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Nh my nhit in ph liPX T ng - iu khin

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Ngi bin son:Nguyn Vn Phng

Ngi hiu nh:

Nguyn Vn Thu

Gim c duyt

Ph Li, thng 4/2004

H THNG RELAY BO V(Dnhcho cng nhn, k s - PX Sa cha T-K)


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Gii thiu RLBV dy chuyn 2 Ph li.

Phn xng sa cha T-K.1

Gii thiu chung v h thng r le bo vca dy chuyn 2 ph li

H thng r le bo v cho cc thit b in ca dy chuyn 2 Ph Li l ccr le k thut s a chc nng. Cc r le k thut s ny c nhiu kiu loi donhiu hng sn xut, mi loi r le c mt nguyn tc hot ng ring bit v cnhng chc nng bo v khc nhau. Tu tng thit b c th m ta s dng loi rle bo v thch hp.

i vi cc thit b in chnh quan trng (nhmy pht in, my bin pchnh, my bin p t dng khi, t dng chung v cc thit b trm 220 kV) cbo v bi 2 loi r le do 2 hng sn xut. Cc r le ny cng lm vic tng

tin cy ca bo v cho cc thit b c bo v. phc v cho cng tc vn hnh thit b in, qun l vn hnh h thngr le bo v ca nh my Ph Li II chng ti xin gii thiu v cc loi r le bo vc lp t nh my.

I. bo v my pht in chnh M5 (M6)My pht in chnh c bo v bi 2 r le k thut s c k hiu trn t bo

v l: 1GMS-M3430 v 1GMS-DGP(my pht M6 2GMS-M3430 v 2GMS-DGP).1.

R le 1GMS-M3430:Kiu r le: M3430Hng sn xut: BECKWITH (M)V tr t: T 1SPX-PNLA (t bo v r le A-khi I) Phng phn phi nhiu khin trung tm.Cc chc nng bo v c s dng:- Bo v so lch dc % cun dy stato (87) chng mi dng ngn mch trong

cun dy stato my pht v cc thit b trong vng bo v.- Bo v qu t thng trong li thp stato my pht (24) Chng pht nng li thp

stato my pht do qu t thng.- Bo v qu dng th t nghch (46) bo v chng ngn mch khng i xng

(hoc t mch mt pha) cun dy stato my pht v cc thit b trong vng

bo v (vng bo v gm c pha in p 220 kV).- Bo v chng tiu th cng sut ngc cho my pht (32) Chng my pht tiu

th cng sut (P) t li. (bo v chng mt ng b).- Bo v mt kch t (40) Chng tiu th cng sut phn khng t li ca my

pht khi non kch t v hhng cun rto khi h mch kch t.- Bo v chng chm t cun dy stato theo nguyn tc qu p (59) Bo v

chng chm t cun dy stato v cc thit b in 19 kV trong vng bo v.


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- Bo v chng chm t 100% cun dy stato theo nguyn tc thp p: (27N)Chng ngn mch chm t trc tip cun dy stato v cc thit b in 19 kVtrong vng bo v.

- Bo v tr khng thp (21) Chng ngn mch nhiu pha cun dy stato mypht v cc thit b trong vng bo v ( gm c pha in p 220 kV m bochc nng chng ngn mch ngoi

- Bo v chng t chi my ct (50BF) Bo v chng t chi my ct cho myct u cc my pht 905

- Bo v chng hhng mch in p do chy cu ch (60) Chng hhng mchin p ca my pht do chy cu ch dn n mt tn hiu in p a n ccthit b bo v, o lng, iu khin. Bo v ny s a ra tn hiu cnh bong thi kho cc thit b r le bo v s dng mch tn hiu in p chngbo v tc ng nhm. (Cm bin do dng v p khng cn bng)

Tc ng ca r le:

Khi r le tc ng (ngoi tr chc nng bo v tr khng thp v bo vchng t chi my ct 905). Tn hiu u ra ca r le c a ti r le ct nhiutip im c cht hm gii tr bng tay (HEAr le ph a tip im) c k hiutrn trn t l 86G1.1 v khi ng bo v chng t chi my ct 905 c k hiu50BF.Chc nng ca r le 86G11 - Kho mch ng ca my ct 905- Ct my ct 905- Kho mch ng my ct cp in cho h thng kch t: 41AC- Ct my ct 41AC

-Gi tn hiu ti DCS (h thng iu khin l hi) Mch 1

- Gi tn hiu ti h thng bo v tua bin Mch 1- Gi tn hiu ti DCS (h thng qun l vi t) Mch 1- Gi tn hiu ti DCS (h thng iu khin l hi) Mch 2- Gi tn hiu ti DCS (h thng qun l vi t) Mch 2- Gi tn hiu ti h thng bo v tua bin Mch 2- Gi tn hiu ti h thng iu khin kch t my pht- Gi tn hiu ti thit b ghi s c my pht

Ghi ch: -Cc mch gi tn hiu i kho mch ng cc my ct c ni trctip-Cc mch tn hiu cn li c gi qua 1 kho th nghim thchin a ra hoc a vo cc chc nng ca bo v phc v cho cngvic kim tra, hiu chnh v sa cha r le-Cc tn hiu ct c a ti cun ct s 1 ca cc my ct.

+ Khi bo v chng hhng my ct 905 tc ng tn hiu a ti r le ct a tipim c cht hm phi gii tr bng tay (HEA)c k hiu 86 BFG1 v thc hin:- Kho mch ng my ct 905


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- Ct my ct 905- Kho mch ng my ct 635-A- Ct my ct 635-A- Kho mch ng my ct 635-B- Ct my ct 635-B- Gi tn hiu ti DCS (h thng iu khin l hi) Mch 1- Gi tn hiu ti DCS (h thng qun l vi t) Mch 1- Gi tn hiu ti h thng bo v tua bin Mch 1- Gi tn hiu ti DCS (h thng iu khin l hi) Mch 2- Gi tn hiu ti DCS (h thng qun l vi t) Mch 2- Gi tn hiu ti h thng bo v tua bin Mch 2- Gi tn hiu ti h thng iu khin kch t- Gi tn hiu ti thit b ghi s c my pht- Kho mch ng my ct 235

-Ct my ct 235

- Kho mch ng my ct 255- Ct my ct 255


+Khi bo v tr khng thp tc ng: u ra ca bo v s a ti tc ng r le

86U1.1 (tc ng ca bo v xem mc III.1).2. R le 1GMS-DGPKiu r le: DGPHng sn xut: GE (M)V tr t t 1SPX-PNLB (t bo v r le B khi I) phng iu khin trung tma) Chc nng ca r le

Chc nng bo v ca r le 1GMS-DGP tng t nhr le 1GMS-M3430(xem mc I.1) ch khc l r le 1GMS-DGP s dng chc nng bo v qu dngkm p 51V> thay cho bo v tr khng thp 21. Hai bo v ny khc nhau v tn

gi, nguyn tc tc ng nh

ng c cng chc nng bo v chng ngn mch chomy pht v vng tc ng s bao trm 1 phn pha 220 kV.b)Tc ng ca bo v

Khi bo v tc ng (ngoi tr cc chc nng bo v chng t chi my ctv bo v qu dng km p) u ra ca bo v a ti r le trung gian, u ra l rle a tip im c cht hm gii tr bng tay c k hiu: 86G1.2.+ Tc ng ca r le 86G1.2 tng t nhr le 86G1.1 (xem mc I.1)


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Ghi ch: Mch ct cc my ct ca r le 86G1.1 c a ti cun ct s 1Mch ct cc my ct ca r le 86G1.2 c a ti cun ct s 2.+ Khi chc nng bo chng t chi my ct 50BF tc ng tn hiu s a ti r letrung gian 62BF v a ti r le ct: 86BFG1(tc ng ca r le 86BFG1 xem mcI.1).+Khi chc nng bo v qu dng km p 51V tc ng, u ra ca bo v a tnhiu ti tc ng r le ct a tip im c cht hm gii tr bng tay c k hiu86U1.2 (tc ng ca r le 86U1.2 xem mc III.2).3. Cc bo v khc+Bo v chng chm t cun dy ro to my pht: (bo v chm t 1 im v 2im)+Cc bo v ca h thng kch t: Qu in p kch t; hhng mch kch t...+Cc bo v cng ngh ca my pht.+Cc bo v ca l v tua bin.

Cc bo v ny gi tn hiu ti cc r le ct a tip im 86G1.1 v 86G1.2 thchin bo v my pht (chc nng ca cc r le 86G1.1 v 86G1.2 xem mc I.1 vI.2).

ii.

Bo v my bin p kch t T-EX-M5My bin p kch t T-EX-M5 c bo v bi r le k thut s 1PPT-M3310Kiu r le: M-3310Hng sn xut: BECWITH (M)V tr t r le: t 1SPX-PNLA (t bo v r le A - khi 1) phng iu khin trungtm.a) Cc chc nng ca r le

-Bo v so lch dc my bin p 87. (chng ngn mch trong cun dy my binp v thit b trong vng bo v).

- Bo v qu dng pha ct nhanh c c tnh thi gian ph thuc 50/51(chngngn mch trong my bin p v cc thit b mch lc trong h thng kch t,bo v qu ti cun dy my bin p).

b)Tc ng ca bo vKhi r le tc ng, tn hiu u ra s a ti r le ct a tip im c cht

hm gii tr bng tay: 86G1.1 cho chc nng bo v so lch 87 v 86G1.2 chochc nng bo v qu dng pha ct nhanh v c thi gian ph thuc 50/51.- Tc ng ca r le ct: 86G1.1 (xem mc I.1)

-Tc ng ca r le 86G1.2 (xem mc I.2)

iii. bo v my bin p T5 (T6)my bin p T5 c bo v bi r le k thut s c k hiu 1MTX-M3310;1MTX-PVD; 1MTX-MDP v 1MTX-DTP)1. R le 1MTX-M-3310Hng sn xut: BECWITH (M)


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V tr t r le: T 1SPX-PNLA (t bo v r le A khi 1 phng iu khin trungtm.a) Cc chc nng bo v- Bo v so lch dc my bin p 87 chng mi dng ngn mch trong my bin

p v cc thit b trong vng bo v.

-Bo v so lch chm t 87N chng ngn chm t 1 pha cun dy 220 kV.

- Bo v qu t thng 24 chng pht nng li thp my bin p khi qu t thng.- Bo v chm t theo nguyn tc qu p 59N chng chm t mt pha cun dy

19 kV.- Bo v qu dng pha ct nhanh v c c tnh thi gian ph thuc 50/51 pha

cun dy 220 kV chng ngn mch cun dy 220 kV v cc thit b trong vngbo v (vng bo v m bo chng c ngn mch ngoi) v bo v qu ticun dy 220 kV.

- Bo v qu dng pha ct nhanh v c c tnh thi gian ph thuc 50/51 pha

cun dy 19 kV, chng ngn mch cun dy 19 kV v cc thit b trong vngbo v (vng bo v m bo chng c ngn mch ngoi), bo v cun dy19 kV.

b) Tc ng ca bo v:Khi cc chc nng bo v ca r le tc ng tn hiu ura ca r le a ti r le ct a tip im c cht hm gii tr bng tayh c khiu 86U1.1 v r le khi ng bo v chng t chi my ct 94U1.1.

Chc nng bo v ca r le 86U1.1 (khi r le tc ng):- Kho mch ng my ct 905- Ct my ct 905- Kho mch ng my ct kch t 41AC

-Ct my ct 41AC

- Kho mch ng my ct 635-A- Ct my ct 635A- Kho mch ng my ct 635-B- Ct my ct 635-B- Dng h thng bm du lm mt my bin p- Gi tn hiu ti DCS (h thng iu khin l) Mch 1- Gi tn hiu ti DCS (h thng qun l vi t) Mch 1- Gi tn hiu ti h thng bo v tua bin Mch 1-

Gi tn hiu ti DCS (h thng iu khin l) Mch 2- Gi tn hiu ti DCS (h thng qun l vi t) Mch 2- Gi tn hiu ti h thng bo v tua bin Mch 2- Gi tn hiu ti h thng iu khin kch t- Kho mch ng my ct 235- Ct my ct 235- Kho mch ng my ct 255


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- Ct my ct 255- Gi tn hiu ti thit b ghi s c my pht:


Chc nng ca r le 94U1.1- Khi ng bo v chng t chi my ct (bo v 1) cho my ct 235- Khi ng bo v chng t chi my ct (bo v 2) cho my ct 235- Khi ng bo v chng t chi my ct (bo v 1) cho my ct 255- Khi ng bo v chng t chi my ct (bo v 2) cho my ct 2552.

