn s dng dy cp vn xon ABC(4x70), kt cu cn mi m bo yu cu k thut. + Phng n ci to: Tn dng li ton b kt cu tuyn h p trn , chuyn sang cho TBA Nguyn H sang ti cho TBA T305 thn 2 Sn Nguyn. d. TBA Nguyn Xun 1: Tng chiu di tuyn: 390m ch yu cp in cho thn Nguyn Xun. Trong : Mng 1 pha 2 dy xy dng mi i kt hp tr trung th : 390m. * im u : Ti v tr ct TBA Nguyn Xun 1 xy dng mi. * im cui : Ti cc v tr tr cui s 60 v 64 thuc XT473-SHo.

* M t tuyn: Xut tuyn 1: T TBA tuyn i kt hp trn ct trung th hin c thuc XT473-SHo n v tr ct trung th s 64. Chiu di tuyn 348m. Xut tuyn 2: T TBA tuyn i kt hp trn ct trung th hin c thuc XT473-SHo n v tr ct trung th s 60. Chiu di tuyn 42m.e. TBA T304 UB Sn Nguyn:

Tng chiu di tuyn: 216m ch yu cp in cho thn Nguyn Trang. Trong : Mng 1 pha 2 dy xy dng mi i c lp: 216m. * im u : Ti v tr ct s 11 h th TBA T304 UB Sn Nguyn. * im cui : Ti cc v tr cui 11/6. * M t tuyn: V tr u ni 1: T ct 11 tuyn i c lp dc theo ng lien thnn v tr cui s 11/6 di 216m.f. TBA T305 thn 2 Sn Nguyn:

Tng chiu di tuyn: 960m ch yu cp in cho thn 2. Trong : Mng 1 pha 2 dy xy dng mi i c lp: 960m. * im u : Ti cc v tr 39, 38/1, 27/1, 26/1, 23 v 22. * im cui : Ti cc v tr cui 39/4, 38/4, 27/4, 26/4, 23/3, 23/6, 22/3 v

22/5. * M t tuyn: V tr u ni 1: T ct 39 tuyn i c lp n G1 sau tip tc i dc theo ng giao thng n C1 di 150m.Trang

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TKBVTC

V tr u ni 2: Ti v tr G2 (khong gia 2 v tr ct 38 v 37) tuyn i c lp dc theo ng giao thng n C2 di 120m. V tr u ni 3: Ti v tr G3 (khong gia 2 v tr ct 27 v 26) tuyn i c lp dc theo ng giao thng n C3 di 120m. V tr u ni 4: Ti v tr G4 (khong gia 2 v tr ct 26 v 25) tuyn i c lp dc theo ng giao thng n C4 di 120m. V tr u ni 5: T ct 23 tuyn i vt ng n G5. T G6 tuyn n cc v tr cui C5 v C6 vi tng chiu di 260m. V tr u ni 6: T ct 22 tuyn i vt ng n G6 sau i dc ng n C7 di 110m. Cng t ct 22 tuyn n G7 sau i dc theo ng n C8 di 80m.g. TBA T331 Nguyn Cam:

Tng chiu di tuyn: 645m ch yu cp in cho thn Nguyn Cam. Trong : Mng 3 pha 4 dy xy dng mi i c lp: 645m. * im u : Ti v tr ct h p 33 TBA T331 Nguyn Cam. * im cui : Ti cc v tr cui 33/8 v 33/14. * M t tuyn: V tr u ni 1: T ct 33 tuyn i c lp n 33/1 sau tuyn tip tc i dc theo ng giao thng n 33/3. T 33/3 tuyn i dc ng n cc v tr cui 33/8 v 33/14, di 645m.

CHNG 4 CC GII PHP CNG NGH4.1 iu kin tnh ton4.1.1 iu kin kh hu tnh ton: iu kin kh hu tnh ton trn ng dy c ly theo c s TCVN Ti trng v tc ng TCVN 2737-1995 kt hp vi qui phm chuyn ngnh 11-TCN19-2006 v cc s liu thu thp c nh sau: TT 1 2 3 4 5 iu kin tnh ton Nhit khng kh thp nht Ti trng ngoi ln nht Qu in p kh quyn Nhit trung bnh nm Nhit khng kh cao nht Nhit khng kh (OC) 10 25 20 25 40 p lc gi (daN/m2) 0 55 5,5 0 0

4.1.2 iu kin a cht thu vn: Theo ti liu m t cc l khoan, kt qu phn tch mu c l t, kt hp vi s suy on nh gi tng ng, chia ra cc lp a cht cng trnh nh sau:Trang

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TKBVTC

a- Lp 1 (edQ): Thnh to sn tch, tn tch khng phn chia gii Tn Sinh, h t. Thnh phn l st nng n st nh mu nu sm, ct mu xm trng on di nu vng cng n na cng, xm vng bo ho nc. Ln 5 n 10% ct sn thch anh, dm granit v kt vn xt st, mm yu n cng chc trung bnh. Lp ny phn b hu khp tuyn ng dy i qua, b dy ca lp gp trong 01 H Khoan c su n 4.0 mt. Qua phn tch mu c l t cho kt qu nh sau: + m t nhin: + Khi lng ring: + Dung trng t nhin: + Dung trng kh: + Gii hn chy: + Gii hn do: + Ch s do: + c: + H s nn: + Gc ma st trong: + Lc dnh kt: + H s bo ha: + rng: + H s rng t nhin: + Cng chu ti quy c: Ww = 19.6% - 33.4% = 2.69g/cm3 - 2.78g/cm3 w = 1.59g/cm3 - 1.71g/cm3 c = 1.19g/cm3 - 1.42g/cm3 WL = 36.9% - 52.3% WP = 22.9% - 34.2% IP = 13.4 % - 19.1 % B = -0.48 0.08 a1-2 = 0.024 kg /cm2 - 0.072 kg /cm2 = 16000 - 20030 C = 0.17kg/cm2 - 0.29kg/cm2 G = 59.0% - 69.6% n = 47.2% - 57.2% e0 = 0.894 1.336 R0 = 1.8 kg/cm2 - 1.8 kg/cm2

4.1.3 Cc hin tng a cht vt l : Cc nhnh r tuyn ng dy v cc TBA i trn b mt a hnh tng i bng phng, ch yu i trong khu dn c, ng lin thn, lin x, t mu. S t i qua rung la nc, rng trng. Mc phn ct trung bnh, tuyn b che khut bi cy ci v cng trnh nh ca. Cu to ln b mt a hnh l sn phm phong ha, bo mn, tch t ca Granit, Ba Zan c ngun gc tn tch, sn tch, trm tch tui t. V ma ma nc dng ln, cc lp t tng i n nh. Cn lu nhng v tr i ni cao, sn dc ln v ma ma thng xy ra hin tng trt l mi dc c quy m nh c th xy ra. 4.1.4 Cp ng t : - ng t cp : 6-7 ( bn khoanh vng ng t Vit Nam t l :1/200.000 ). 4.1.5 in tr sut : -Dng my MC - 0.8 ca Lin X cc cc c b tr theo 4 cc i xng m rng t 1 6m. - Ngy o: T ngy 06/05 n 09 /05/2011. - Thi tit lc o: Tri va c ma . - H s ma ly : K= 1.4 - in tr sut tnh ton ca t c tnh ton xc nh theo cng thc: TT = t x Kma , t ta c kt qu tng ng c thng k trong bng ph lc sau:

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TKBVTC

BNG THNG K O IN TR SUTTn lp t o Tr s o (m) H s iu chnh theo ma Kt qa tnh ton tt(m)

STT

V tr o

Ghi ch

* 1 2 3 4 5 6 7 8

Huyn Sn Ha N.R TBA Trng Sim 2 (G4) TBA Trng Sim 2 N.R TBA Ha Sn (G3) TBA Ha Sn TBA i Dc M TBA Mt Hn TBA Phong Hu 2 TBA Lin Sn 2 1 850 1 870 1 750 1 1 1 1 1 810 780 770 910 920 1.4 1.4 1.4 1.4 1.4 1.4 1050 1134 1092 1078 1274 1288 Thi tit Khi o: ngy trc c ma Thi tit Khi o: ngy trc c ma Thi tit Khi o: ngy trc c ma Thi tit Khi o: ngy trc c ma Thi tit Khi o: ngy trc c maTrang

