january 2020 - southern regional power committee - govt of ... · 55 132 421046 pochampad 421075...

Anusha

Text Box

Annexure-I

Annexure-II

(df/dt) Stage-I (df/dt) Stage-II Comments if any

Load in MW

SL.NO Name of SS Voltage Level Name of Utility

Bus Number as

per PSSE (if

applicable)

Annexure-II

AUFR Stage-I AUFR Stage-II AUFR Stage-III AUFR Stage-IVSL.NO Comments if any

Load in MW

Name of UtilityVoltage Level Name of SS

Bus Number as

per PSSE (if

applicable)

Annexure-II

SL.NO Name of SS

Bus Number as

per PSSE (if

applicable) Voltage Level Pumped Storage load in MW Comments if any

Annexure-II

Bus Number as

per PSSE (if

applicable)

Installed capacity Actual Generation Comments if any

RE Generation in MW

SL.NO Name of SS Voltage Level RE Type

Annexure-II

Sl.No

Name of Transmission

line at 220kV and Below Voltage level From Station To Station

From Bus number in psse

(if applicable)

To Bus number in psse (if

applicable) Comments if any

Southern Region Islanding Scheme

January 2020

Annexure-III

Page 1 of 34

Introduction

• The islanding scheme envisages that if fall of frequency is upto 47.9 Hz, then it will be taken as indication that grid disturbance is imminent and islanding will be initiated to protect major load centres/ generating complex to save them to black-out and facilitate early restoration.

• The following 4 Islanding schemes are existing and have been reviewed at present

• Ramagundam• Kudankulam• Neyvelli• Chennai

• The newly proposed Simhadri Islanding scheme is also discussed

• The Islands LGBR is checked from SRLDC RTSD PSS/E cases, which are generated daily ( Every 3 hours )

• The case have been taken for July to December 2019.• The Case is prepared by taking the Generators Despatch from SCADA.• The Load is scaled on pro-rata to state Demand .

Annexure-III

Page 2 of 34

Thought Forward

• In most of the existing island’s in SR, consist of either high Lift Irrigation scheme or high renewable generation penetration. Thus the Ideal behaviour of them during island operation is important for a successful island formation

• The Treatment of LIS/Pumped Generators(Srisailam , Kadampari , Nagarjunsagar PH-Pump Mode)

• As the Island is being formed after all the UFR stage’s and at low frequency, the islanded operation with Lift Irrigation pump sets is not desirable

• Hence the Lift Irrigation Pump sets to be tripped after Stage IV of UFR at 48.5 Hz.• The Treatment of RE

• During High frequency operation after the successful Island formation• The conventional generators would trip at 51.5 Hz. • To avoid the tripping of synchronous machines , to avoid this the RE to tripped to tripped/reduced

at 50.85 Hz ??• As per CEA connectivity technical standards, the generating unit shall be capable of operating

in the frequency range 47.5 to 52 Hz and be able to deliver rated output in the frequency range of 49.5 Hz to 50.5 Hz.

• Generators to be equipped with the facility for controlling the rate of change of power output at a rate not more than ± 10% per minute

Annexure-III

Page 3 of 34

Ramagundam Island

• Ramagundam Island Size 4700 MW

• Major Generators• Ramagundam TPS• Singareni TPS• Kakatiya TPS

• Major Load Centres• Hyderabad• Warangal

• Upcoming Generating units have not been considered

• Telangana STPP• Bhadradri TPS• Damarcherla TPS

• More Lift Irrigation projects to get commissioned in Telangana

Annexure-III

Page 4 of 34

Load Generation Balance Details

S.No AreaGeneration

(MW)Load (MW)

Losses (MW)

1 TS SPDCL 0 3496 124

2 RGM TPS 2446 0 30

3 TS NPDCL 2250 357 35

4 TS WW 0 50 05 TOTALS 4696 4505 192

S.No AreaGeneration

(MW)Load (MW)