R le 1MTX-MDP

Kiu r le: MDPHng sn xut: GE (M)V tr t r le: T 1SPX-PNLB (t bo v r le B-khi 1) phng iu khin trungtm.a) Chc nng s dng ca r le:- Bo v so lch chm t 87N chng ngn mch chm t mt pha cun dy 220

kV- Bo v qu dng pha ct nhanh v c c tnh thi gian ph thuc: bo v

chng ngn mch cun dy 220 kV v cc thit b trong vng bo v (vng bov m bo c kh nng chng ngn mch ngoi)

b) Tc ng ca bo v:Khi bo v tc ng tn hiu u ra c a ti r le cta tip im 86U1.2 v r le khi ng bo v chng t chi my ct 94U1.2+chc nng ca r le 86U1.2 tng t nhr le 86U1.1(xem mc III.1), cc tnhiu ct cc my ct ca r le 86U1.2 c a ti cun ct 2 ca cc my ct .+chc nng ca r le 94U1.2 (tng t r le 94U1.1 cho trong mc III.1).

3. R le 1MTX-PVDKiu r le: PVDHng sn xut: BECWITH (M)V tr t: T 1SPX-PNLA (t bo v r le A khi 1) phng iu khin trung tm.a) Chc nng s dng ca r le:

-Bo v so lch dc: (bo v so lch dc ng dy ngn) chng ngn mch choon ng dy t u ra 220 kV ca my bin p ti trm 220 kV cng nhcc thit b nm trong vng bo v.

b)Tc ng ca bo v:- Khi bo v tc ng tn hiu u ra c a ti r le ct 86U1.1 v r le khi

ng bo v chng t chi my ct 94U1.1.


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- Chc nng bo v ca r le 86U1.1 v 94U1.1 cho phn III.1.4. R le 1MTX-DTPK hiu r le: DTPHng sn xut: GE (M)V tr t: T 1SPX-PNLB (t bo v r le B- khi 1) phng iu khin trung tm.a)

Chc nng c s dng ca r le:Bo v so lch dc (bo v so lch dc cho khi my bin p) bo v chngngn mch my bin p v tt c cc thit b nm trong vng bo v.

b)Tc ng ca bo v:Khi bo v tc ng tn hiu u ra c a ti r le ct 86U1.2 v r le khing bo v chng t chi my ct 96U1.2. (Chc nng ca r le 86U1.2 v94U1.2 xem mc III.2)

5. Cc bo v khc:- Bo v r le hi

-Bo v khi x du do p lc ln (thit b phng n lm vic)

- Bo v do tng vt du trong b iu chnh in p.- Bo v nhit cun dy cao p 220 kV tng cao- Bo v nhit cun dy 19 kV tng cao- Bo v khi nhit du tng cao- Bo v khi tt lu lng du (do thng du b thng)Cc bo v ny gi tn hiu ti r le ct 86U1.2 v r le khi ng bo v chng tchi my ct 94U1.2. (chc nng ca r le 86U1.2 v 94U1.2 xem mc III.2)

iv. bo v my bin p TD 95 (my bin p TD96 cng tng

t)My bin p TD95 c bo v bi 2 r le k thut s c k hiu 1STX-M-3310v 1STX-SR-745.1. R le 1STX-M-3310K hiu r le: M-3310Hng sn xut: BEKCWITH (M)V tr t: T 1SPX-PNLA (t bo v r le A-khi 1) phng iu khin trung tm.a) Chc nng bo v ca r le:- Bo v qu dng pha thi gian ph thuc 51 chng ngn mch pha cun dy

6,6 kV v bo v qu ti cun dy 6,6 kV

-Bo v qu dng pha ct nhanh v c thi gian phu thuc 50/51 chng ngnmch cun dy pha 19 kV v bo v qu ti

- Bo v so lch chm t 87N chng ngn mch chm t 1 pha cun dy 6,6kV

- Bo v so lch dc my bin p 87 chng mi dng ngn mch trong my binp v cc thit b trong vng bo v


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- Bo v ngn mch chm t 1 pha c thi gian ph thuc 51N bo v chngngn mch chm t 1 pha cun dy 6,6 kV v cc thit b trong vng bo v.

b)Tc ng ca bo v:- Khi bo v tc ng tn hiu u ra ca ro le a ti r le ct 86U1.1 v r le

khi ng bo v chng t chi my ct 94U1.1

-Chc nng cacc r le 86U1.1 v 94U1.1 xem mc III.1

2. R le 1 STX-SR-745Kiu r le: SR-745Hng sn xut: GE (M)V tr t: T 1SPX-PNLB (t bo v r le B khi 1) phng iu khin trung tm.a) Chc nng bo v ca r le:- Tng t nhr le 1STX-M-3310 (xem mc IV-1)b)Tc ng ca bo v:- Khi r le tc ng tn hiu u ra c gi ti r le ct 86U1.2 v r le khi

ng bo v chng t chi my ct 94U1.23. Cc bo v khc:- Bo v r le hi- Bo v khi x du do p lc ln (thit b phng n lm vic)- Bo v khi mc du trng b iu chnh in p tng vt- Bo v khi nhit cun dy 19 kV v 6,6 kV tng cao- Bo v khi nhit du tng cao.Cc bo v c a ti r le ct 86U1.2 v r le khi ng bo v chng t chimy ct 94U1.2. (chc nng ca r le 86U1.2 v 94U1.2 xem mc III.2)

v.

bo v my bin p TD-256My bin p TD-256 c bo v bi cc r le k thut s c k hiu trn bngbo v l : ORTX-M-3310; ORTX-PVD; ORTX-MDP; ORTX-DTP1. R le ORTX-M-3310Kiu r le M-3310Hng sn xut: BECKWITHV tr t r le: T OSPX-PNLA (t bo v chung) phng iu khin trung tm.a) Chc nng bo v ca r le:- Bo v qu dng pha thi gian ph thuc 51 bo v chng ngn mch pha cun

dy 6,6 kV v bo v qu ti.

-Bo v qu dng pha ct nhanh v c thi gian ph thuc 50/51 bo v chngngn mch pha cun dy 220 kV v bo v qu ti.

- Bo v chm t 1 pha cun dy 6,6 kV; 51N chng ngn mch chm t phacun dy 6,6 kV

- Bo v chm t 1 pha cun dy 220 kV; 51N chng ngn mch chm t 1pha pha cun dy 220 kV


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- Bo v so lch chm t 87N chng ngn mch chm t 1 pha cun dy 6,6kV

- Bo v so lch dc my bin p 87 chng mi dng ngn mch trong my binp v cc thit b trong vng bo v.

b)Tc ng ca bo v:Khi bo v tc ng tn hiu u ra ca r le a ti r le ct 86S1 v r le khing bo v chng t chi my ct 94S1Chc nng ca r le 86S1 (khi tc ng)- Kho mch ng my ct 237- Ct my ct 237- Kho mch ng my ct 257- Ct my ct 257- Kho mch ng my ct 630-OA- Ct my ct 630-OA

-Kho mch ng my ct 630-OB

- Ct my ct 630-OBGhi ch: -Cc mch gi tn hiu i kho mch ng cc my ct c ni trc

tip-Cc mch tn hiu cn li c gi qua 1 kho th nghim thchin a ra hoc a vo cc chc nng ca bo v phc v cho cngvic kim tra, hiu chnh v sa cha r le-Cc tn hiu ct c a ti cun ct s 1 ca cc my ct.

Chc nng ca r le 94S1 (khi r le tc ng)- Khi ng bo v chng t chi my ct (bo v 1) cho my ct 237

-Khi ng bo v chng t chi my ct (bo v 2) cho my ct 237

- Khi ng bo v chng t chi my ct (bo v 1) cho my ct 257- Khi ng bo v chng t chi my ct (bo v 2) cho my ct 2572. R le ORTX-PVDKiu r le: PVDHng sn xut: BECKWITH (M)V tr t: T OSPX-PNLA phng iu khin trung tm.a) Chc nng bo v ca r le

Bo v so lch dc (cho ng dy ngn) 87L bo v chng mi dng ngnmch trn on ng dy t u ra 220 kV ca my bin p n trm 220 kVcng nhcc thit b nm trong vng bo v.b)Tc ng ca bo v:

Khi bo v tc ng tn hiu u ra ca r le a ti r le ct 86S1 v r lekhi ng bo v chng t chi my ct 94S1.Chc nng ca r le 86S1 v 94S1 xem mc V-13. R le ORTX-MDP


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Kiu r le: MDPHng sn xut: GE (M)V tr t: T OSPX-PNLA phng iu khin trung tma) Chc nng bo v ca r le- Bo v qu dng pha ct nhanh v c c tnh thi gian ph thuc 50/51 chng

ngn mch pha cun dy 220 kV v bo v qu ti cun dy 220 kV.- Bo v qu dng chm t c c tnh thi gian ph thuc 51N chng ngn

mch 1 pha chm t pha cun dy 220 kVb)Tc ng ca bo v

Khi bo v tc ng tn hiu u ra ca r le c a ti r le ct 86S2 vr khi ng bo v chng t chi my ct 94S2.

Chc nng ca r le 86S2 tng t nhr le 86S1 (xem mc V-1). Mch ctca r le 86S2 c a ti cun ct s 2 ca cc my ct.

Chc nng ca r le 94S2 tng t nhr le 94S1 (xem mcV-1)

4.

R le ORTX-DTPKiu r le: DTPHng sn xut: GE (M)V tr t: T OSOX-PNLA phng iu khin trung tm.a) Chc nng bo v ca r le

Bo v so lch dc cho khi my bin p t dng chung 87, chng ngn chomy bin p v cc thit b trong khi my bin p t dng chung.b) Tc ng ca bo v

Khi bo v tc ng tn hiu u ra ca r le c a ti r le ct 86S2 vr le khi ng bo v chng t chi my ct 94S2 (chc nng ca r le 86S2 v

94S2 cho trong mc V-3).Cc bo v khc:- Bo v r le hi- Bo v khi x du do p lc ln (ng phng n lm vic)- Bo v khi du trong b iu chnh in p tng t ngt- Bo v khi nhit cun dy 6,6 kV tng cao- Bo v khi nhit cun dy 220 kV tng cao- Bo v khi nhit du tng caoCc bo v ny a tn hiu ti r le ct 86S2 v r le khi ng bo v chng tchi my ct 94S2

vi. bo v cc thit b in trm cao p 220 kV1. Bo v thanh ci C25Thanh ci C25 c bo v bi cc r le k thut s c k hiu -F413 v -F423a) r le -F413Kiu r le: 7VH83Hng sn xut: SIEMENS


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V tr t: T bo v thanh ci =D00+R10.1 ti phng iu khin trm 220 kVChc nng bo v ca r le: Bo v so lch thanh ci C25 (bo v 1) chng midng ngn mch trn thanh ci v cc thit b trong vng bo v.Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng my ct 215

-Ct my ct 215

- Kho mch ng my ct 235- Ct my ct 235- Kho mch ng my ct 237- Ct my ct 237- Kho mch ng my ct 236- Ct my ct 236- Khi ng r le bo v chng t chi my ct (bo v 1) cho my ct 215- Khi ng r le bo v chng t chi my ct (bo v 1) cho my ct 235

-Khi ng r le bo v chng t chi my ct (bo v 1) cho my ct 237

- Khi ng r le bo v chng t chi my ct (bo v 1) cho my ct 236Ghi ch:Mch tn hiu ct my ct c a ti cun ct s 1 ca cc my ct vc ni qua cc kho th nghim.b)R le -F423Kiu r le: MCAG34Hng sn xut: GEC-ALSTOMV tr t: T bo v thanh ci =D00+R10.2 ti phng iu khin trm 220 kV.Chc nng ca le: Bo v so lch thanh ci C25 (bo v 2), chng mi dng ngnmch trn thanh ci v cc thit b trong vng bo v.