Thi tit Khi o: C ma trong ngy 1.4 1.4 1190 Thi tit Khi o: C ma trong ngy 1218 Thi tit Khi o: C ma trong ngy

36

D n Nng cao hiu qu nng lng khu vc nng thn tnh Ph Yn. 9 10 11 12 13 14 N.R TBA Bun 53 (G4) TBA Bun 53 TBA Nguyn Trang TBA Nguyn H TBA Nguyn An TBA Nguyn Xun 1 1 1 1 1 1 1 740 730 860 830 810 890 1.4 1.4 1.4 1.4 1.4 1.4 1036 1022 1204 1162 1134 1246

TKBVTC Thi tit Khi o: m c ma Thi tit Khi o: m c ma Thi tit Khi o: m c ma Thi tit Khi o: m c ma Thi tit Khi o: m c ma Thi tit Khi o: m c ma

4.2 ng dy trung p4.2.1 Gii php chn tuyn ng dy trung p: - ng dy trung p xy dng mi c tuyn c chn i theo ng thng nht hng ti cc v tr d kin t trm bin p chiu di tuyn l ngn nht, tuyn chn i bm theo ng giao thng, to cc gc li hp l vic n b nh ca, hoa mu, cy cng nghip l t nht v thun tin cho vic qun l vn hnh sau ny. 4.2.2 Cc gii php k thut phn in a. Kt cu li : - Cc tuyn ng dy trung th xy dng mi u ni vo khu vc li trung th hin trng ang vn hnh 22kV th xy dng li trung th vi cp in p 22kV ,mng 3 pha 3 dy. b. Ngun in: Ngun in trc tip cp cho huyn l l 472-TCSH, 473 v 475 TBA 110kV Sn Ho. c. Dy dn: Tit din dy dn c tnh chn theo iu kin mt dng in kinh t. Cc tnh ton v phn b cng sut trong tng giai on tnh tit din dy dn c thc hin chi tit trong lp D n u t v c Tng cng ty in lc Min Trung ph duyt. i vi khu vc xa bin (> 5km) dng dy nhm li thp tit din 50mm2 k hiu AC-50/8.

Thng s k thut dy dn nhm li thp:

Yu cu chung:

- Dy dn phi c b mt ng u khng c khuyt tt m mt thng nhn thy c. Cc si bn khng chng cho xon gy hay t on cng nh cc khuyt tt khc cho qu trnh s dng. Ti cc u v cui ca dy bn phi c ai chng bung xon. - Cc lp k tip nhau phi ngc chiu nhau v lp xon ngoi cng theo chiu phi, cc lp xon phi u v cht. - Cc si thp ca dy nhm li thp phi c m km chng r lp m phi bm cht khng b bong, nt, tch lp khi th un trn li th c t s gia ng knh li th v ng knh si thp l : + 4 khi ng knh si thp t 1,5 n 3,4 mm.Trang

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+ 5 khi ng knh si thp t 3,4 n 4,5 mm.

Thng s k thut ca dy nhm li thp: AC-50/8 .Mt ct danh nh (mm2) 50/8 Mt ct tnh tan (mm2) 48,2/8,04 Kt cu cp (S si x .knh) Phn Phn nhm thp 6 x 3,2 1 x 3,2 in tr nhit 20oC (/km) 0,5951 Lc ko t nh nht (daN) 1711 Khi lng cho 1 Km dy (Kg/km) 195 Chiu di ch to ( mt ) 3000

Bng c tnh c l ca dy dn : AC-50/8 .Tit din Loi T l phn dy dn Fa/Fc nhm Fa (mm2) Tit Tit din n din phn g knh tng thp dy, F Fc (mm) (mm2) (mm2) n g knh li thp (mm) ng ng Trng sut ph sut cho T ti Mun lng hoi , php , ca dy n hi , E H s gin ring bgh bcp (DaN/m, (DaN/mm n nhit 0C (Kg/m (DaN/m (DaN/m mm2) 2) ) m2) m2)

AC 50/8 6.00 48.20

8.04 56.24 9.60 3.20 0.195 29.00 11.60 0.00340 8,250.00 0.0000192

d. Cch in, ph kin: Cch in ng dy trung p Cng trnh cp in huyn Sn Ho tnh Ph Yn la chn theo cc iu kin sau: - Cp in p: 22kV. - Dy dn: dy nhm li thp AC-50/8 . - Tuyn ng dy nm trong vng nng thn trung du, min ni cch b bin > 5km, khng i qua khu vc mi trng b nhim v nhim mn. - Trong n s dng 2 loi cch in: s ng v s chui:. Cch in s dng c cc tiu chun k thut ph hp vi TCVN4759-1993 v TCVN5851-1994 v c b tr nh sau: + Cc v tr thng dng 01 cch in ng dy dn cho 01 pha. + Cc v tr gc dng 02 cch in ng t dc tuyn cho 1 pha. + Cc v tr vt ng, vt sng, dng 02 cch in ng t ngang tuyn cho 1 pha. - V tr no s dng cch in chui 22 kV (k hiu CN-22). - H s an ton c hc ca cch in c tnh ton m bo ln hn 2,7 nhit trung bnh nm khng nh hn 5oC v ln hn 1,8 ch s c ca ng dy. - Cc ph kin ng dy nh ty cch in ng, kha no u c m km nhng nng. H s an ton ca ph kin c tnh ton m bo ln hn 2,5 ch bnh thng, ln hn 1,7 ch s c. H s an ton chn cch in ng khng nh hn 2 ch bnh thng v khng nh hn 1,3 ch s c. - Ni dy trong khong ct bng ng ni c p bng thu lc, ni dy lo ti ct no bng 2 u ct km 2 bulon cho mi pha. Ni dy lo ti ct vt bng 4 kp cp 3 bulon.

Thng s k thut cch in ng 22kV:

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TKBVTC

Cch in s dng cho cng trnh vi cp in p 22KV c la chn theo cc tiu chun k thut hin hnh TCVN, IEC 383, 61952:2002 hoc cc tiu chun tng ng. - Cht lng b s mt cch in: + B mt cch in tr nhng ch gn chn kim loi phi c ph mt lp men u, mt men phi lng bng, khng c vt gn r rt, vt men khng c nt, nhn. + Men cch in khng c c vt rn nt, st, r v c hin tng nung sng. Ty s km bulng, ai c, vng m phi c m km nhng nng, chiu dy lp m khng c nh hn 80m. Cch in phi c k hiu ring trn b mt cch in (Khng b m do thi gian s dng). Thng s k thut loi s ng 24KV LinePost v Polymer yu cu bng sau: TT 1 2 3 4 5 6 7 8 9 Thng s k thut Tiu chun p dng Loi Mu ca cch in Chiu di ng r ti thiu iu kin lm vic Tn s (Hz) in p nh mc lm vic cc i KV 50 27 150 mm >530mm .V KV Thng s yu cu Polymer 24 Lp trn ct ngoi tri Thng s yu cu LinePost 24 Lp trn ct ngoi tri Xanh trng >570mm Nhit i ho 50 24 180

in p chu xung st (xung d- KVpeak ng) nh mc 1,2/50s (BIL) in p tn s cng nghip 50Hz1 pht + trng thi kh ( 1pht ) + trng thi t (10 giy ma nhn to) KV KV