Losses

1 TS STU 0 4504 1542 TS HYDRO 36 03 TS THERMAL 1070 04 TS STPP 1136 05 NTPC SR 2454 0 386 Totals 4696 4504 192

S.NoBus

NumberGenerator Name Generation (MW)

Installed Capacity (MW)

1 424002 Ramagundam TPS 2446 26002 424015 Singareni 1136 12003 424009 Kakatiya 1025 1100

4 421055 Ramagundam B 45 635 421047 Pochampad 36 36

6 42135 Orient Cements 8 8

Annexure-III

Page 5 of 34

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7/1/2019 7/16/2019 7/31/2019 8/15/2019 8/30/2019 9/14/2019 9/29/2019 10/14/2019 10/29/2019 11/13/2019 11/28/2019 12/13/2019 12/28/2019 1/12/2020

% M

ism

atch

Gen

erat

ion

/Lo

ad (M

W)

Ramagundam Island Load Generation Balance

Island Generation Island Load Margin Available w.r.t Generation (%)

Average Generation

Average Load

Average Mismatch

3553

5019

45 %

Annexure-III

Page 6 of 34

Transmission Lines Tripped

S.NoVoltage Level

(KV)From Bus No From Bus Name

To Bus Number

To bus Name Circuit ID

1 400 424021 MHSWRM-PG 414010 KURNOOL T1

2 400 424002 RSTPS NTPC 424007 DICHIPALLI T1

3 400 424006 MAMIDIPALLI 424019 DINDI T1

4 400 424006 MAMIDIPALLI 424019 DINDI T2

5 400 424011 MALKARAM 424016 SURYAPET T1

6 400 424011 MALKARAM 424016 SURYAPET T2

7 400 424021 MHSWRM-PG 424001 VELTOOR T1

8 400 424021 MHSWRM-PG 424001 VELTOOR T2

9 400 424026 SUNDILLA 424027 NIRMAL Q1

10 400 424026 SUNDILLA 424027 NIRMAL Q2

11 400 424029 KETIREDDYPAL 424016 SURYAPET Q1

12 400 424029 KETIREDDYPAL 424016 SURYAPET Q2

13 400 424002 RSTPS NTPC 414007 TALLAPALLI T1

14 400 424002 RSTPS NTPC 414007 TALLAPALLI T2

15 400 424003 GHANAPUR 414007 TALLAPALLI T1

16 400 424002 RSTPS NTPC 424014 BHADRAWATHI T1

17 400 424002 RSTPS NTPC 424014 BHADRAWATHI T2

18 400 424006 MAMIDIPALLI 424004 KHAMMAM T1

19 400 424006 MAMIDIPALLI 424004 KHAMMAM T2

20 400 424010 WARANGAL 424004 KHAMMAM T1

21 400 424013 SHANKARPALLI 424018 NIZAMABAD T1

22 400 424013 SHANKARPALLI 424018 NIZAMABAD T2

23 400 424021 MHSWRM-PG 427002 MAHESWARAM 2

24 400 424021 MHSWRM-PG 427002 MAHESWARAM 1

25 220 422013 WARANGAL 422106 MAHABUBAD M1

26 220 422013 WARANGAL 422106 MAHABUBAD M2

27 220 422024 MALKARAM 422026 NKP 220KVSS M1

28 220 422024 MALKARAM 422026 NKP 220KVSS M2

29 220 422027 BHONGIR 422028 WKP 220KV SS Z1

30 220 422027 BHONGIR 422028 WKP 220KV SS Z2

S.No Voltage Level (KV) From Bus No From Bus Name To Bus Number To bus Name Circuit ID