Tc ng ca bo v:Khi bo v tc ng th thc hin cc chc nng sau:- Kho mch ng my ct 215- Ct my ct 215- Kho mch ng my ct 235- Ct my ct 235- Kho mch ng my ct 237- Ct my ct 237- Kho mch ng my ct 236-

Ct my ct 236- Khi ng r le bo v chng t chi my ct (bo v 2) cho my ct 215- Khi ng r le bo v chng t chi my ct (bo v 2) cho my ct 235- Khi ng r le bo v chng t chi my ct (bo v 2) cho my ct 237- Khi ng r le bo v chng t chi my ct (bo v 2) cho my ct 236Ghi ch:Mch tn hiu ct my ct c a ti cun ct s 2 ca cc my ct vc ni qua cc kho th nghim.


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2. Bo v thanh ci C24Thanh ci C24 c bo v bi cc r le k thut s c k hiu -F413 v -F423a) r le -F413Kiu r le: 7VH83Hng sn xut: SIEMENSV tr t: T bo v thanh ci =D00+R10.1 ti phng iu khin trm 220 kVChc nng bo v ca r le: Bo v so lch thanh ci C24 (bo v 1) chng midng ngn mch trn thanh ci v cc thit b trong vng bo v.Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng my ct 224- Ct my ct 224- Kho mch ng my ct 285- Ct my ct 285- Kho mch ng my ct 287

-Ct my ct 287

- Kho mch ng my ct 286- Ct my ct 286- Khi ng r le bo v chng t chi my ct (bo v 1) cho my ct 224- Khi ng r le bo v chng t chi my ct (bo v 1) cho my ct 285- Khi ng r le bo v chng t chi my ct (bo v 1) cho my ct 287- Khi ng r le bo v chng t chi my ct (bo v 1) cho my ct 286Ghi ch:Mch tn hiu ct my ct c a ti cun ct s 1 ca cc my ct vc ni qua cc kho th nghim.b)R le -F423

Kiu r le: MCAG34Hng sn xut: GEC-ALSTOMV tr t: T bo v thanh ci =D00+R10.2 ti phng iu khin trm 220 kV.Chc nng ca r le: Bo v so lch thanh ci C24 (bo v 2), chng mi dngngn mch trn thanh ci v cc thit b trong vng bo v.Tc ng ca bo v:Khi bo v tc ng th thc hin cc chc nng sau:- Kho mch ng my ct 224- Ct my ct 224- Kho mch ng my ct 285- Ct my ct 285- Kho mch ng my ct 287- Ct my ct 287- Kho mch ng my ct 286- Ct my ct 286- Khi ng r le bo v chng t chi my ct (bo v 2) cho my ct 224


14/213



- Khi ng r le bo v chng t chi my ct (bo v 2) cho my ct 285- Khi ng r le bo v chng t chi my ct (bo v 2) cho my ct 287- Khi ng r le bo v chng t chi my ct (bo v 2) cho my ct 286Ghi ch:Mch tn hiu ct my ct c a ti cun ct s 2 ca cc my ct vc ni qua cc kho th nghim.3.

bo v chng t chi my ct cho my ct 215S dng 2 r le k thut s c k hiu trn bng bo v l: -F411 v -F421a) R le -F411Kiu r le 7SV50Hng sn xut: SIEMENSV tr t: T bo v thanh ci: =D00+R10.1 ti phng iu khin trm 220 kV.Chc nng bo v: Bo v chng t chi my ct cho my ct 215 (bo v 1)Tc ng ca r le:Khi r le tc ng thc hin cc chc nng sau:

-Kho mch ng v ct my ct 215

- Kho mch ng v ct my ct 235- Kho mch ng v ct my ct 237- Kho mch ng v ct my ct 236- Ct cc my ct u vo thanh ci I trm 220 kV ca Ph Li IGhi ch:Mch ct c gi ti cun ct s 1 ca cc my ct.b) R le -F421Hng sn xut: SIEMENS ; Kiu r le: 7SV-50V tr t: T bo v thanh ci: D00+R10.2 ti phng iu khin trm 220 kV.Chc nng bo v: Bo v chng t chi my ct cho my ct 215 (bo v 2)

Tc ng ca r le:Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct my ct 215- Kho mch ng v ct my ct 235- Kho mch ng v ct my ct 237- Kho mch ng v ct my ct 236- Ct cc my ct u vo thanh ci I trm 220 kV ca Ph Li IGhi ch:Mch ct c gi ti cun ct s 2 ca cc my ct.4. Bo v chng t chi my ct cho my ct 224

S dng 2 r le k thut s c k hiu trn bng bo v l: -F412 v -F422a)

R le -F412Kiu r le 7SV50Hng sn xut: SIEMENSV tr t: T bo v thanh ci: =D00+R10.1 ti phng iu khin trm 220 kV.Chc nng bo v: Bo v chng t chi my ct cho my ct 224 (bo v 1)Tc ng ca r le:


15/213



Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct my ct 224- Kho mch ng v ct my ct 285- Kho mch ng v ct my ct 287- Kho mch ng v ct my ct 286

-Ct cc my ct u vo thanh ci II trm 220 kV ca Ph Li I

Ghi ch:Mch ct c gi ti cun ct s 1 ca cc my ct.b)R le -F422Hng sn xut: SIEMENS; Kiu r le: 7SV-50V tr t: T bo v thanh ci: =D00+R10.2 ti phng iu khin trm 220 kV.Chc nng bo v: Bo v chng t chi my ct cho my ct 224 (bo v 2)Tc ng ca r le:Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct my ct 224

-Kho mch ng v ct my ct 285

- Kho mch ng v ct my ct 287- Kho mch ng v ct my ct 286- Ct cc my ct u vo thanh ci II trm 220 kV ca Ph Li IGhi ch: Mch ct c gi ti cun ct s 2 ca cc my ct.5. Bo v chng t chi my ct 235S dng 2 r le bo v k thut s c k hiu trn bng bo v l -F411 v -F421R le -F411Kiu r le: 7SV50Hng sn xut: SIEMENS

V tr t: T bo v chnh: khoang 1: =D01+R1.1 ti phng iu khin trm 220kVChc nng ca r le: Bo v chng t chi my ct cho my ct 235 (bo v 1)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct cc my ct 235; 215; 255; 237 v 236 (mch ct c

a ti cun ct s 1 ca cc my ct)- Kho mch ng v ct cc my ct: 905; 635-A v 635-B c lin ng theo

dao cch ly 235-3 (mch ct c a ti cun ct s 1).R le -F421Kiu r le: 7SV50Hng sn xut SIEMENSV tr t: T bo v d phng khoang s 1: =D01+R1.2Chc nng ca r le: Bo v chnghhng my ct: 235 (bo v s 2)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct cc my ct 215; 255; 235; 236; 237 (tn hiu c a

ti cun ct s 2)


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- Kho mch ng v ct cc my ct: 905; 635-A; 635-B c lin ng theo daocch ly 235-3 (tn hiu c a ti cun ct s 2).

6. Bo v chng t chi my ct cho my ct 255.S dng 2 r le bo v k thut s c k hiu trn bng bo v l -F412 v -F422.R le -F412Kiu r le: 7SV512Hng sn xut: SIEMENSV tr t: T bo v chnh: khoang 1: =D01+R1.1 ti phng iu khin trm 220kVChc nng ca r le: Bo v chng t chi my ct cho my ct 255 (bo v 1)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct cc my ct 235; 285 (ct bng cun ct 1)- Kho mch ng v ct cc my ct: 905; 635-A v 635-B c lin ng theo

dao cch ly 235-3 ( ct bng cun ct s 1)

-Ct my ct u i din ca ng dy Bc Giang c lin ng theo dao cchly 285-7.

R le -F422Kiu r le: 7SV512Hng sn xut: SIEMENSV tr t: T bo v d phng: khoang 1: =D01+R1.2 ti phng iu khin trm220 kVChc nng ca r le: Bo v chng t chi my ct cho my ct 255 (bo v 2)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct cc my ct 235; 285 (ct bng cun ct 2)

-Kho mch ng v ct cc my ct: 905; 635-A v 635-B c lin ng theodao cch ly 235-3 ( ct bng cun ct s 2)

- Ct my ct u i din ca ng dy Bc Giang c lin ng theo dao cchly 285-7.

7. bo v chng t chi my ct cho my ct 285S dng 2 r le bo v k thut s c k hiu trn bng bo v l -F413 v -F423.R le -F413Kiu r le: 7SV512Hng sn xut: SIEMENSV tr t: T bo v chnh: khoang 1: =D01+R1.1 ti phng iu khin trm 220kVChc nng ca r le: Bo v chng t chi my ct cho my ct 285 (bo v 1)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct cc my ct 224; 255; 287; 286; 285 (ct bng cun ct

1)- Ct my ct u i din ca ng dy Bc Giang c lin ng theo dao cch

ly 285-7.


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R le -F423Kiu r le: 7SV512Hng sn xut: SIEMENSV tr t: T bo v d phng: khoang 1: =D01+R1.2 ti phng iu khin trm220 kVChc nng ca r le: Bo v chng t chi my ct cho my ct 285 (bo v 2)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct cc my ct 224; 255; 287; 286; 285 (ct bng cun ct

2)- Ct my ct u i din ca ng dy Bc Giang c lin ng theo dao cch

ly 285-7.8. bo v chng t chi my ct cho my ct 237S dng 2 r le bo v k thut s c k hiu trn bng bo v l -F411 v -F421.R le -F411

Kiu r le: 7SV50Hng sn xut: SIEMENSV tr t: T bo v chnh: khoang 2: =D02+R2.1 ti phng iu khin trm 220kVChc nng ca r le: Bo v chng t chi my ct cho my ct 237 (bo v 1)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct cc my ct 257; 215; 237; 235; 236 (ct bng cun ct

1)- Kho mch ng v ct cc my ct: 630-OA v 630-OB c lin ng theo dao

cch ly 237-3 ( ct bng cun ct s 1)

R le -F421Kiu r le: 7SV50Hng sn xut: SIEMENSV tr t: T bo v d phng: khoang 2: =D02+R2.2 ti phng iu khin trm220 kVChc nng ca r le: Bo v chng t chi my ct cho my ct 237 (bo v 2)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct cc my ct 257; 215; 237; 235; 236 (ct bng cun ct

2)- Kho mch ng v ct cc my ct: 630-OA; 630-OB c lin ng theo dao

cch ly 237-3 ( ct bng cun ct s 2)9. Bo v chng t chi my ct cho my ct 257S dng 2 r le bo v k thut s c k hiu trn bng bo v l -F412 v -F422.R le -F412Kiu r le: 7SV512Hng sn xut: SIEMENS


18/213


19/213



- Kho mch ng v ct cc my ct 287; 285; 286; 224 v 257 ( bng cun ct2)

- Ct my ct u i din ca ng dy Sc Sn 1 c lin ng theo dao cchly 287-7.

11. bo v chng t chi my ct cho my ct 236S dng 2 r le bo v k thut s c k hiu trn bng bo v l -F411 v -F421.R le -F411Kiu r le: 7SV50Hng sn xut: SIEMENSV tr t: T bo v chnh: khoang 3: =D03+R3.1 ti phng iu khin trm 220kVChc nng ca r le: Bo v chng t chi my ct cho my ct 236 (bo v 1)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct cc my ct 215; 235; 236; 237 v 256 ( bng cun ct

1)- Kho mch ng v ct cc my ct: 906; 636-A; 636-B c lin ng theo dao

cch ly 236-3 (ct bng cun ct 1).R le -F421Kiu r le: 7SV50Hng sn xut: SIEMENSV tr t: T bo v d phng: khoang 3: =D03+R3.2 ti phng iu khin trm220 kVChc nng ca r le: Bo v chng t chi my ct cho my ct 236 (bo v 2)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:

-Kho mch ng v ct cc my ct 215; 235; 236; 237 v 256 ( bng cun ct2)

- Kho mch ng v ct cc my ct: 906; 636-A; 636-B c lin ng theo daocch ly 236-3 (ct bng cun ct 2).

12. bo v chng t chi my ct cho my ct 256.S dng 2 r le bo v k thut s c k hiu trn bng bo v l -F412 v -F422.R le -F412Kiu r le: 7SV512Hng sn xut: SIEMENSV tr t: T bo v chnh: khoang 3: =D03+R3.1 ti phng iu khin trm 220kVChc nng ca r le: Bo v chng t chi my ct cho my ct 256 (bo v 1)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct cc my ct 236; 286 ( bng cun ct 1)- Kho mch ng v ct cc my ct: 906; 636-A; 636-B c lin ng theo dao

cch ly 236-3 (ct bng cun ct 1)


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- Ct my ct u i din ng dy Sc Sn 2, c lin ng theo dao cch ly286-7.