85 65

>85 >65

10

in p phng in + b mt trng thi kh + b mt trng thi t KV KV mm KN > 28 13 >12,5Trang

110 85

11 12

ng knh li chu lc Lc ph hu c hc khi chu un

39


TKBVTC

Thng s k thut cch in chui treo 22kV:- Dng tiu chun TCVN, IEC 305, 471, 1109 hoc cc tiu chun tng ng. - Cht lng b mt cch in treo: B mt cch in treo khng c c cc khuyt tt sau: Cc np nhn r rt, cc tp cht l, bt h, vt rn, nt, r v v. - Cc ph kin, chi tit bng thp i km theo cch in treo phi c m km nhng nng, chiu dy lp m khng c nh hn 80m. Cc chi tit v ph kin i km phi ch to m bo ph hp vi lc ph hy c hc ca cch in. - Chui cch in treo phi m bo mt u bt vo x v mt u no () dy dn. Cc thng s k thut khc phi tha mn yu cu bng sau:TT Thng s k thut n v Yu cu Chui No Polymer Chui No Composit

1 2 3 4 5 6 7 8

in p lm vic cc i kV Chiu di ng r trn b mt (khng mm nh hn) Lc ph hy c hc ca cch in khi kN chu ko (khng nh hn) in p duy tr tn s ngun 1 pht kV trng thi kh in p duy tr tn s ngun 10 giy ma kV nhn to in p xung chu st nh mc 1,2/50(s kV peak (BIL) S cnh cch in ng knh li chu lc e. Cc bin php bo v :

27 600 70 130 100 190 >8 >18

24 640 70 120 65 200

- Ni t : Ti ct vt, ct r nhnh, ct c lp t thit b, ct trn cc on giao cho vi ng giao thng, ng dy thng tin, cc ct i chung vi ng dy h p u c ni t. Ni t dng loi cc tia hn hp, k hiu LR, gm cc cc bng thp L63x63x6 di 2,0m, ng su xung cch mt t 0,7m. Ton b h thng tip a u c m km nhng nng. Dy ni t c chn su cch mt t t nhin 0,8m. i vi ng dy trung h p i chung b tr ni t lp li dy trung tnh h p, cc v tr ni t lp li ny c ni vo h thng ni t chung ca ng dy. Cn c kt qu o in tr sut ca t th khu vc hin Sn Ha c in tr sut ca t t 1050m n 1250m. Theo quy nh 44/2006/Q-BCN ngy 8/12/2006 ca B cng nghip v vic ban hnh Quy nh k thut in nng thn th tng ng vi in tr sut ca t o c nh trn th tr s in tr ni t ca ct lp thit b khng qu 30 chn h thng tip a LR-10 v tuyn i c lp tr s ni t ca ct khng qu 50 chn h thng tip a LR-6. (Xem kt qu tnh chn tip a). - Cc bin php bo v khc: Tt c cc v tr ct u c bin cm v s th t ct t v tr d nhn thy thun tin trong vic qun l vn hnh v bo hiu cho nhn dn qua

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TKBVTC

li di ng dy. Hnh lang tuyn theo ng nghi nh 106/2005/N-CP ngy 17/08/2005. 4.2.3. Cc gii php k thut phn xy dng a. Ct : - Chiu cao ct la chn b tr cho tng v tr trn tuyn ng dy ph thuc vo c im i hnh trn c s tnh ton kinh t v m bo cc yu cu k thut theo Quy phm.

- a1. Thng s k thut Ct B tng ly tm:Ct Btng lytm c sn xut theo TCVN-5847-1994. Chiu dy b tng u ct u ct 50mm v chn ct 60mm. Btng c ct : - + Ct LT-8,4 (A, B, C), LT-10,5(A, B) v LT-12A: b tng mc M300. - + Ct LT-10,5C, LT-12(B, C): b tng mc M400. - Ct thp chu lc (ct dc) c ng knh d 16mm, c cng tnh ton ti thiu Rhxmin 2600daN/cm2 (loi CT2 tr ln ). - Cc ai c dng lp tip i c ch to bng thp theo TCVN 1765-85 v m km, b tr i xng nhau qua trc ct. - Ct c du mc chm ghi r loi ct v c ch to ti cc nh my, x nghip btng chuyn dng.-

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TKBVTC

BNG THNG S cc ch tiu k thut CT Kch thc ngoi (mm) Lc gii h n qu y v u c t (d a N) 300 400 500 540 720 900

Chiu TT K hiu ct ct (m) d i nh ct y ct

Ghi ch

1 2 3 4 5 6

LT-10,5A LT-10,5B LT-10,5C LT-12A LT-12B LT-12C

10,5 10,5 10,5 12 12 12

190 190 190 190 190 190

330 330 330 350 350 350

Thn lin Thn lin Thn lin Thn lin Thn lin Thn lin

a2. S ct: + Khong ct: i vi cc v tr ct ng dy trung p c b tr ng dy h th i kt hp, khong ct trung bnh t 40m - 50m; ng dy trung p i c lp, khong ct trung bnh t 90m - 120m. + Chiu su chn ct: Xem bn v ton th s ct trn tuyn ng dy trung p, trung - h p- Tp II: Bn v + Ct thng, vt, gc nh: s dng ct n, chiu cao 10,5m, 12m, 14m khng b tr dy no; + Ct gc ln, no gc, no hm, no cui vi khong ct nh (khong ct < 145m): s dng ct n, chiu cao 10,5m, 12m, 14m, 16m v 20m kt hp vi b tr dy no v mng no; Cc v tr khng b tr c dy no th s dng ct btng ghp i ( ct p). + Ct no gc ln, no vt, ct vt vi khong ct ln (khong ct > 145m): s dng ct cng ( ct hnh II), chiu cao 10,5m, 12m, 14m, 16m v 20m kt hp vi b tr dy no v mng no; a3. Cc yu cu chu lc ca ct:

Cc c s, tiu chun quy phm p dng trong tnh ton ct:- Qui phm trang b in s 11 TCN-18-2006 n 11 TCN-21-2006; - TCVN 2737- 1995 : Ti trng v tc ng - Tiu chun thit k. - TCVN 356 - 2005 : Kt cu b tng ct thp - Tiu chun thit k.Trang

42


TKBVTC

- TCVN 338 - 2005 : Kt cu thp - Tiu chun thit k. - TCVN 5846- 1994 : Ct in ct thp b tng ly tm - Kt cu v kch thc. - TCVN 5847-1994 : Ct in ct thp b tng ly tm - Yu cu k thut v phng php th. Cc yu cu chu lc ca ct : Ct ca DK c tnh ton vi cc ti trng khi ng dy lm vic ch bnh thng v ch s c.* Trong ch bnh thng ca DK, cc ct c tnh ton theo ch di y:

+ Dy dn khng b t, p lc gi ln nht (Qmax). + Ct gc cn phi tnh ton vi iu kin nhit thp nht (tmin) khi khong ct i biu nh hn khong ct ti hn. + Ct hm (ct no cui) tnh ton theo iu kin lc cng ca tt c cc dy dn v mt pha.* Trong ch s c ca DK,cc ct c tnh ton theo ch di y:

+ Ct trung gian mc cch in treo, ct no phi tnh lc do t dy dn, gy ra momen un, hoc mmen xon ln nht trn ct theo iu kin dy dn ca mt pha b t. + Ct no phi kim tra iu kin lp rp. * Cc ti trng c gii tc dng ln ct bao gm ti trng nm ngang v thng ng: - Ti trng theo phng ngang bao gm: + Ti trng gi ln ct: c xc nh theo cng thc Pct = *Cx*q*F (vi F l din tch mt ct) + Ti trng gi ln dy dn v dy chng st Pdy = *k1*Cx*d*l*sin 2 + Ti trng do sc cng ca dy (i vi ct no): T = F* - Ti trng theo phng thng ng: + Trng lng ct. + Trng lng chui s. + Trng lng dy. + Ti trng xy lp. - Ti trng tc ng ln kt cu trong phng php trng thi gii hn l ti trng tnh ton : Ptt = n*Ptc (n: h s qu ti). Cc loi ct chn s dng trn tuyn c th hin trong bng kt qu tnh ton ct, mng, dy no km theo (phn phc lc). Ct s dng cho tng v tr trn tuyn ng dy c th hin trn bn v mt ct dc b tr ct ( Tp II: Bn v) v bng tng k cc v tr ct trn tuyn ng dy trung p, ng dy h p (Tp I: thuyt minh). b. Mng ct, mng no: - B tr mng ct cho tng v tr ty thuc vo iu kin a cht cng trnh. - Mng ct s dng loi mng gip cp bng b tng ct thp M150 cho cc v tr ct thng dng mng MT-2T, cc v tr gc, no gc MT-3T v cc v tr no gc ct iTrang