R le -F422Kiu r le: 7SV512Hng sn xut: SIEMENSV tr t: T bo v d phng: khoang 3: =D03+R3.2 ti phng iu khin trm220 kVChc nng ca r le: Bo v chng t chi my ct cho my ct 256 (bo v 2)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct cc my ct 236; 286 ( bng cun ct 2)- Kho mch ng v ct cc my ct: 906; 636-A; 636-B c lin ng theo dao

cch ly 236-3 (ct bng cun ct 2)- Ct my ct u i din ng dy Sc Sn 2, c lin ng theo dao cch ly

286-7.

13. bo v chng t chi my ct cho my ct 286S dng 2 r le bo v k thut s c k hiu trn bng bo v l -F413 v -F423.R le -F413Kiu r le: 7SV512Hng sn xut: SIEMENSV tr t: T bo v chnh: khoang 3: =D03+R3.1 ti phng iu khin trm 220kVChc nng ca r le: Bo v chng t chi my ct cho my ct 286 (bo v 1)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Kho mch ng v ct cc my ct 224; 285; 287; 286 v 256 ( bng cun ct

1)- Ct my ct u i din ng dy Sc Sn 2, c lin ng theo dao cch ly

286-7.R le -F423Kiu r le: 7SV512Hng sn xut: SIEMENSV tr t: T bo v d phng: khoang 3: =D03+R3.2 ti phng iu khin trm220 kVChc nng ca r le: Bo v chng t chi my ct cho my ct 286 (bo v 2)Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:

-Kho mch ng v ct cc my ct 224; 285; 287; 286 v 256 ( bng cun ct2)

- Ct my ct u i din ng dy Sc Sn 2, c lin ng theo dao cch ly286-7.

14. bo v dng dy Bc GiangS dng 2 r le bo v k thut s c k hiu trn bng bo v l -F414 v -F424.


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R le -F414Kiu r le: 7SA513Hng sn xut: SIEMENSV tr t: T bo v chnh: khoang 1: =D01+R1.1 ti phng iu khin trm 220kVChc nng ca r le: Bo v 1 cho ng dy- Bo v khong cch chng ngn mch nhiu pha- Bo v dng th t khng c hng chng ngn mch 1 pha- Ghi s c, xc nh v tr s c v cc chc nng khc.Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Ct cc my ct 285v 255 ( bng cun ct 1)- Khi ng bo v chng t chi my ct (bo v 1) cho cc my ct 285 v 255- Khi ng thit b t ng ng lp li cho my ct 285 v 255- Truyn tn hiu ti thit b r le bo v u i din ng dy.

R le -F424Kiu r le: EPAC 31Hng sn xut: GEC-ALSTOMV tr t: T bo v d phng: khoang 1: =D01+R1.2 ti phng iu khin trm220 kVChc nng ca r le: Bo v 2 cho ng dy- Bo v khong cch chng ngn mch nhiu pha- Bo v dng in th t khng c hng chng ngn mch 1 pha- Ghi s c, xc nh v tr s c v cc chc nng khc.Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:

-Ct cc my ct 285v 255 ( bng cun ct 2)

- Khi ng bo v chng t chi my ct (bo v 2) cho cc my ct 285 v 255- Khi ng thit b t ng ng lp li cho my ct 285 v 255- Truyn tn hiu ti thit b r le bo v u i din ng dy.15. bo v ng dy Sc Sn 1S dng 2 r le bo v k thut s c k hiu trn bng bo v l -F414 v -F424.R le -F414Kiu r le: 7SA513Hng sn xut: SIEMENSV tr t: T bo v chnh: khoang 2: =D02+R2.1 ti phng iu khin trm 220kVChc nng ca r le: Bo v 1 cho ng dy- Bo v khong cch chng ngn mch nhiu pha- Bo v dng th t khng c hng chng ngn mch 1 pha- Ghi s c, xc nh v tr s c v cc chc nng khc.Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:


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- Ct cc my ct 287v 257 ( bng cun ct 1)- Khi ng bo v chng t chi my ct (bo v 1) cho cc my ct 287 v 257- Khi ng thit b t ng ng lp li cho my ct 287 v 257- Truyn tn hiu ti thit b r le bo v u i din ng dy.R le -F424Kiu r le: EPAC 31Hng sn xut: GEC-ALSTOMV tr t: T bo v d phng: khoang 2: =D01+R1.2 ti phng iu khin trm220 kVChc nng ca r le: Bo v 2 cho ng dy Sc Sn 1- Bo v khong cch chng ngn mch nhiu pha- Bo v dng in th t khng c hng chng ngn mch 1 pha- Ghi s c, xc nh v tr s c v cc chc nng khc.Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:

-Ct cc my ct 287v 257 ( bng cun ct 2)

- Khi ng bo v chng t chi my ct (bo v 2) cho cc my ct 287 v 257- Khi ng thit b t ng ng lp li cho my ct 287 v 257- Truyn tn hiu ti thit b r le bo v u i din ng dy.16. bo v ng dy Sc Sn 2S dng 2 r le bo v k thut s c k hiu trn bng bo v l -F414 v -F424.R le -F414Kiu r le: 7SA513Hng sn xut: SIEMENSV tr t: T bo v chnh: khoang 3: =D03+R3.1 ti phng iu khin trm 220

kVChc nng ca r le: Bo v 1 cho ng dy- Bo v khong cch chng ngn mch nhiu pha- Bo v dng th t khng c hng chng ngn mch 1 pha- Ghi s c, xc nh v tr s c v cc chc nng khc.Tc ng ca r le: Khi r le tc ng thc hin cc chc nng sau:- Ct cc my ct 286v 256 ( bng cun ct 1)- Khi ng bo v chng t chi my ct (bo v 1) cho cc my ct 286 v 256- Khi ng thit b t ng ng lp li cho my ct 286 v 256-

Truyn tn hiu ti thit b r le bo v u i din

ng dy.R le -F424Kiu r le: EPAC 31Hng sn xut: GEC-ALSTOMV tr t: T bo v d phng: khoang 3: =D03+R3.2 ti phng iu khin trm220 kVChc nng ca r le: Bo v 2 cho ng dy Sc Sn 2


23/213



- Bo v khong cch chng ngn mch nhiu pha- Bo v dng in th t khng c hng chng ngn mch 1 pha- Ghi s c, xc nh v tr s c v cc chc nng khc.Tc ng ca r le : Khi r le tc ng thc hin cc chc nng sau:- Ct cc my ct 286v 256 ( bng cun ct 2)

-Khi ng bo v chng t chi my ct (bo v 2) cho cc my ct 286 v 256

- Khi ng thit b t ng ng lp li cho my ct 286 v 256- Truyn tn hiu ti thit b r le bo v u i din ng dy.

vii. bo v cc thit b t dng 6,6 kV1. bo v thanh ci t dng 6,6 kV 5-BA (tng t cho cc thanh ci 5-BB; 6-BA; 6-BB; O-BA; O-BB)thanh ci 6,6 kV 5-BA c bo v bi r le MFAC1.1Gii thiu v r le MFAC

Kiu r le: MFAC

Hng sn xut: GEC-ALSTOMV tr t: T u vo thanh ci 5-BA (t 635-A)

1.2Chc nng ca r le: Bo v so lch thanh ci 5-BA (87B) chng mi dngngn mch trn thanh ci.

1.3

Tc ng ca r le: Khi bo v tc ng, tn hiu u ra ca r le s i ct ttc cc my ct u vo thanh ci v kho mch ng ca cc my ct .

2. Bo v t my ct u vo 635-A (tng t cho cc t u vo 635-A; 635-B; 630-A; 630-B).Cc thit b 6,6 kV phn on 635-A c bo v bi r le k thut s SR-750 t

ti t u vo 635-A2.1

Gii thiu r le SR-750Kiu r le: SR-750Hng sn xut: GEV tr t: T cp in u vo 635-A2.2chc nng ca r le:- Bo v chng in p thp trn thanh ci 27: chng st p trn thanh ci- Bo v chng qu dng pha c c tnh thi gian ph thuc 51: chng ngn

mch trn thanh ci v cc ph ti 6,6 kV- Bo v qu dng chm t c c tnh thi gian ph thuc: chng ngn mch 1

pha trn thanh ci v cc ph ti 6,6 kV 51N- Ho ng b: Ho ng b khi chuyn i ngun cp cho thanh ci t my t

dng khi sang t dng chung hay ngc li.2.3

Tc ng ca bo v:- Khi bo v in p thp 27 lm vic s ct tt c cc ng c 6,6 kV u vo

thanh ci.


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- Khi bo v qu dng pha v qu dng chm t tc ng s ct my ct cpin u vo cho phn on 6,6 kV: (my ct 635-A v kho mch ng).

3. bo v my bin p t dng 6,6/0,42 kV 5T1 (p dng tng t cho ccmy bin p 6T1; OTB1; OTB2)My bin p t dng 5T1 c bo v bi r le k thut s SR-745.3.1 R le SR-745Kiu r le: SR-745Hng sn xut: GEV tr t: T cp in cho my bin p 5T1 (B-5T1)3.2Chc nng ca r le:- Bo v qu dng pha pha 6,6 kV ct nhanh c c tnh thi gian ph thuc

50/51: Chng ngn mch pha 6,6 kV v 0,4 kV; Bo v qu ti pha 6,6 kV- Bo v qu dng chm t pha 6,6 kV c c tnh thi gian ph thuc 51N

chng ngn mch 1 pha pha 6,6 kV-

Bo v qu dng chm t pha 0,4 kV c c tnh thi gian ph thuc 51Nchng ngn mch 1 pha pha 0,4 kV- Bo v so lch dc my bin p 87 chng ngn mch cho my bin p v cc

thit b trong vng bo v.3.3Tc ng ca bo vCt my ct cp in u vo 6,6 kV: B-5T1 v my ct u ra 0,4kV A-5T13.4

Cc bo v khc:Bo v nhit cun dy my bin p: Khi nhit cun dy my bin p cao qutr s t s tc ng bo v i ct cc my ct: B-5T1 v A-5T1.4. Bo v my bin p t dng 6,6/0,42 kV OTA1(p dng tng t cho

cc my bin p OTA2, NLA-T1; NLA-T2; NLD-T1; LB-5T1; LB-5T2; LB-6T1;LB-6T2)My bin p OTA1 c bo v bi r le SR-7504.1 R le SR-750Kiu r le: SR-750Hng sn xut: GEV tr t: T B-OTA14.2Chc nng bo v ca r le:- Qu dng chm t pha 0,42 kV 51N, chng ngn mch 1 pha pha 0,42 kV- Qu dng chm t ct nhanh pha 6,6 kV 50G, bo v ngn mch 1 pha pha

6,6 kV- Bo v qu dng th t nghch pha 6,6 kV chng ngn mch khng i xng

pha 6,6 kV- Bo v qu dng pha pha 6,6 kV c thi gian ph thuc chng ngn mch v

qu ti pha 6,6 v 0,42 kV.4.3Tc ng ca r le:Ct my ct: B-OTA1 v A-OTA1


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4.4

Cc bo v khc:- Bo v khi nhit cun dy my bin p tng cao- Cu ch bo v chng ngn mch pha 6,6 kV5. Bo v t ti cc t cung cp in cho cc phn on 6,6 kV: NLB-B (tng t cho cc t FGD-B5; FGD-B6; TX-B1; TX-B2; XLN-B1; XLN-B2)Cc t ny c bo v bi r le SR-7505.1 R le SR-750Kiu r le: SR-750Hng sn xut: GEV tr t: T cp in cho phn on NLB-B5.2

Chc nng ca r le- Bo v qu dng chm t c thi gian ph thuc 51N, chng ngn mch mt

pha- Bo v qu dng pha c thi gian ph thuc chng ngn mch v qu ti.

5.3

Tc ng ca r leCt my ct cp in cho NLB-BGhi ch: Cc phn don FGD-B5; FGD-B6; TX-B1; TX-B2 cn c bo v bicc cu ch chng ngn mch nhiu pha.6. Bo v cc ng c 6,6 kV: (bm tun hon, my nghin, bm cp, qutgi th cp).Cc ng c ny ny c bo v bng r le SR-469 do hng GE sn xut, n ct ti t 6,6 kV cp in cho ng c.Chc nng ca r le:- Bo v qu dng pha ct nhanh c thi gian ph thuc 50/51, chng ngn mch

v qu ti cho ng c.- Bo v dng in th t nghch 46, chng ngn mch khng i xng v t 1

pha cun stato v cp.- Bo v qu dng chm t ct nhanh 50G, chng ngn mch 1 pha cun dy

stato v cp.- Bo v so lch dc 87, chng ngn mch cun dy stato v cc thit b trong

vng bo v.Cc bo v khc: Bo v khi nhit cun dy ca ng c tng cao: tc ng ict my ct 6,6 kV cp in cho ng c.Tc ng ca r le: Ct my ct 6,6 kV cp in cho ng c.

7.

bo v cho cc ng c:(Bm ngng; qut gi s cp; bm nc lnh tdng; bm nc th; ng c my nn kh).

Cc ng c ny ny c bo v bng r le SR-469 do hng GE sn xut, n ct ti t 6,6 kV cp in cho ng c.Chc nng ca r le:


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27/213

R Le Bo V My Bin p M-3310

Phn xngT-K26

R le bo v my bin p m-3310

1. Gii Thiu Tng Quan : R le M-3310l mt b vi s l s dng cng ngh s l tn hiu bng k

thut s bo v my bin p(MBA) cao th thot khi cc tn s v in pbt bnh thng, cc s c bn trong cun dy MBA, s c h thng, dng inth t nghch, qu ti, nhiu lon do qa kch t (V/Hz) .Ngoi ra M-3310cntrang b bo v rng cho h thng do li hhng my ct,sa thi ph ti,s cthanh ci,ngoi ra cn bo v d phng cho rle k tht s bo v u cp ngun. 1.1) Cc chc nng bo v: M-3310 cung cp 17 chc nng rle bo v(tn gi c rt ra t tiuchun ANSI/IEEE , v cc con s chc nng thit b ca cc h thng in tiu

chun) : 24 Bo v qu kch t V/Hz. 27 Bo v km p pha. 46 Bo v qu dng th t nghch. 50W1 Bo v qu dng pha ct tc thi. 50W2 Bo v qu dng pha ct tc thi 50BF Bo v chng hhng my ct. 50G Bo v qu dng trung tnh ct tc thi. 51W1 Bo v qu dng pha ct nhanh cthi gian theo c tnh nghch. 51W2 Bo v qu dng pha ct nhanh cthi gian theo c tnh nghch.

50NW1 Bo v qu dng dct nhanh cthi gian theo c tnh nghch. 50NW2 Bo v qu dng dct nhanh cthi gian theo c tnh nghch. 51G Bo v qu dng trung tnh ct nhanh c thi gian theo c tnhnghch. 59G Bo v qu in p trung tnh. 81U Bo v tn s thp. 87 Bo v dng so lch pha. 87GD bo v so lch chm t. 1.2) Ty chn cu hnh:

R le M-3310

c mua v l mt h thng bo v MBA

c cu hnhy vi tt c cc chc nng bo v k trn, hoc xem nhl mt h thng cs vi cc chc nng thm vo theo yu cu pht trin rng h thng nynhm tho mn cc nhu cu ng dng c th. 1.3)Cc nhm a im t: M-3310 h tr 4 nhm im t .Chc nng ny cho php ngi s dngnh r cc nhm im t cho cc cu hnh h thng in khc nhau .Cc nhmchnh nh ny c th c chuyn i bng tay hoc thng qua kt ni thngtin, giao din ngi v my ,hoc cc u vo tip im.

1.4)o lng :


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Phn xngT-K28

s c; la chn nhm im t; hoc tc ng mt hoc nhiu u ra.Ccu vo trng thi l cc tip im kh v c tm t bn trong ti (ni ti)ngun cp 24Vdc. thng bo trng thi my ct bng n LED mt trc,th tip im u vo trng thi INPUT1 phi c ni ti tip im trng thi

ca my ct 52b.1.10)Cc tip im u ra: C 8 tip im u ra c th lp trnh c(6 tip im dng "a" ; 2tip

im dng "c") ,1 tip im u ra bo ng ca ngun cp (dng "b") ,1 tipim u ra bo ng t kim tra (dng "c").

*Ch thch:tip im dng "a" :l tip im thng m . tip im dng "b" :l tip im thng ng . tip im dng "c" :l tip im ni r nhnh gia tip im "a"

v "b".

Tt c cc tip im ny

c nh gi theo tiu chun ca hip hi in -in t M ANSI/IEEE C37.90-1989 i vi tc ng ct : xung dng 30Akhong 2 giy (chu ng), Dn c 8A(lin tc), ngt mch 6A @ 120Vac ;ngt mch 0,1A @ 125Vdc. Bt k mt chc nng no cng c th c lptrnh ring l tc ng mt hoc nhiu tip im trong 8 tip im u ra cth lp trnh c ny.

1.11)Bng iu khin v Cc n LED hin th Trng thi: n LED "RELAY OK" c iu khin bi b v l ca M-3310 .Khi n

ny sng nhp nhy mu xanh s bo cho bn bit chu trnh lm vic chnhxc ca my tnh siu nh, n ny cn c th lp trnh cho sng lin tcc.

n LED "BRKR CLOSED" (Breaker Closed) s sng mu khi my ct

ng (khi tip im 52b m) .

n LED "OSC TRG" (Oscillograph Trigger) sng ln thng bo d liudng sng dao ng c ghi hon chnh vo b nh ca rle.

Khi m bt k mt chc nng no ca rle tc ng, th n LED thng bo

s c tng ng s sng ln. n LED "PS1" v "PS2"(Power Supply) sng lin tc nu nhc ngun

cp n cho rle v ngun in ny lm vic tt.

n LED "TIME SYNCH"s sng mu xanh khi m tn hiu c hiu lcca IRIG_Bc p dng v thc hin song vic ho ng b thi gian.

n LED t chun on "DIAG LED" (Diagnostic LED) s sng nhp

nhy khi sut hin li t kim tra c th khm c.n LED ny s nhy sm ca li .V d : s m ca li l 32 ,n LED s nhy 3 ln ,sau dng mt cht ,ri li nhy 2 ln na ,ri li dng mt lc lu v li lp li tu.Ngoi ra s m ca li cn c hin th trn mn hnh.

1.12)Kt ni thng tin:


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Phn xngT-K29

Cc cng kt ni thng tin bao gm:Mtcng RS-232(COM2) mt sauRle, Mt cng cch ly khng nhn c RS-485(COM3) ,V mt cng RS-232(COM1) mt trc Rle.

Giao thc kt ni thng tin thc hin kt ni thng tin phi ng b ,c

truyn theo tng byte , ni tip nhau,v cung cp cc chc nng sau (khi mGiao thc ny c s dng vi 'Gi phn mm kt ni thng tin IPScom

tng thch vi WindowsTM) :

H tr giao thc MOSBUS v BECO2200. Sa i v thm d im t. Thng tin v thng bo s c ct c km du hiu thi gian cho 32 s

kin gn nht.

o lng thi gian thc ca tt c cc i lng c o.

Ti xung tt c d liu dng sng dao ng in c ghi (Khng

thc hin c vi giao thc MOSBUS ).1.13)Chc nng ho ng b thi gian IRIG-B : M-3310 chp nhn mt tn hiu u vo c iu bin(u ni BNC

:c mt chn cm) hoc c gii iu bin(Cc chn dnh ring u ni ktni thng tin). Thng tin v s ho ng b thi gian ca IRIG-B c s dng hiu chnh chnh xc Lch/ng h ti ch . V to ra phn gii cao hncho cc thng bo s c v s nh du thi gian cho sng dao ng in.

1.14)Khi chc nng thng bo s c: Khi chc nng thng bo s c c th tu chn ny cung cp 24 n

LED thng bo s c v 8 n LED hin th cho u ra : . 24 n LED thng bo s c:Lc bnh thng th khng sng. Khi mtchc nng ca M-3310 tc ng th n LED tng ng vi nguyn nhn ca tcng s sng ln v duy tr cho n khi RESET lai. Cc thng bo s c cth c reset (ci t li ch ) nh nt n "TARGET RESET" Nu nhcctnh trng gy ra tc ng c loi b song.

.8 n LED hin th ca u ra :hin th trng thi hin ti ca 8 tipim u ra lp trnh c OUT1 -OUT8.n tng ng s sng ln ch cn khibt k mt u ra c khi ng. Khi ny lin kt rt nhanh vi Rle bo vmy bin p M-3310.

Truy cp vo Thc n "VIEW TARGET HISTORY" Bn s ly cthng tin chi tit v nguyn nhn ca 32 tc ng gn nht c gi li trong bnh ca RLe .

Nu nv nhnt "TARGET RESET" th tt c cc n LED s sngln trong chc lt (Cung cp phng tin th nghim ) v cho php ci t lich cho (cc) n LED ca thng bo s c nu nhcc tnh trng gy ratc ng c loi b song.

Nu nv gint "TARGET RESET" s hin th trng thi khi nghin thi ca cc chc nng ca M-3310 trn cc n LED thng bo s c .


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Phn xngT-K32

POWER ON SELF TESTXXXXXXXXXXXXXXXX

Self-tests and LED test

POWER ON SELF TESTPASS

Previous target LED's

BECKWITH ELECTRIC CO. M3310

BECKWITH ELECTRIC CO.D-0042V01.OO.35

BECKWITH ELECTRIC CO.SERIAL NUMBER XXXX

BECKWITH ELECTRIC CO.03-JAN-1998 09:00:00:000

A


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Phn xngT-K33

Dng m phng cc mn hnh hin th

TARGET03-JAN-1998 09:00:00:000

TARGET 02

OPTIONAL

YES

A

YES

NO

TripRecorded?

BUTTONPRESS ?

ENTER ACCESS CODE. 0

LEVEL #XACCESS GRANTED


CodeCorrect ?

NO

VOLTAGE RELAYVOLT curr freq v/hz ext

LEVEL #XACCESS GRANTED


TARGET

27 POS SEQ UNDERVOLTAGE

BUTTONPRESS ?

EXIT

OTHER


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R le bo v my pht- M3430

Phn xng T-K 34

r le bo v my pht : m3430

A.Gii thiu chung:

Ti liu r le bo v my pht : m3430 gii thiu cho ngi sdng cc ni dung sau:

1. Gii thiu v R le M3430

2. ng dng ca r le bo v my pht3. Vn hnh r le (bng giao din t mt trc r le )

4.

Vn hnh r le (bng my tnh vi phn mm: M3800 IPS Com)5. Lp t r le

6. Kim tra r le

7. Cc ph lc, cc bng d liu, cc hnh v

B- Ni dung c bn ca ti liu r le bo v my pht :

Chng 1:

Gii thiu v r le bo v M3430

1. R le bo v my pht 3430-3411 l r le k thut s gm c 15 chc nng

bo v xem bng 1.1 bit c th tng chc nng bo v ca r le)R le

M.3430 dng bo v my pht trnh hin tng khc thng (cao hoc thp

) ca in p, tn s, hhng bn trong cun dy, hhng h thng, dng

in th t nghch, qu nhit, cng sut ngc, mt kch t v qu kch t

(V/Hz) pht hin h

hng cu ch mch in p, bo v chng h

hng myct.

- N c 6 tip im u vo c th lp trnh c kho bt k mt chc nng

bo v no v/ hoc khi ng b ghi dao ng. Bt k mt chc nng bo

v hoc tip im u vo no u c th lp trnh ring bit (ring r) a

ti tc ng mt hoc nhiu tip im u ra bt k ca 8 tip im u ra lp

trnh c.


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Phn xng T-K 35

- Chc nng bn trong ca r le M3430 a ra bng 1.1. K hiu ca cc chc

nng l a theo tiu chun ca : ANSI/IEEE Std. C37.2-1991;

(S gn cho cc chc nng l da theo chun ca h thng in)

-Vi modul: M.3931 MMI (Man Machine Interface). R le M.3430 thc hinkh nng o lng ti ch, cc i lng khc nhau bao gm in p pha, in

p trung tnh, dng in pha, dng in trung tnh, cng sut thc (P), cng

sut phn khng (Q), h s cng sut v o tng tr.

- R le M.3430 cung cp thng tin v s c m r le tc ng cho 32 s kin

gn nht (cui cng)

- R le M.3430 gm c nhng kh nng: t kim tra, t hiu chnh v chun

on.