43


TKBVTC

khng c dy no c dng mng tr i MT-1T. Khu vc t ct dung mng ging MO08T v MO-1T. - Mng no : B tng c cc mng no 1x2 mc M200 k hiu MN15-5. - S ton th cc loi mng, ct, dy no, chiu su chn mng ct th hin cc bn v s ct (Tp II Cc bn v). - Mng ct, mng no, dy no s dng cho tng v tr ct trn tuyn ng dy c th hin trn bn v mt ct dc b tr ct (Tp II- Cc bn v) v bng tng k cc v tr ct trn tuyn ng dy trung p (Tp I- thuyt minh). b1. Tnh ton la chn dng kt cu mng: Gii php tnh ton la chn cc loi mng: Cc ti trng c gii tc dng ln mng ct bao gm m men un, gy lt, lc ct v lc dc truyn ln mng theo phng X, Y trong : * Mn men un, gy lt do cc lc ngang tc dng ln mng nh lc go ln dy, ln ct, lc cng dy... * Lc ct bng tng cc lc ngang tc dng ln ct. * Lc dc bng tng cc lc bao gm trng lng ct, dy dn, x s, ph kin khc, ti trng thi cng v lc nn xung do lc cng dy no gy ra (ch c ti nhng v tr ct c b tr dy no). Mng c tnh ton trn nn n hi, khi tnh n nh (tnh chn kch thc mng), chng lt, ln, v chng nh cho mng ta p dng phng php trng thi gii hn th hai, tc theo bin dng, chuyn v ca kt cu. Do ti trng tc ng ln mng trong phng php trng thi gii hn ny l ti trng tiu chun, c th tnh ton cho tng loi mng nh sau: * Vi mng khi MT- ...: a) Tnh ton n nh ca mng, kim tra ng sut y mng theo cc iu kin sau: TCmax 1,2 Rtc TCTB 1,0 Rtc Trong : + TCmax: ng sut ln nht di y mng do ti trng ngoi gy ra (tnh c 2 phng) + TCTB: ng sut trung bnh di y mng do ti trng ngoi gy ra (tnh c 2 phng). - p lc tiu chun ca t nn: RX = (m1*m2/KTC)*(A*b* 1 + B*h* 2 + D*C) RY = (m1*m2/KTC)*(A*a* 1 + B*h* 2 + D*C) + RX , RY : Cng chu ti ca nn t di y mng theo phng X, YTrang

44


TKBVTC

+ m1 , m2 : H s iu kin lm vic ca nn t v cng trnh c tc dng qua li vi nn, vi t ct mn bo ha nc m1 = 1, 2 v m1 = 1,0 (tra TCXD 45-78). + KTC : H s tin cy khi ly mu th nghim KTC = 1,0. + A, B, D : cc h s ph thuc tr s gc ma st trong ca t. + a, b : Kch thc 2 cnh y mng. + h : Chiu su t mng. + C : Tr s lc dnh ca lp t t mng. + : T trng ca t; : h s rng ca t. + 1 : Dung trng t nhin ca lp t t mng, trong trng hp mng c t trong lp t c mc nc ngm th dng n = ( 1) / (1+ ) + 2 : Dung trng t nhin ca lp t trn y mng. b) Tnh ln ca mng : Ta dng phng php cng ln tng lp, tnh ln cho mng n su nm trong phm vi chiu dy vng nh hng (vng chu nn) tc ti tha mn ng sut y mng theo iu kin sau: - Vi nn t yu c E < 50 kg/Cm2 : 0.1 > 2 - Vi nn t c E > 50 kg/Cm : 0.2 > Trong : + : L ng sut do trng lng bn thn ca t gy ra theo phng thng ng. = + : L ng sut ph thm do ti trng ngoi gy ra di y mng. = + : L ng sut gy ln do ti trng ngoi gy ra di y mng. + i : Dung trng t nhin ca lp t th i. + hi : Chiu dy lp t th i, c ty vo tnh cht ca t nhng khng c > 0,4b. + ko : H s xc nh ng sut, tra bng ph thuc vo t s a /b v 2z/b. ln ca mng tnh theo cng thc: =( /) + : H s tnh ln ph thuc vo h s n hng pot xng , cho php ly = 0,8. c) Tnh chng lt ca mng, ta kim tra iu kin chng lt ca mng theo cng thc sau:

Pcl Pgl

k

Trong : + Pcl: kh nng chng lt ca mng ph thuc vo lai t, su chn mng, kch thc mng.Trang

45


TKBVTC

Y

+ Pgl: lc gy lt tiu chun tc dng ln mng theo phng X hoc

+ k: h s tin cy ly t 1.5 n 2.5 (ty theo v tr ct , gc, no, vt). C th nh sau: -Vi mng khi bc cp kim tra theo cng thc: [/(1+)](+) + = hi/h; = /; = (2/mh)*C*tg(45+/2) ; = / h + hi : Khong cch t tm cp th i n mt t t nhin. + hci : Chiu dy (cao) cp th i. + h : Chiu su chn mng. + H : Chiu cao t im t lc ngang n mt t t nhin. + 1/ : s tra bng ph thuc vo t s = H/h +b : Chiu rng tnh ton b. + m : H s c trng cho sc khng ca t tra bng ph thuc vo gc , hoc c th tnh theo cng thc: 2 m = (45+/2) + : Gc ni ma st ca t. + E : Sc khng ca t, c tnh: E = (m* b* h2 / 2)* + S : Tng cc lc ngang tc dng ln ct qui v nh ct. * Vi mng chng nh ( mng no) MN - ... Vi nhng v tr ct gc, no, vt thng lc ngang tc dng ln ct vt qa kh nng chu lc ca ct, nn ta dng dy no tham gia vo chu lc cng ct, mng no tham gia chng nh do lc cng ca dy no tc ng vo, ring dy no ta dng phng php trng thi gii hn th nht tnh ton, tc tnh theo kh nng bn chc ca vt liu. Ti trng tc ng ln dy no trong phng php trng thi gii hn ny c xc nh theo ti trng tnh ton, ta kim tra sc bn (kh nng chu lc ca dy no) theo cng thc: Tttdy no < [ T ] Trong : - Tttdy no: sc cng tnh ton do ti trng c gii (tng lc ngang qui v u ct) tc dng ln dy no sau khi tr i kh nng chu ti ca ct, tt nhin nhn, chia vi cc gc cn thit hp gia ct vi dy no v dy no vi dy no. - [ T ]: sc cng gii hn cho php ca tng loi dy no ph thuc vo tit din v ng sut ko t ca vt liu ch to dy no do nh sn xut a ra, trong tnh ton ny ly theo loi cp thp bn ca Lin X c [ T ] ghi r trong phn ghi ch mt s tnh cht c l ca tng loi dy no (xem kt hp tp bn v). Tnh chng nh ca mng no, ta kim tra iu kin chng nh theo cng thc sau:Trang

46


TKBVTC

Pcn k PgnTrong : Pcn: kh nng chng nh ca mng ph thuc vo loi t, su chn mng, kch thc mng... xc nh nh sau: Pcn = 0.5 * *h2 *b * + : dung trng t nhin ca lp t t mng + : su chn mng tnh n cnh mp di ca mng + b: b rng mng no + : sc bn th ng ca t, xc nh: = 1(1 ) + [2(1 )] / (3) 1= ( + ) / [ ( ) ] + : gc ma st trong ca t + , , , A, B l cc h s tra bng no - Pgn: lc gy nh tiu chun tc dng ln mng theo phng dy2 2 2 2 2