-T thit b MMI, tt c cc chc nng ca r le u c th ci t hoc kimtra ti ch, theo menu vn hnh v mn hnh LCD gm 2 dng, 24 k t.

- Cc tip im u ra ca r le c th thc hin chc nng l tip im i ct

v/ hoc tip im bo ng. Cc LED dng cho mch thng bo (tn hiu)

thc hin xem bng mt cc chc nng bo v tc ng. ( nu c la

chngiao din ngi dng ti ch c thc hin thng qua cc phm bm v

mt mn hnh hin th mt trc ca r le.

- C 3 cng I/O ni tip thc hin kh nng thng tin vi r le t xa.

-Mt ngun cp theo modul chuyn mch cp in cho r le M.3430 vi inp ngun cp khc nhau c yu cu cho vn hnh. (Mt ngun cp d

phng c sn nhl mt t chn)

- Cng giao din ni tip : COM1 v COM2 l cc cng thng tin c cu hnh

theo tiu chun: 9 chn RS-232 DTE. Cng COM1 mt trc r le dng

ci t v thm vn rle bng my tnh xch tay, cng RS-232-C th 2, COM2

c lp pha sau r le. Mt cng thng tin RS-485 COM3 cng c lp

sn khi u u ni t pha sau ca r le M.3430; cng COM2 u ni qua

mt Moden, Network (mng) hoc trc tip.(Thng tin chi tit v thng tin vi r le xem ph lc B: Communications cng

nhchng 4; Operation (Computer). C th ghi c d liu n 170 chu k. R

le lu c d liu dng sng vi thi gian n 170 chu k c th lu c d

liu n 4 s kin c la chn bng thi gian duy tr ca b khi ng (post

trigger), khi ti xung, s liu ny c phn tch bng phn mm phn tch biu

dao ng (t chn) M.3801 IPS plot TM

Phn mm thng tin M 3800 IPS COM TM


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Phn xng T-K 44

R le so lch phn trm b qua c hu ht sai s ca CT v tt c cc

CT phi c c tnh v chnh xc ging nhau.

chng sai s do bo ho CT dng in ln mch vng phi c hiu

chnh t ng ( Chnh nh mch hm dng bng hai ln dng nh mc, 4 ln

dng nh mc xem hnh 2-17).

Vi dng rt cao trong my pht ln vn c th xy ra dng khng cn

bng chy trong mch th cp, nhng dng ny phi nh hn nhy cc tiu

ca r le.

Gii hn chnh nh ca bo v dn ra trong bng 2.11

Cc bc chnh nh dn ra trong 2.32

2.3.14. Bo v chng chy cu ch mch VT:

Bo v ny thc hin chng tc ng sai do mt s chc nng ca r le

M3430 khi chy cu ch ca VT gm cho 2 chc nng pht hin li cu ch bn

trong v bn ngoi r le.

Nhng chc nng bo v tc ng nhm khi chy cu ch VT l 40, 21 v

32 c th lp trnh

c khi c hin t

ng mt in p do chy cu ch n s bkho.

Gim st trng thi ca cu ch thc hin t xa hoc ti ch.

2.3.15.

Cc chc nng bn ngoi

R le bo v 3430 c hai chc nng bo v t bn ngoi: thc hin lnh

ct thng qua r le M3430 t nhng tip im bn ngoi: cc tip im khi ng

ct ny c ni ti bt k u vo nh phn no (i2 i6) v sau t nhim v

cho n hot ng theo chc nng ny.

- Gii hn chnh nh dn ra bng 2.16

- Cc bc chnh nh dn ra trang 3.34

- Chc nng ca bo v dn ra dng 2-18

2.3.16.

B ghi dao ng


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Phn xng T-K 45

B ghi dao ng thc hin ghi li cc s liu tng hp ( in p, dng in,

cc u vo/ra trng thi) tt c cc dng sng gim st ( t l ly mu l 16

ln trong 1 chu k). D liu dao ng dng sng c ti xung my tnh c nhn

qua cng thng tin, my tnh chy ch

ng trnh phn mm thng tin M3800 IPSComTM, khi c ti xung d liu dng sng c phn tch kim tra v in ra

nh chng trnh phn mm phn tch d liu dao ng: M3801 IPS plot TM

B ghi c th c khi ng bng tay qua cng thng tin nh phn mm

IPS Com hoc t ng bng lp trnh t cc u vo trng thi (i1-i6) hoc lp

trnh t cc tip im u ra (01-08) khi khng c khi ng b ghi d liu

dng sng, lu cc d liu ny trong b nh m. B nh ca b ghi c chia

thnh tng phn:

- Khi c khi ng ( vi thi gian duy tr ring). B ghi tip tc ghi cc chu

k trong khong thi gian ngi dng xc nh v lu nhng d liu va ghi

c vo trong b nh ca n ti xung nh phn mm IPS Com.

* Ghi ch: Nu c nhiu d liu hoc nhiu tn hiu khi ng ghi xut hin

m ln hn s bn ghi c th lu c ca b ghi trc khi ti xung, th d liu

c nht s mt, cc d liu s khng c lu li khi mt ngun cp.

-B duy tr thi gian khi ng, t 5%-95% c th t c. Sau khi b khing lm vic b ghi s tip tc lu d liu phn lp trnh ca ton b

bn ghi trc khi phn chia cho bn ghi tip theo.

- V d: Nu t l 80% th bn ghi c 20% d liu trc khi khi ng v

80% d liu sau khi khi ng.

* Ch :Hu ht cc trng hp, cc d liu c ghi s xut hin trc khi b

ghi d liu khi ng: nhl ct my ct bo v tc ng.

n: OSCTRIG LED mt trc ca r le ch th b ghi ang lm vic vi d

liu c v ang ti xung.

Ci t b ghi dao ng thc hin theo cc bc trong trang 2-36

3- Vn hnh r le

( Ti mt trc r le)


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Phn xng T-K 48

+ Cc ch th thng bo v gii tr thng bo li:

Bnh thng 24 n thng bo s c (mu ) TARGET LEDS khng sng,

khi xut hin li r le tc ng th n LED ch th tng ng vi cc li va xut

hin s sng ln, v n sng lin tc cho n khi c gii tr, 8 n OUTPUTLEDS phn nh trng thi hin ti ca 8 tip im u ra (0108). n v nh

phm: TARGET RESET s lm sng tt c cc n ch th (kim tra n) v gii

tr s ch th ca cc n TARGET LEDS khi li c loi tr.

Thng tin chi tit v s c ca 32 ln tc ng cui cng c lu li trong

b nh ca r le. phc v cho vic truy cp xem n thng qua mn hnh hin

th LCD t menuVIEW TARGET HISTORY.

- n ri gi phm TARGET RESET s hin th trng thi tc ng hin tica cc chc nng bo v ca r le M3430 trn n ch th thng bo li.

3.1.6 - TIME SYNC LED:n ch th ng b thi gian ( khng dng r le ny)

3.1.7 - DIAGNOSTIC LED:

Dng chun on r le: N sng khi c li trong r le ( n sng nhp

nhy theo m li)

3.1.8 Mn hnh truy cp:

phng nga nhng ngi khng nhim v truy cp vo cc khi chc

nng ca r leM3430. Phn mm c chia theo tmc m truy cp c thit

lp. Khi mun truy cp vo r le phi vo m truy cp sau n ENTER. Mn

hnh truy cp s hin th t mn hnh ngn nh.

C 3 mc m truy cp: Ngun dng c th thay i c

Mc 3: l mc truy cp da vo tt c cc chc nng cu hnh v chnh

nh r le

Mc 2: Truy cp vo r le c, thay i gi tr t , trng thi b

gim st, xem nht k thng bo s c

Mc 1: c gi tr t, trng thi b gim st, xem nht k thngbo s

c.


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Gii thiu R le bo v my pht in chnh DGP

Phn xng sa cha T-K 60

2.3 Mt kch t ( 40 )

Chc nng ny dng pht hin mt kch t cc my in ng

b. N bao gm 2 c tnh ng trn ( mho ) nhn bit hng t h thng

v my pht. Mi c tnh ng trn c thi gian tr, lch (offset), tm

vi ( reach ) c th thay i c. Khi xut hin in p th t nghch v /

hoc VTFF Digital Input DI6 bn ngoi chc nng ny b kho ( xem s

logic hnh 1-4 )

My pht c th xy ra mt kch t do ngn mch hoc h mch cun

dy kch t, trip my ct kch t, hhng h thng t ng iu chnh in

p. Khi my pht mt kch t n c xu hng hot ng nhmt my pht

cm ng : vt tc, cng sut gim v nhn Vars t h thngTng tr m R le nhn bit

hng t h thng v my pht ph

thuc vo c tnh ca my, ti

trc khi mt kch t, kiu ca li

kch thch . Chc nng ng trn

vng 1 ( 40-1 ) c t pht

hin cc li nghim trng vi thi

gian tr ngn. Ngc li vng 2

(40-2 ) c th c t pht hin

tt c cc li kch t vi thi gian tr

di hn (xem hnh 2-7,trang 2-21).

2.4. Chng cng sut ngc (Anti-Motoring).

Khi mt mt phn hay ton b cng sut tuabin, nu cng sut tua

bin nh hn cng sut khng ti ca my pht, cng sut thc s chy t

h thng vo my pht

Cng sut m t ho ca tua bin hi l t 0,5 n 4 % cng sut nh

mc ca t my.

DGP bao gm 2 chc nng 31-1 v 31-2. Tnh ton chnh nh xem

phn 2.3.6 ( sch hng dn s dng R le ca GE ) trang 2-21. S l

gc xem hnh 1-3.


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2.13 Hhng cu ch bin p o lng ( VTFF )

Khi cu ch bin p o lng b chy cc chc nng 40 v 51V c th

tc ng sai ngn nga vic ny khi c li h hng cu ch DGP skho cc chc nng li; tt c cc chc nng bo v khc vn c php

tc ng bnh thng

Nu mt hay nhiu pha b mt in p, in p th t nghch (V2)

tng v/hoc in p th t thun V1 gim. Khi V2 > 15 V hay V1 < 50V

s a ra tn hiu bo tnh trng VTFF.

Tnh ton chnh nh xem phn 2.3.18( sch hng dn s dng R le

ca GE ) trang 2-37S l gc xem hnh 1-7

2.14 V tnh ng in (Accidential Energization)

Nu my pht b ng in khi ang ng yn hoc tc thp n

s hot ng v gia tc nhmt mt cm ng. in p u cc, dng

in ca my trong trng hp s ph thuc vo tr khng my pht,

my bin p v h thng.

Mt tn hiu qu dng (50) c dng pht hin tnh trng v tnh

ng in. Ngoi tn hiu qu dng cn c tn hiu in p th t thun

(V1 < 30V) v u vo s DI1 (gen-off line).

3. Cc tnh nng khc

3.1 Cc u vo :

DGP c 8 u vo dng in v 4 u vo in p, 6 u vo s v 1

u vo tn hiu ng b ho thi gian (Xem s elementary diagram)

3.2 Cc R le u ra :

DGP bao gm 8 R le u ra c th lp trnh v 8 R le c gn

nhim v t trc (predefined).

3.3 T kim tra khi khi ng (Start-up self-test)


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Ch :Sau khi ta n phm [ENT] R le s hi WHICH RLY(R le

no) ? da vo bng sau nhp s ca contact trip u ra

Input # Trip Contact0 94G

1 94G1

2 94G2

3 94G3

4: Reset.

Chc nng ny dng xo thng tin trong b nh ca DGP.

Ch :Khi R le hi RST WHAT(Reset ci g ?) ta nhp s 0

xo fault reportv s 1 xo sequence of events

5. Ngy thng/ Thi gian (DATE/TIME).

Chc nng ny c dng hin th v thay i ngy thng v thi

gian c lu tr trong DGP.

6. Kim tra R le (Relay Test).

Chc nng ny dng test cc chc nng bo v ca h thng DGP.

7. Kim tra MMI (MMI Test).

Chc nng ny dng test mn hnh hin th, bn phm, n LED

trng thi, cc n LED Target, v my in.

8. Fix up settings CRC.

Chc nng ny tnh ton li CRC ca cc settings trong b nh

EEPROM.

9. Nhp Password

C 2 mc Password c nhp t MMI l mc Thay i (Setting)

v mc iu khin (Control).

10. Thay i Password (Change Password).


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Chc nng ny dng thay i Password.

11. digital output test.