- k: h s tin cy ly t 1.5 n 2.5 (ty theo v tr ct , gc, no, vt) Gii php la chn vt liu v bin php thi cng mng: * Chn vt liu: Mng c c bng BTCT (20 x 40) vi mng khi v (10x20) vi mng no, mc t 150 n 200. Ct thp dng loi c cng Ra = 2100kg/Cm2 vi < 10 Ct thp dng loi c cng Ra = 2700kg/Cm2 vi > 10 * Bin php thi cng mng: Trc khi thi cng mng cn kim tra kch thc h mng phi m bo cc vch m ta luy theo qui nh, c bit l y mng phi bng phng v c m cht theo phng php m trng phc. Mng khi MT- ... c c ti ch, t 3 ngy sau khi c mng mi c dng ct, nn lp t h mng khi dng ct xong m bo mng c gi m tt. Mng thanh ngang, mng no MN- ... c c sn ti nh xng, sau hn 9 ngy mi vn chuyn n cng trng chn mng, i vi nhng v tr kh khn c th c mng ngay ti chn mng nhng phi ti nc bo dng BT mng lin tc trong sut 7 ngy u, sau tip tc bo dng mi ngy t nht 3 ln cho n ht ngy th 14. b2. Cc bin php bo v mng: Hu ht trn ton tuyn ng dy i qua mc nc ngm nm kh su, t l t i kh nng n mn b tng t yu n rt yu nn khng nh hng ln n n mn b tng mng.Trang

47


TKBVTC

Tuyn ng dy i qua khu vc a hnh i thp, sn thoi khng c kh nng st l t, hu ht cc v tr mng u b tr khu vc c a hnh tng i bng phng, gc dc nh, bn cnh chng ti chn gii php mng ct l mng khi MT- ... nhng v tr ny. Do nhn chung cc mng khng cn k bo v. c. Dy no : - S dng dy no TK c s phn cch cho cc v tr ct no khng b tr tip a k hiu TKP v khng c s phn cch cho cc v tr ct no c b tr tip a k hiu TKT. d. X : - Ton b x, c d trn ct c gia cng t thp hnh ma km nhng nng theo quy nh. Bu lng ai c ch tao theo TCVN 1876-76, TCVN 1896-76. - Khong cch pha trn x c thit k theo kt cu ng dy 3 pha mch n b tr kiu : + Khi dy dn b tr thng ng , khong cch pha tnh theo cng thc:D= U + 0,42 f 110 U + 0,65 f + 110

+ Khi dy dn b tr nm ngang, khong cch pha tnh theo cng thc:D=

Trong : U : in p danh nh. f : vng tnh ton. : chiu di chui cch in treo.

4.3 Trm bin p :4.3.1. Tnh ton cng sut, chn my bin p Cn c vo d bo ph ti ca cc cm dn c trong a bn x nh nu trn, kh nng s dng v pht trin ph ti ca x, cng sut cc trm bin p d kin xy dng mi v ci to trn a bn x c la chn trong khi lp D n u t v c Tng cng ty in lc Min Trung ph duyt. C th :

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48


TKBVTC

4.3.1.1 X Sn H a. TBA thn Trng Sim: - Xy dng mi 01 TBA Trng Sim 2 50kVA - 22/0.4kV cp in cho thn Trng Sim, x Sn H - huyn Sn Ha. V tr t trm trc nh Nguyn Vn Hong. - Kiu trm: treo trn 02 ct btng ly tm 10.5m xy dng mi, khng c tng ro bo v. b. TBA thn Ha Sn: - Xy dng mi 01 TBA Ha Sn 100kVA - 22/0.4kV sang ti cho TBA T306 Ngn in cp in cho thn Ha Sn, x Sn H - huyn Sn Ha. V tr t trm trng v tr ct h th s 20 hin trng thuc TBA T306 Ngn in . - Kiu trm: treo trn 02 ct btng ly tm 10.5m xy dng mi, khng c tng ro bo v. c. TBA T301 Dc i M: - Ci to nng cp TBA T301 Dc i M t 1 pha 50kVA-22/0.23kV thnh 3 pha 50kVA-22/0.4kV . - Kiu trm: treo trn 02 ct btng ly tm 12m xy dng mi, khng c tng ro bo v. * Phng n ci to: Xy dng mi ct, thay my bin p, cp trung th, cu ch t ri, thu li van, t in trm, cp l tng h p. Tn dng li h thng tip a trm bin p. d. TBA Mt Hn: - Xy dng mi 01 TBA Mt Hn 100kVA - 22/0.4kV sang ti cho TBA T501 Sui Cau ng thi cp in cho thn Mt Hn , x Sn H - huyn Sn Ha. V tr t trm gn v tr tr h th s 50 thuc TBA T501 Sui Cau trn t mu ng Din Hng. - Kiu trm: treo trn 02 ct btng ly tm 12m xy dng mi, khng c tng ro bo v. 4.3.1.2 X Sn Long a. TBA Phong Hu 2: - Xy dng mi 01 TBA Phong Hu 2 50kVA - 22/0.4kV cp in cho thn Phong Hu, x Sn Long - huyn Sn Ha. V tr t di tuyn ng dy trung th hin c gi 2 v tr ct s 84 v 85 XT473-SHo nhnh r T326 Nh th Bc H. TBA t cnh ng giao thng trn t cnh nh Dng Vn Thit. - Kiu trm: treo trn 02 ct btng ly tm 10.5m xy dng mi, khng c tng ro bo v. 4.3.1.3 X Sn Xun a. TBA Lin Sn 2 - Xy dng mi 01 TBA Lin Sn 2 50kVA - 22/0.4kV sang ti cho TBA T320 Lin Sn ng thi cp in cho thn Lin Sn, x Sn Xun - huyn Sn Ha. TBA t di tuyn ng dy trung th hin c gi 2 v tr ct s 206 v 207 XT473-SHo. TBA t trng v tr tr h th s 3A TBA T320 Lin Sn. - Kiu trm: treo trn 02 ct btng ly tm 10.5m xy dng mi, khng c tng ro bo v.Trang

49


TKBVTC

4.2.1.4 X Sui Bc a. TBA Bun 53: - Xy dng mi 01 TBA Bun 53 50kVA-22/0.4kV sang ti TBA T212 Sui Bc 2 ng thi cp in cho Bun 53 x Sui Bc - huyn Sn Ha. V tr t trng v tr tr h th 10.5 cui trc nh Y Dng. - Kiu trm: treo trn 02 ct btng ly tm 10,5m (01 ct xy dng mi), khng c tng ro bo v. 4.2.1.5 X Sn Nguyn a. TBA Nguyn Trang - Xy dng mi 01 TBA Nguyn Trang 50kVA - 22/0.4kV sang ti cho TBA T304 UB x Sn Nguyn ng thi cp in cho thn Nguyn Trang x Sn Nguyn - huyn Sn Ha. V tr t trm t trng vi tr h th s 07 TBA T304 UB Sn Nguyn. TBA t k trng tiu hc Sn Nguyn. - Kiu trm: treo trn 02 ct btng ly tm 12m xy dng mi, khng c tng ro bo v. b. TBA Nguyn An - Xy dng mi 01 TBA Nguyn An 100kVA - 22/0.4kV sang ti cho TBA T331 Nguyn Cam, cp in cho thn Nguyn An x Sn Nguyn - huyn Sn Ha. V tr t trm nm ti v tr tr h th 10.5m cui cnh ng lin thn. - Kiu trm: treo trn 02 ct btng ly tm 10,5m hin trng, khng c tng ro bo v. c. TBA Nguyn H - Xy dng mi 01 TBA Nguyn H 50kVA - 22/0.4kV sang ti cho TBA T305 thn 2 Sn Nguyn ng thi cp in cho thn Nguyn H x Sn Nguyn - huyn Sn Ha. V tr t trm ti gia 2 v tr tr h th s 14 v 15 TBA T305 thn 2 Sn Nguyn. - Kiu trm: treo trn 02 ct btng ly tm 10,5m xy dng mi, khng c tng ro bo v. d. TBA Nguyn Xun 1 - Xy dng mi 01 TBA Nguyn Xun 1 50kVA - 22/2x0.23kV cp in cho thn Nguyn Xun. V tr t trm t gia 2 v tr ct trung p s 60 v 61 thuc XT473-SHo. - Kiu trm: treo trn 01 ct btng ly tm 10,5m xy dng mi, khng c tng ro bo v. - Tn dng li MBA thu hi 22/2x0.23kV-50kVA ca TBA Dc i M (ci to nng cp) x Sn H lp t cho TBA Nguyn Xun 1 4.3.2. Cc gii php k thut phn in S ni in : - Pha trung p dng s khi ng dy - my bin p. - Pha h p dng s 01 h thng thanh ci t trong t vi 01 l tng v cc l ra i vi trm bin p 3 pha. * My bin p: My bin p 3 pha: 50kVA, 100kVA + in p: 22 2x2,5%/0,4kVTrang

50


TKBVTC

+ T u dy /Y0-11 hoc Y/Y0-12 (i vi TBA 250 kVA).