Chc nng ny test cc u ra s ca R le. thc hin c chc

nng ny ngi dng phi c Password mc Control.

7.3.10 Phm thng tin (INFORMATION KEY) [INF]

Phm [INF] c dng khai thc thng tin. C 8 loi thng tin

c lit k v nh s t 1 n 8 ngi dng c th truy cp mt cch

trc tip hoc bng cch dng cc phm , cun qua cc loi thng

tin (category). (Xem s cu trc menu Phm [INF] hnh 8-5 trang 8-14).

Tun t phm c dng l [INF] n [ENT], trong n:

n= 1: Thng tin trng thi (status)2: Thng tin li (fault)3: Cc gi tr hin ti (values)4: Cc s kin (events)

5: Mt khu (Password)6: Model (Model)7: Station Id (station id)8: Generator Id (generator id)

1. Request DGP Status (Khai thc thng tin trng thi t DGP).

Chc nng ny dng xem tnh trng hin thi ca DGP. DGP S

hin th cc thng bo tnh trng sau:

Hin th Gii thch

STATUS: OK DGP ang lm vic tt

STATUS: fail DGP C mt li nghim trng

STATUS: warn DGP c mt li khng nguy cp

STATUS: misc DGP ang c mt trng thi hn tp

(miscellaneous)


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Ti liu hc tp R le SR745


D1

D2

D3

D4

D5

D6

D7

D8

D9

D10

D11

D12

u vo l gc 1 (+)

u vo l gc 2 (+)

u vo l gc 3 (+)

u vo l gc 4 (+)

u vo l gc 5 (+)

u vo l gc 6 (+)

u vo l gc 7 (+)

u vo l gc 8 (+)

Truy cp im t (+)

Truy cp im t (-)

Ngun lgc ra (+)

Ngun lgc ra (chung)

H1

H2

H3

H4

H5

H6

H7

H8

H9

H10

H11

H12

Pha A cun 1 CT*

Pha B cun 1 CT*

Pha C cun 1 CT*

Pha A cun 2 CT*

Pha B cun 2 CT*

Pha C cun 2 CT*

Pha A cun 3 CT*

Pha B cun 3 CT*

Pha C cun 3 CT*

Ni t cun 1/2 CT

Ngun iu khin (+)

Ngun iu khin ( - )Trong : (* )Th hin cc tnh ca CT hay VT

Chng II:

vn hnh bng mt trcI . M t bng mt trc ca rle:

Bng mt trc dng giao din ti ch vi R le. N gm c mn

hnh chn khng pht quang, cc n LED ch trng thi, cc phm iu

khin, v cng lp trnh. Mn hnh v cc ch th trng thi cp nht t ng

cc trng thi v cnh bo. Cc phm iu khin c dng chn cc thng

bo thch hp khi thay i im t hay hin th nhng gi tr o c. Cng

lp trnh RS 232 dng ni vi my tnh chy chng trnh SR745 PC.

Mn hnh chn khng pht quang 40 k t, cung cp cc thng bo bng

ting Anh c th nhn thy c trong cc iu kin sng khc nhau. Khi bn

phm v mn hnh khng trng thi ang kch hot, trn mn hnh s hin thln lt ti 30 thng bo mc nh cc thng tin trn h thng m ngi dng

c th la chn. Cc thng bo ny ch xut hin sau thi gian ngh khi ngi

lp trnh dng lp trnh. Khi thng bo mc nh ang hin th, nu ta bm bt

k mt phm no n s a ta ti thng bo trc ca thng bo mc nh

ang hin th.

Ti mt trc ca rle c th nhn c 5 dng hin th thng bo: Gi

tr hin thi, im t, thng bo chun on, chp nhy v tr gip.- Gi tr hin thi l gi tr o bi rle nhdng in, in p, cng sut ...


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Ti liu hc tp R le SR745


- im t c th c lp trnh ngi s dng a vo cc gi tr t .

- Thng bo chun on l cc dng thng bo c ngi lp trnh a

vo hay c mc nh ca nh sn xut, n hin ra trn mn hnh nhm

cho ta bit cc dng hng hc cng nhs tc ng ca rle ...

- Chp nhy l cc thng bo nhp nhy trn mn hnh trong qu trnh ci

t hay c thng bo chun on xut hin (ch th MESSAGE)

- Tr gip (HELP) l cc thng bo tr gip c th hin th cc ch dn khi

ci t bt k tnh hung no.

Tuy nhin khng k bt c ai nu c nh hiu bit v rle SR745

m bit c ton b cc tnh nng ca rle th s rt tt, y khuyn

co rng nu mt ai cha hiu thun thc cc tnh nng ca rle th khng

nn thm nhp vo rle vi bt k hnh thc no.M t mt trc ca Rle nhhnh v sau: (hnh 1-3)

Hnh 1-3: M t mt trc rle

Mn hnh 40 k tCc nt iu khin ti chv cc n tr n thi

Cng giao din RS 232

Cc phmgim st vci t gitr bo v


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VN HNH R LE SR 750A Phn chung : I M t :

II Cc tnh nng ca relay :III u dy in hnh :

B Vn hnh bng mt trc :I M t :II Cc n ch th trng thi :III Cc phm mt trc r le :

C Cch truy cp khi vn hnh:

I Cch xem cc thng bo :II xem cc gi tr hin thi :III Cc gi tr hin thi : (ACTUAL)


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(c s thay i bo v, gim st dng v phi hp cc vng bo v).- ng v ct my ct.

8.

c tnh khc

- B ghi d liu(8 knh).

- B ghi s kin (128 s kin)- Bt dng sng (16 mu / chu k).- ng h thi gian thc .- ng b ho thi gian thc IRIG-B .

9. Giao din ngi s dng:- Mn hnh hunh quang chn khng 40 k t .- B ch th LED trn tm mt .

- Xo cc thng ip ngn ng ting Anh .- Nhy ng cnh tr gip thng ip .- Cu trc thng ip trc gic .- Bn phm s y .- Phm iu khin my ct .- Bo mt truy cp (phm v mt m).- M phng trc s c , S c v sau s c .- Chng trnh c s trong b nh cc nhanh

(Nng cp qua cng RS232).III . u dy in hnh:

1.S u dy in hnh: Do c nhiu tnh nng c ch to sn trong r le SR-750, ngi s dngc th dng cho cc ng dng c di thay i rng. V vy, n khng c kiu

u ni in hnh cho tt c cc s c th.trong phn ny ti a ra s bao gm cc im quan trng ca kt ni cho phn chung ca cc u voBin dng in, bin p o lng, cc u vo khc, cc u ra, cc u giao

tip v ni t .Ch : C th c nguy him nu khng s dng s u dy ng

mc ch thit k ca rle.

S u dy in hnh cho rle SR 750 c v trn hnh 1-2


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Ngun c th tABC hay BCA

Ti

Hnh 1-2 S u dy in hnh chorle SR 750

SR - 750

V tr cc tipim ch ra khi

khng c nguninkhin


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ca my ct, hoc tt ngay sau khi tip im ph ca my ct bo v trmy ct m.

CLOSE : n ny bt sng ngn trong khi r le 2 CLOSE vn hnh(lnh ng t nt ng mt trc rle i tc ng ng my ct). N

ch sng khng qu 200ms nu khng dng tip im ph my ct,hoc tt ngay sau khi tip im ph ca my ct bo v tr my ct ng.

3-7 AUXILIARY : l cc n bo khi c yu cu dng ring ca ccchc nng bo v . N sng khi mt chc nng ring ca bo v lmvic .

SELF-TEST WARNING : n ny sng bo r le hhng, trong qutrnh vn hnh bnh thng n ny tt. Nu mt ngun r- le 8 SELF-TEST WARNING s bo hiu mt bo v bi khng vn hnh nhngn LED in t khng sng.

2)Cng giao tip RS 232 v cc phm:

1.

Cng giao tip RS 232:

Chng trnh PC SR 750/760 dng truy cp vo cc im t ca

rle v cc gi tr hin thi thng qua my tnh c nhn chy trn

Windows95, WindowsNT v 1 cng RS 232 ca my tnh - COM1

hoc COM2 c a vo cng RS 232 ca rle cho php ta c th thchin cc vic sau:

- Lp trnh/hiu chnh cc im t.

- Np vo/ lu tr cc tp tin t my tnh vi rle.

- c cc gi tr hin thi.

- Gim st trng thi.

- V hnh, in, xem th tia ca cc gi tr hin thi m ta la chn.

- Sao chp hnh nh dng sng (khi dao ng).- Ti xung v chy li cc dng sng ( ch m phng).

- Xem cc bn ghi s kin.

- C cc tr gip vi bt k ch no.

2. Cc phm:

1. Phm SETPOIN : Dng lt t u n cui tiu cc trang cathng s lp trnh (cc im t) .


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Hng dn vn hnh r le SR-750


- T ng phc hi sau khi ct thp p.- T ng phc hi sau khi ct tn s thp.- Chuyn (c s thay i bo v, gim st dng v phi hp cc vng bo v).

- ng v ct my ct.8.

c tnh khc

- B ghi d liu(8 knh).- B ghi s kin (128 s kin)- Bt dng sng (16 mu / chu k).- ng h thi gian thc .- ng b ho thi gian thc IRIG-B .

9.

Giao din ng

i s dng:- Mn hnh hunh quang chn khng 40 k t .- B ch th LED trn tm mt .- Xo cc thng ip ngn ng ting Anh .- Nhy ng cnh tr gip thng ip .- Cu trc thng ip trc gic .- Bn phm s y .- Phm iu khin my ct .

- Bo mt truy cp (phm v mt m).- M phng trc s c , S c v sau s c .- Chng trnh c s trong b nh cc nhanh (Nng cp qua cng RS232).

III . u dy in hnh:1.S u dy in hnh:

Do c nhiu tnh nng c ch to sn trong r le SR-750, ngi s dngc th dng cho cc ng dng c di thay i rng. V vy, n khng c kiu

u ni in hnh cho tt c cc s c th.trong phn ny c a ra s bao gm cc im quan trng ca kt ni cho phn chung ca cc u vobin dng in, bin p o lng, cc u vo khc, cc u ra, cc u giaotip v ni t .

Ch : C th c nguy him nu khng s dng s u dy ng

mc ch thit k ca rle.

S u dy in hnh cho rle SR 750 c v trn hnh 1-2


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CLOSE : n ny bt sng ngn trong khi r le 2 CLOSE vn hnh(lnh ng t xa hay t nt ng CLOSEmt trc rle i tc ng ngmy ct). N ch sng khng qu 200ms nu khng dng tip im phmy ct, hoc tt ngay sau khi tip im ph ca my ct bo v tr my

ct ng. 3-7 AUXILIARY : l cc n bo khi c yu cu dng ring ca cc

chc nng bo v . N sng khi mt chc nng ring ca bo v lmvic .

SELF-TEST WARNING : n ny sng bo r le hhng, trong qutrnh vn hnh bnh thng n ny tt. Nu mt ngun r- le 8 SELF-TEST WARNING s bo hiu mt bo v bi khng vn hnh nhngn LED in t khng sng.

III. Cng giao tip RS 232 v cc phm:

a.

Cng giao tip RS 232:

Chng trnh PC SR750/760 dng truy cp vo cc im t ca rle

v cc gi tr hin thi thng qua my tnh c nhn chy trn

Windows95, WindowsNT v 1 cng RS 232 ca my tnh - COM1hoc COM2 c a vo cng RS 232 ca rle cho php ta c th thc

hin cc vic sau:

- Lp trnh / hiu chnh cc im t.

- Np vo / lu tr cc tp tin t my tnh vi rle.

- c cc gi tr hin thi.

- Gim st trng thi.

- V hnh, in, xem th tia ca cc gi tr hin thi m ta la chn.

- Sao chp hnh nh dng sng (khi dao ng).

- Ti xung v chy li cc dng sng ( ch m phng).

- Xem cc bn ghi s kin.- C cc tr gip vi bt k ch no.

b. Cc phm:

1. Phm SETPOIN : Dng lt t u n cui tiu cc trang cathng s lp trnh (cc im t) .

2. Phm VALUE UP v VALUE DOWN : Dng thay i t u n cui cc la chn c th ca lit k cc im t.

N cng c th tng v gim s ca cc im t.