Thng s k thut my bin p ph ti:- Tiu chun ch to: TCVN-1984-1994, IEC 76 hoc cc tiu chun tng ng. - Kiu my bin p: + My bin p mt pha, ba cun dy, ngm trong du, lm mt t nhin, t ngoi tri. + My bin p ba pha, hai cun dy, ngm trong du, lm mt t nhin, t ngoi tri. - T u dy: my bin p 3 pha: /Y0-11 hoc Y/Y0-12Ghi ch: i vi MBA c 2 cp in p pha trung p v cng sut ln hn 250kVA t u dy l ()/yo-11; i vi MBA c 2 cp in p pha trung p v cng sut nh hn hoc bng 250kVA t u dy c th khc nhau mi cp in p.

- Nc phn p: i vi MBA 3 pha c 01 cp in p pha cao p, nc phn p (khng ti) pha cao p phi l 2x2,5%; My bin p ba pha:22 2x2,5%/0,4kV. - Mc cch in: MBA phi c thit k v th nghim vi mc cch in:Cp in p (kV) 0,4 22 in p th nghim tn s ngun trong thi gian 1 pht (kV rms) 3 50 in p th nghim xung st ((1,2/50s) (kV peak)) N/A 125

in p ngn mch (Un%) 4 100 310 1750 1,8 4 - Kh nng qu ti: My bin p phi m bo vn hnh qu ti ngn hn cao hn dng in nh mc theo cc gii hn sau: Qu ti theo dng in, % 30 45 60 75 100 Thi gian qu ti, pht 120 80 45 20 10 Ngoi ra, my bin p phi m bo vn hnh qu ti vi dng in cao hn nh mc ti 40% vi thi gian khng qu 6 gi trong mt ngy m trong 5 ngy lin tip. - Kh nng chu qu p: MBA m bo vn hnh qu p lin tc 5% khi ph ti khng qu ph ti nh mc v 10% khi ph ti khng qu 0,25 ph ti nh mc. - Kh nng chu ng ngn mch: MBA phi chu c dng ngn mch c tr s s gp 25 ln dng nh mc trong thi gian 4 giy (ti nc phn p c bn) m khng h hi hoc bin dng. - tng nhit: tng nhit cho php so vi nhit mi trng xung quanh. + Cun dy : 60 0C. + Lp du trn cng + C bnh du gin n : 500C. + T gin n : 550C.Trang

- Cc thng s k thut khc: Dung lng Tn hao khng Tn hao ngn MBA (kVA) ti (W) mch (W) 50 190 1000

Dng in khng ti (Io%) 1,8

51


TKBVTC

- Mc ting n: Mc ting n cho php ca my bin p khng c qu 50dB. - Du cch in : Du s dng cho my bin p phi l du mi (cha s dng), sch, c ch to theo tiu chun IEC296, c cht khng oxy ha v khng c hp cht Polychlorinated biphenyl (PCB). - S my bin p: S cao th, h th v ty s MBA phi c ch to ph hp vi dung lng MBA. Chiu di dng r s cao, h th MBA phi ln hn hoc bng 25mm/kV. i vi MBA c hai cp in p pha cao th phi c b chuyn i in gia 2 cp in p cao th lp sn trn my. - V My bin p: + V MBA c thit k m bo nng c ton b MBA v vn chuyn khng b bin dng vnh vin hoc r r du. + V MBA v np c thit k sao cho khng c hc, lm bn ngoi nc ng li. + V MBA v cc ph kin bng thp phi c bo v chng n mn. V my v cc phn ni kt bng thp phi sn qut bt tnh in sau l mt lp sn chng r, chiu dy lp sn khng c nh hn 80m. + Mi MBA phi c ti thiu 2 mc nng, cc mc nng phi c thit k m bo nng ton b MBA v c b tr sao cho cc xch nng khng nh hng n cc b phn khc (s MBA, ng phng n...) ca MBA. - Trn mi my bin p phi c b phn ch th nhit lp du trn cng MBA, van bo v p lc du. - My bin p phi m bo ch to v nng cu khng b x dch cc kt cu ca my, khi lp t khng phi rt rut my bin p. - Trn v MBA phi b tr gi lp t chng st van pha cao th MBA. c tnh k thut du cch in my bin p c cht ph gia chng oxy haTnh Cht n V Yu Cu

nht ng hc 400C -15 C im chp chy im ng c Quan st b ngoi T trng 200C Lc cng b mt 250C Tr s trung ha n mn lu hunh Hm lng nc theo khilng khng qu bn oxy ha .Tr s trung ha0

mm /s 16,5 8000 0

2

C C

135 -30 Trong, khng c cn v cht phn tn 0,895 40.10-3 0,03 Khng n mn 0,001

kg/dm3 N/m mg KOH/g %

mg KOH/g

0,02Trang

52

D n Nng cao hiu qu nng lng khu vc nng thn tnh Ph Yn. Tnh Cht n V Yu Cu

TKBVTC

. Lng cn cho php in p nh thng

% khi lng kV

0,01 50

Gc tn hao in mi tg 0,005 0 90 C v tn s t 40 60Hz - Cc bin php bo v : + Pha trung p: Bo v ngn mch v qu ti pha trung p dng cu ch t ri 22kV t ngoi tri. Bo v sng qu in p kh quyn truyn t ng dy vo trm dng chng st van 22kV cho my bin p vn hnh cp 22kV. + Pha h p: Bo v ngn mch v qu ti pha h p dng ptmt cho l tng v cc xut tuyn.

Thng s k thut cu ch t ri (FCO-22):TT 1 2 3 4 5 6 7 Thng s k thut in p nh mc in p ln nht iu kin mi trng lm vic iu kin lp t Nhit mi trng lm vic Tn s nh mc in p chu ng tn s ngun n t v gia cc cc - t (10s) - Kh (1pht) in p chu ng xung st 1,2/50(s (BIL) n t v gia cc cc Dng in nh mc Dng in ngn mch nh mc (1s) Dng ng, ct MBA khng ti Dng ng, ct ng dy khng ti Chiu di ng r Tiu chun ch to n v kV kV C Hz kVrms kVrms kV(peak) A kA A A mm/kV0

24Kv 22 24 Nhit i ha Ngoi tri 5-45 50 50 60 125 100 12 2,5 10 25 IEC 265, 282 ANSIC37.41 ANSIC37.42

8 9 10 11 12 13 14

Thng s k thut chng st van (LA-22):Hng mc in p nh mc h thng in p ln nht ca h thng Ch lm vic trung tnh H s qu p tm thi Thi gian chu qu p tm thi in p lm vic lin tc cc i (MCOV) in p chu ng tn s ngun (1pht) in p chu ng xung st 1,2/50 ms (BIL) Dng phng nh mc (8/20) .V.T kV kV s kVrms kV kV kA Yu cu 22 24,2 Ni t 1,40 10 15,3 50 125 10Trang

53


TKBVTC

Xung dng tng cao (4/10) kA 100 - Mi trm u c 01 t in h p c 02 ngn : 01 ngn b tr cc p t mt, 01 ngn b tr cc ng h o m in nng hu cng tin cho vic qun l, vn hnh sau ny. - Ni t : B tr ni t cho trm bin p: - Trung tnh my bin p, chng st van, v kim loi ca cc thit b, tt c cc kt cu kim loi khc ca trm u phi ni vo h thng ni t ca trm. - Ni t an ton, ni t lm vic v ni t chng st phi c u ni vo h thng ni t bng dy nhnh ring.

in tr ni t cho trm bin p:

Theo quyt nh s 44/2006/Q-BCN trang 48-49 tp 1+2 quy nh k thut in nng thn th tr s tng in tr ni t trong phm vi trm bin p in p s cp n 35KV yu cu: Rn 10 . Kt cu b ni t trm bin p: - H thng ni t trm s dng loi cc + tia hn hp ( k hiu NT-. . . ): Cc s dng cc thp L63x6, di 2,0 mt b tr cch nhau 4 mt, lin kt cc cc vi nhau bng thp dt - 40x4 bng hn in. u cc chn su cch mt t t nhin 0,7m v dy ni t chn su cch mt t 0,8m. Ton b tip a c m km nhng nng, Chiu dy lp km m bo 80m. - Dy ni t an ton, ni t lm vic v ni t chng st bng thp trn fi10 m km nhng nng, chiu dy lp km m bo 80m. - Lin kt gia dy ni t vi h thng ni t bng hn in. 4.3.3. Phn xy dng Cc trm bin p u dng kiu trm treo, my bin p 3 pha v cc thit b c treo trn 02 ct b tng ly tm cao 12m v 10.5m t dc tuyn khng c tng ro bo v. Cc thit b c t trn cc gi bng thp hnh, c bt cht vo ct bng bu lng v cc tm p. Mng ct trm bin p dng loi mng khi, k hiu MT-2T. Nn trm c c bng btng M200 dy 230mm.

4.4 ng dy h p :4.4.1. Kt cu - Cp in p: 0,4kV hoc 0,23kV. - Kt cu: ng dy trn khng mng 3 pha 4 dy cho li h p 3 pha, 2 pha 3 dy cho li h p 2 pha v mng 1 pha 2 dy li h p 1 pha. 4.4.2. Dy dn : - Dy dn ng dy h p c tnh chn theo iu kin tn tht in p cho php v cc Qui nh k thut in Nng thn. Dy dn h p chn dng loi dy nhm vn xon c tit din 4x95mm2 k hiu ABC(4x95)/XLPE-0,6kV, 4x70mm2 k hiu ABC(4x70)/XLPE0,6kV, 4x50mm2 k hiu ABC(4x50)/XLPE-0,6kV v 2x50mm2 k hiu ABC(2x50)/XLPE0,6kV. - Tit din dy c th cho tng tuyn i vi mi trm bin p c th hin trn bn v "S nguyn l h th".Trang

54


TKBVTC

Bng k chng loi cp vn xon sau trm bin pTT 1 2 My bin p 22/0,4kV 50kVA 22/0,4kV 100kVA Dy dn trc ABC (4x70) ABC (4x95) Dy dn nhnh r ABC (4x50), ABC (2x50) ABC (4x70), ABC (4x50), ABC (2x50) S xut tuyn 2 2/3

c tnh k thut dy dn chu lc chia u: Yu cu chung: - Tiu chun ch to: TCVN 6447:1998, AS 3560 ca c hoc DIN VDE 0211 ca c. - in p nh mc (Um): 0,6/1 kV. - in p chu ng tn s ngun (50Hz): 2kVrms trong vng 4 gi gia cc li v nc. - in p chu ng xung st 1,2/50 s: + 15kVpeak i vi mt ct li 35 mm2. + 20kVpeak i vi mt ct li >35 mm2. - Cch in XLPE . - Nhit lm vic ti a cho php: + 90oC khi vn hnh bnh thng ti dng nh mc. + 250 oC Ti dng ngn mch trong thi gian 5s.

Cu to ca cp vn xon chu lc chia u:

- Li dn in: Li cc dy dn c ch to bng cc si nhm bn thnh cc lp ng tm v c tit din hnh trn. C th hn ni dy nhng cc mi hn khng tp trung mt si. Mi hn phi u n, sau khi hn phi sa g cn thn theo ng ng knh si gc. Cc mi hn thc hin trn cng mt si th yu cu khong cch gia hai mi hn lin tip t nht l 50m. - Cch in: Cch in lm bng XLPE hm lng tro khng t hn 2% c thc hin bng phng php p, n. Cch in ny c th bc ra mt cc d dng. - Thng s k thut ca cp vn xon: + ng sut ko t nh nht i vi li cp nhm l 140N/mm2. + ng sut ko cho php ln nht ca cc li cp nhm l 70N/mm2 (c xc nh bng 50%). + Ti trng lm vic ln nht ca cp ph thuc vo ph kin kp no i km. Ph bin, ng sut ko ln nht c th truyn qua lp cch in ti cc kp no ly bng 40N/mm2. Cc thng s k thut chi tit nh sau: TT c tnh n Mt ct rut danh nh (mm2) v 16 25 35 50 70 95 120 150Trang

55

D n Nng cao hiu qu nng lng khu vc nng thn tnh Ph Yn. 1 2 3 4 5 Dng rut dn S si nhm trong rut dn ng knh rut dn - Nh nht. - Ln nht in tr mt chiu ln nht 20oC Ti ko t nh nht ca rut dn (Da trn tnh ton theo sut ko t nh nht bng 140N/mm2) B dy trung bnh nh nht ca cch in (khng o ch gn ni v ch in nhn ni) B dy nh nht ca cch in mt v tr bt k B dy ln nht ca cc in mt v tr bt k (khng o ch gn ni) ng knh ln nht ca li cp (khng o ch gn ni) Ti nh nht i vi bm dnh ca cch in. - X-90 v X-FP-90 - Ch c X-FP-90

TKBVTC 19* 9,6 10,1 0,44 3 9,8 19* 11,3 11,9 0,32 0 13,3 19* 12,8 13,5 0,25 3 16,8 19* 14,1 14,9 0,20 6 21,0

Rut dn in trn c p cht7 mm /k m kN 4,5 4,8 1,91 2,2 5,8 6,1 1,20 3,5 6,8 7,2 0,86 8 4,9 8,0 8,4 0,64 1 7,0 7 7 7

6

mm

1,3

1,3

1,3

1,5

1,5

1,7

1,7

1,7

7 8 9 10

mm mm mm kg

1,07 1,9 7,9

1,07 1,9 9,2

1,07 1,9 10,3

1,25 2,1 11,9

1,25 2,1 13,6

1,43 2,3 15,9

1,43 2,3 17,5

1,43 2,3 18,9

+ +

+ +

+ +

100 +

140 +

190 110

240 +

300 +

Ghi ch:

Du + Cha xc nh. Du * Cho php ch to theo yu cu ca khch hng.

K hiu: Mi dy dn trong b cp phi c cc k hiu phn bit. C th s dng mt trong 2 cch sau: Phng php 1: Phn bit bng nhng gn ni di, lin tc v c nh s d c, bng phng php in thch hp, dc theo chiu di cp. Mc in phi bn mu, khng phai m trong qu trnh vn hnh. Qui c nhn dng s l li c 1 gn ni cho pha A, li c 2 gn ni cho pha B, li c 3 gn ni cho pha C v li c nhiu gn ni cch u nhau cho trung tnh. Phng php 2: Phn bit bng nhng sc mu di, lin tc theo chiu di cp, b tr cch nhau 1200. Mc in phi bn mu, khng phai m trong qu trnh vn hnh. Qui c nhn dng s l li c sc mu vng cho pha A, li c sc mu xanh cho pha B, li c sc mu cho pha C v li khng c sc mu cho trung tnh. Ngoi ra trn b mt cp cn phi c cc k hiu sau y c dp chm, dp ni hay in bng mc trn b mt cch in, cch nhau ti a 1000mm - Nh sn xut : XY. - Nm sn xut : 4 ch s - Tn loi dy dn : V d NAF2Trang