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c.Internal Temp Bo xc nh c nhit qu thp (di -

40C) hoc qu cao (trn +85C) bn trong rle.IRIG-B Failure Bo s ng b ho thi gian IRIG-B ang s

dng nhng tn hiu khng c gii m.Low Battery Bo pin d phng cho ng h ht. Kh nng ca

rle duy tr thi gian ngy thng hin ti khngc in p ngun iu khin, c th b mt.

Not Calibrated Bo r le khng c nh sn xut t nghim.Pickup Test Bo rng im t PICKUOP TEST FUNCTION

c t l s dng(Enable).Prototype Software Bo hiu phn mm ngun mu c ti vo

trong rle.Relay Not Ready Bo hiu khi im t SR 750 OPERATION

khng c sn sng.RTC Crystal Bo s c ng h thi gian thc (Real Time

Clock). Kh nng ca rle duy tr thi gian ngythng hin ti b mt.

Simulation Mode Bo l tnh nng m phng ca rle ang c

kch hot

II. Xem cc gi tr hin thi :

A.Thao tc xem cc gi tr hin thi:

Cc gi tr o lng, bo dng, v thng tin phn tch s c... c truycp trong phng thc hin thi. Cch thao tc truy cp vo cc gi tr hinthi nhsau :

n ACTUAL n An m cn xem C 5 trang ph l: A1, A2, A3, A4,

A5 .

n MESSAGE UP v MESSAGE DOWN xem nidung tng trang ph cp 1.

n ENTER xem trang ph cp 2 .

n MESSAGE UP v MESSAGE DOWN xem ni

dung tng trang ph cp 2 .

n ESCAPE thot khi cc trang ph n tip ESCAPEs thot v

trang u.


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Bin v vc t in p dy v in p pha cho cc u vo VT thanh cic hin th cng vi cc thnh phn th t. Tt c cc thng bo c linquan n in p pha ch hin th nu im tVT CONNECTIONTYPEc lp trnh sao (wye).

VOLTAGE [ENTER] for more

ng dn vo gi tr hin thi in pnhsau: \ ACTUAL VALUES\A2STATUS\VOLTAGE.

AB: 0.00 BC: 0.00CA: 0.00 kVolts

Hin th cc bin in p dy trncng mt thng bo

AN: 0.00 BN: 0.00CN: 0.00 kVolts

Hin th cc bin in p pha trncng mt thng bo

AVERAGE LINE

VOLTAGE 0.00kV

Hin th cc bin in p dy trung

bnhVavg=(Vab+Vbc+Vca)/3.

AVERAGE PHASEVOLTAGE 0.00kV

Hin th cc bin in p pha trungbnh

Vavg=(Van+Vbn+Vcn)/3LINE A-B VOLTAGE: 0.00 kV 00Lag

Hin th cc bin in p dy A-B

LINE B-C VOLTAGE: 0.00 kV 00Lag Hin th cc bin in p dy B-C

LINE C-A VOLTAGE: 0.00 kV 00Lag

Hin th cc bin in p dy C-A

LINE A-N VOLTAGE: 0.00 kV 00Lag

Hin th cc bin in p pha A-N

LINE B-N VOLTAGE: 0.00 kV 00Lag

Hin th cc bin in p pha B-N

LINE C-N VOLTAGE: 0.00 kV 00Lag Hin th cc bin in p pha C-N

NEUTRAL VOLTAGE: 0.00 kV 00Lag

Hin th cc bin in p trung tnh3VO= Va+VB+VC.

POS SEQ VOLTAGE: 0.00 kV 00Lag

Hin th cc bin in p th t thunVa= (Va+aVb+a

2VC)/3 cho th t phaABC.Va= (Va+aVc+a

2Vb)/3 cho th t pha

ACB.


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NEG SEQ VOLTAGE: 0.00 kV 00Lag

Hin th cc bin in p th tnghchVa2= (Va+aVc+a

2Vb)/3 cho th t phaABC.

Va2= (Va+aVb+a2Vc)/3 cho th t phaACB.

ZERO SEQ VOLTAGE: 0.00 kV 00Lag

Hin th cc bin in p th t khngVao= (Va+Vb+Vc)/3.

Tn s (FREQUENCY)

Tn s c o lng nh b kim tra v 0 theo in p pha A. Tn s

v suy gim tn s s c c l khng nu in p i qua chn niu vo Va nh hn 10 Vn.

FREQUENCY [ENTER] for more

ng dn vo gi tr hin thi Tn Snhsau: \ ACTUAL VALUES\A2STATUS\FREQUENCY

SYSTEM FREQUENCY: 0.00Hz

Hin th tn s ca h thng in

FREQUENCY DECAY:RATE 0.00 Hz/s

Hin th tc st tn s.( Khi gi tr l(+)th tn s gim, khi gi tr l (-) th tns tng).

Cng sut (POWER)

R le tnh ton v hin th cng sut tc dng, phn khng v biu kin cah thng.

POWER

[ENTER] for more

ng dn vo gi tr hin thi Cngsut nhsau: \ ACTUAL VALUES\A2STATUS\POWER.

3 READ POWER: 0.0 MW

Thng bo ny hin th cng sut tcdng ba pha.

3 REACTIVE POWER: 0.0 Mvar

Thng bo ny hin th cng sut phnkhng ba pha.

3 APPARENT POWER : 0.0 MVA

Thng bo ny hin th cng sut biukin ba pha.

3 POWER FACTOR: Thng bo ny hin th h s cng sut


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0.00 ba pha nhnhn v pht.

A READ POWER: 0.0 MW

Thng bo ny hin th cng sut tcdng pha A. Thng bo cng sut tngt cho pha B v C.

A REACTIVE POWER: 0.0 MVar

Thng bo ny hin th cng sut phnkhng pha A. Thng bo cng sut tngt cho pha B v C.

A APPARENT POWER:

0.0 MVA

Thng bo ny hin th cng sut biukin pha A. Thng bo cng sut tngt cho pha B v C.

A POWER FACTOR 0.00

Thng bo ny hin th h s cng sutpha A nhnhn v pht. Thng bo h scng sut tng t cho pha B v C

Nng lng (ENERGY)

Rle s dng cc s liu cng sut 3 pha xc nh tng nng lngtiu th.Ch : Rle SR750 khng dng l ng h o mc thu nhp v c thkhng s dng cho mc ch c sn. ENERGY

[ENTER] for moreng dn vo gi tr hin thi Nnglng nhsau: \ ACTUAL VALUES\A2STATUS\ ENERGY.

POSITIVE WATTHOURS: 0.0 MWh

Hin th nng lng tc dng dng.Cng sut tc dng dng s thm vogi tr tch lu.

NEGATIVE WATTHOURS: 0.0 MWh

Hin th nng lng tc dng m. Cngsut tc dng m s thm vo gi tr tchlu.

POSITIVE VARHOURS: 0.0 MVarh

Hin th nng lng phn khng dng.Cng sut phn khng dng s thmvo gi tr tch lu.

NEGATIVE VARHOURS: 0.0 MVarh

Hin th nng lng phn khng m.Cng sut phn khng m s thm vogi tr tch lu.

POSITIVE WATTHOURS: COST: $ 0

Hin th chi ph xp x ca nng lngtc dng dng.

NEGATIVE WATTHOURS: Hin th chi ph xp x ca nng l

ng


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COST: $ 0 tc dng m.ENERGY USE DATA LASTRESET: Mar 16 1997

Hin th ngy cui cng d liu nnglng s dng b xo

Ch : Cch truy cp vo rle SR750 khi dng my tnh tng t nhca rle SR 745.


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R le bo v ng c SR469

Phn xng sa cha T-K. 168

Rle bo v ng c SR 469 l loi rle c b vi x l c thit k c bn

iu khin, bo v cc ng c c cng sut va, ln v thit b n ng. R leSR- 469 c trang b 6 r le u ra tc ng ct, bo tn hiu v khng ch khi

ng. Cc chc nng bo v, phn on s c, o m in nng v RTU ca ng

c c tch hp vo mt hp chung c th ko ra ngoi c.

Hnh 3. S tng th R le SR469


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Mi rle u c trang b cc chc nng bo v , iu khin v gim st c

c 2 giao din vi ngi l ti ch v t xa .Chng hin th trng thi tc ng / bo

ng hin hnh, o m c khong hn 35 thng s. Thc hin ghi li tc ng

tr

c, bo ng hoc cc s kin iu khin, cc mc yu cu cc i v cng suttiu th.II.Tm tt cc tnh nng ca r le SR469.

1. Chc nng bo v v gim st:

) R le SR469 kt hp vi my ct LF2.

Bo v thp p.

Bo v qu ti.

Bo v qu dng ct nhanh. Bo v qu dng khng cn bng.

Bo v chm t.

Bo v so lch ct nhanh.

Bo v chng phng h quang khu vc thanh ci v t VT.

b) R le SR469 kt hp vi my ct LD.

Bo v thp p.

Bo v qu ti.

Bo v qu dng khng cn bng.

Bo v chng phng h quang khu vc thanh ci v t VT.

Bo v chm t.

*Ch :

Hai chc nng qu dng ct nhanh v so lch khng c s dng trong

r le l do ton b ng cp cp cho ng c c bo v chng ngn

mch vi dng ngn mch ln bng cu ch cao p.

Ngoi cc chc nng bo v chnh trn r le SR469 cn c thm mt s

chc nng sau: Bo v nhit , khng ch khi ng, bo v tn s, h s


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cng sut..... trong c mt s chc nng khng c s dng cho cc

ng c DC2

2. Chc nng o m:

o in p.

o dng in.

o cng sut v in nng.

o m men.

o tn s.

o h s cng sut.

o nhit .

o tc .III . u dy in hnh:

1.S u dy in hnh: Do c nhiu tnh nng c ch to sn trong r le SR-750, ngi s dng c

th dng cho cc ng dng c di thay i rng. V vy, n khng c kiu u ni

in hnh cho tt c cc s c th.trong phn ny ti a ra s bao gmcc im quan trng ca kt ni cho phn chung ca cc u vo Bin dng in,

bin p o lng, cc u vo khc, cc u ra, cc u giao tip v ni t .

Ch : C th c nguy him nu khng s dng s u dy ng mcch thit k ca rle.


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Hnh 4. S u dy in hnh cho r leSR469


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Chng II

vn hnh r le SR469I . M t bng mt trc ca rle v cc ng dng ca n:

Bng mt trc dng giao din ti ch vi R le. N gm c mn hnh

chn khng pht quan, cc n LED ch trng thi, cc phm iu khin, v cng

lp trnh. Mn hnh v cc ch th trng thi cp nht t ng cc trng thi v cnh

bo. Cc phm iu khin c dng chn cc thng bo thch hp khi thay i

im t hay hin th nhng gi tr o c. Cng lp trnh RS 232 dng ni vi

my tnh chy chng trnh PC SR- 469.

1.Mn hnh chn khng pht quang 40 k t: Cung cp cc thng bo

bng ting Anh c th nhn thy c trong cc iu kin sng khc nhau. Khi bn

phm v mn hnh khng trng thi ang kch hot, trn mn hnh s hin th lnlt cc thng bo mc nh. Bt c tc ng, bo ng hoc kho khi ng no

cng s t ng ghi ln cc thng bo ngm nh v hin th ln mn hnh.

2. Cc ch th n LED:

C 3 nhm ch th bng n LED:

Ch th trng thi ca R le SR- 469.

Ch th trng thi ca ng c.

Ch th trng thi ca cc r le u ra.

2.1 Cc ch th n LED trng thi R le SR- 469:

SR469 INSERVICE: Ngun iu khin c cp, tt c cc h thng

bn trong v I/O c gim st tt, r le SR469 c lp trnh, chng

hnh 5. Mn hunh quang ca r le


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ang ch bo v ch khng phi ch m phng. Khi ch

th nghim hoc ch m phng th n LED ny s sng.

SETPOINT ACCESS: ...........................

COMPUTER RS485: S sng khi c bt c kch hot no cngchung. Duy tr sng khi d liu vo c hiu lc v c dng cho a

ch ph thuc c lp trnh trong r le.

AUXILARY RS485: S sng khi c bt c kch hot no cng

chung. Duy tr sng khi d liu vo c hiu lc v c dng cho a

ch ph thuc c lp trnh trong r le.

Thng bo thit b khi ng s b kho khng nhng bi thi gian

kho c lp trnh m c iu kin vn hnh hin ti.

RESET POSSIBLE: Cho bi

hệ thống relay bảo vệ - nhà máy nhiệt điện phả lại.pdf

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