56


TKBVTC

- Tit din tnh bng mm : V d 95mm2 - Cp in p nh mc : 0,6/1kV - Chiu di cn li ca cp trn tang qun dy : 250m. Cc k hiu c trn c ghi theo trnh t di y: V d: Nu nh sn xut l XY, cp vn xon sn xut nm 2011 th k hiu l: 2XY2011-NAF2-95-0,6/1kV 250m. 4.4.3. Cch in v ph kin : - Trn ton tuyn h p dng cch in v ph kin ph hp vi tng tit din cp ABC . Cc chi tit bng thp u phi c m km nhng nng chng r. B dy lp m phi m bo 80m. - Cc ph kin ca cp vn xon nh kha no cp, kha cp, kp xuyn cch in (kp rng), ng ni dy, bt u cp... c ch to ph hp vi loi tit din cp. + Ni dy trong khong ct bng ng ni dy cho cp vn xon kiu p thy lc . + Ni dy ti ct: Bng kp xuyn cch in (kp rng). + No hm cp bng kha no cp; + cp bng kha cp; - Lin kt kha no cp, kha cp vo ct bng Bu lng mc hoc Cm chi tit mc vo ct: + Bu lng mc: s dng loi Bu lng m km ng knh 16, chiu di danh nh l 250mm, 300mm v 450mm. Bu lng mc c s dng cho cc v tr ct B tng ly tm c l xuyn tm ph hp; + Gi mc cp lin kt vo ct bng B ai thp + kha ai, s dng cho cc v tr ct lp ph kin khng trng vi l xuyn tm ct. - Ti cc khong vt s dng dy AC, dy dn lin kt vo x bng chui cch in gm hoc thy tinh gm 1 bt v ph kin, k hiu l CN-0,4. 4.4.4. Ct : - S dng loi ct b tng ly tm cao 8,4m k hiu : LT-8,4A, LT-8,4C c th s dng ct b tng ly tm chu ng lc trc. - C th tng v tr ct xem bng tng k chi tit ca h s. 4.4.5. X : - Ton b x, c d trn ct c gia cng t thp hnh ma km nhng nng theo 18 TCN 04-92, lin kt bng bu lng v hn. Bu lng ai c ch tao theo TCVN 1876-76, TCVN 1896-76.

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57


TKBVTC

4.4.6. Mng : Mng ct s dng loi mng khi bng btng ct thp cho cc v tr thng, gc, no gc, no cui, k hiu MT-0H, MT-1H, MT-1H. Ngoi ra, ti cc v tr no cn c h thng dy no, mng no tng cng kh nng chu lc ca ct. 4.4.7. Cc bin php bo v : - C khong (200-250)m b tr h thng ni t lp li kt hp ni t chng st. S dng h thng ni t hn hp cc - tia b tr theo mng hnh tia. Cc ni t dng thp gc L63x63x6 di 2 mt ng su cch mt t 0.7m v c ni vi nhau bng thp dp 40x4. Ton b h thng tip a u c m km nhng nng. Cn c kt qu o in tr sut ca t th khu vc hin Sn Ha c in tr sut ca t t 1050m n 1250m. Theo quy nh 44/2006/Q-BCN ngy 8/12/2006 ca B cng nghip v vic ban hnh Quy nh k thut in nng thn th tng ng vi in tr sut ca t o c nh trn th tr s in tr ni t ca ct i vi ng dy h p i c lp, in tr ni t phi m bo khng c ln hn 50 chn h thng tip a LR-6. (xem bng tnh chn tip a tr). - Cc bin php bo v khc : Tt c cc v tr ct u c bin cm v s th t ct t v tr d nhn thy nht thun tin trong vic qun l vn hnh v bo hiu cho nhn dn qua li di ng dy. Hnh lang tuyn theo ng ngh nh 106/2005/N-CP ngy 17/08/2005.

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TKBVTC

CHNG 5 T CHC XY DNG5.1 C s lp t chc xy dng: - Bo co kt qu kho st k thut cng trnh v H s thit k bn v thi cng Cng trnh: Cp in huyn Sn Ho- tnh Ph Yn thuc D n Nng cao hiu qu nng lng khu vc nng thn tnh Ph Yn c lp 06/2011 - Quy nh k thut in nng thn QKT.NT-2006 km theo quyt nh s 44/2006/Q-BCN v vic ban hnh Quy nh k thut in nng thn. - Quy phm trang b in km theo quyt nh s 19/2006/Q-BCN v vic ban hnh quy phm trang b in. - n gi xy dng c bn chuyn ngnh xy lp ng dy ti in v trm bin p bao gm chi ph vt liu, nhn cng, my thi cng ban hnh km theo Q s 7606/Q-BCN ca B Cng Thng ngy 5 thng 8 nm 2009; - Quyt nh s: 6061/Q-BCT ngy 14/11/2008 ca B Cng Thng cng b nh mc d ton xy dng chuyn ngnh cng tc xy lp ng dy ti in trn khng. - n gi ct BTLT theo thng bo gi vt liu a phng ca tnh Qung Tr. - n gi vt liu xy dng trn th trng ti thi im thng 8 nm 2011 ca Lin S Xy dng Ti Chnh UBND Tnh Ph Yn. - Khi lng B chnh lch vt liu v vn chuyn th cng c tnh theo nh mc d ton chuyn ngnh Xy lp ng dy ti in s 6061/BCT-NL ngy 14 thng 11 nm 2008. - n gi vt t thit b in ly theo thng bo gi ca Ban QLDAL Min trung v Cng ty c phn thit b in Tun n thng 4/2011 ti Nng. - Gi cc vn chuyn theo Quyt nh s 1148/2011/Q-UBND ngy 16/8/2011 ca y ban Nhn dn tnh Ph Yn. - nh mc - n gi sn sut kt cu thp m km nng cc cng trnh in s 3783/Q-BCN ngy 15/11/2005 ca B Cng Nghip; Vn bn s 6081/CV-EVN-KTDT ngy 22/11/2005 ca Tng cng ty hng dn p dng nh mc - n gi sut kt cu thp m km nng nu trn; Vn bn s 4743/BCN-NLDK ngy 18/8/2206 ca B Cng Nghip hng dn p dng n gi sn xut kt cu thp m km; Vn bn s 4358/CV-EVN-KTDT ngy 23/8/2006 ca Tng cng ty hng dn p dng n v nh mc sn xut kt cu thp m km nng cng trnh in. B gi km, gi thp theo gi th trng thi im lp d ton. - Ranh gii gia Thit b v vt liu in theo quy nh ca B cng nghip ti vn bn s 2594/CV-KHT ngy 5 thng 7 nm 2000. - iu chnh d ton chi ph xy dng cng trnh theo thng t s 04/2010/TT-BXD ngy 26/5/2010 ca B Xy Dng; Cng vn s 616 /EVN-T ngy 01/3/2011 ca Tp on in lc Vit Nam v vic iu chnh theo mc lng ti thiu vng ti Ngh nh s 108/2010/N-CP ngy 29/10/2010 mi i vi D ton xy dng cng trnh tnh theo n gi XDCB chuyn nghnh c B Cng Thng cng b ti vn bn s 7606/BCT-NL;

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TKBVTC

- Cc chi ph qun l d n, lp d n v thit k, gim st, lp h s mi thu c tnh theo nh mc cng b theo vn bn s 957/Q-BXD ngy 29/9/2009 ca B Xy Dng. - Chi ph chung v thu nhp chu thu tnh trc c tnh theo thng t s: 04/2010/TT-BXD ngy 26/5/2010 ca B Xy Dng. - H s ph cp khu vc ly bnh qun gia quyn cc x trn ton tuyn 0,5(theo Thng t lin tch s 11/2005/TTLT-BNV-BLTBXH - BTC - UBDTMN ngy 05-01-2005 cu Lin tch B ni v, B lao ng - Thng binh v x hi - B ti chnh - U ban dn tc min ni), ph cp khng n nh: 0,2 (theo thng t 19/BLTBXH). Vn bn 533/LTBXH-LTL ngy 20/02/2008 V/v tha thun ch ph

thuyet minh goi thau 1 son hoa (hcbbtt)

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