31 220 422031 MMP 220 BUS 422048 SHADNAGAR Z1

32 220 422032 BHEEMGAL 422015 DICHPALLY220 1

33 220 422036 JAGTYALA 422025 NIRMAL M2

34 220 422036 JAGTYALA 422025 NIRMAL Y1

35 220 422041 GJWL 220 BUS 422030 MINPUR Z1

36 220 422041 GJWL 220 BUS 422030 MINPUR Z2

37 220 422054 SHANKARPALLY 422014 YEDUMRAM M2

38 220 422054 SHANKARPALLY 422014 YEDUMRAM Z1

39 220 422054 SHANKARPALLY 422063 SADASIVPET M1

40 220 422054 SHANKARPALLY 422063 SADASIVPET M2

41 220 422054 SHANKARPALLY 422083 PARIGI 220KV M1

42 220 422054 SHANKARPALLY 422083 PARIGI 220KV M2

43 220 422056 MEDARAM 422015 DICHPALLY220 1

44 220 422098 MAHES_220 422110 MADGULA 1

45 220 422098 MAHES_220 422110 MADGULA 2

46 220 422116 KETHIREDDYPA 422014 YEDUMRAM 1

47 220 422116 KETHIREDDYPA 422048 SHADNAGAR 1

48 220 422123 JANGOAN 422028 WKP 220KV SS 1

49 220 422123 JANGOAN 422028 WKP 220KV SS 2

50 220 422123 JANGOAN 422028 WKP 220KV SS 3

51 220 422001 TANDUR 432002 SEDAM Z1

52 132 421011 CHGUTTA 132 421160 TURKAYAMJAL 1

53 132 421026 KAMLAPUR 421037 MANUGURU 1

54 132 421026 KAMLAPUR 421037 MANUGURU 2

55 132 421046 POCHAMPAD 421075 NIRMAL 1

56 132 421046 POCHAMPAD 421121 ARM00R 1

57 132 421052 RGPALLY_WGL 421067 WADEKLLY 1

58 132 421052 RGPALLY_WGL 421067 WADEKLLY 2

59 132 421070 WARANGAL 421253 GEESUKONDA 1

60 132 421148 SHAMSHABAD 421029 KOTHUR 1

Annexure-III

Page 7 of 34

Transmission Constraints

S.NoFrom Bus Number

From Bus NameTo Bus

NumberTo Bus Name Circuit ID

Loading (MW)

SIL Rating(MW)

% Loading (%)

1 422017 GACIBWLI 422054 SHANKARPALLY220.00 R2 252.5 200 126.3

2 422017 GACIBWLI 422054 SHANKARPALLY220.00 R1 203.3 200 101.7

3 422027 BHONGIR 422123 JANGOAN 1 150.5 131 114.9

4 422027 BHONGIR 422123 JANGOAN 2 150.5 131 114.9

5 422011 SHAPURNGR 422123 JANGOAN 1 147.6 131 112.7

6 422047 SHAMSHABAD 422116 KETHIREDDYPA220.00 1 141.7 131 108.2

7 422024 MALKARAM 422058 GUNROCK C1 140.1 131 107

8 422024 MALKARAM 422058 GUNROCK C2 140.1 131 107

9 422029 MEDCHAL 422041 GJWL Z1 133.1 131 101.6

10 422029 MEDCHAL 422041 GJWL Z2 133.1 131 101.6

11 422003 GHANAPUR 422020 MOULALI Y1 132.4 131 101

12 422024 MALKARAM 422027 BHONGIR Z1 131.1 131 100.1

13 422024 MALKARAM 422027 BHONGIR Z2 131.1 131 100.1

S.NoBus

NumberStation Name

Bus Voltage (kV)

Voltage (pu)Voltage

(kV)

1 421019 JUBILEE 132 0.8655 114.24

2 421050 R.CPURAM 132 0.8702 114.86

3 421133 MADAPUR 132 0.8702 114.87

4 421280 ERGD 132 0.8788 116.01

5 421288 ISB_GCBL 132 0.879 116.03

6 421088 GACIBWLI 132 0.8791 116.04

7 421175 ASIFNAGAR 132 0.8838 116.67

8 421339 MDPALLY 132 0.8877 117.18

9 421065 SIVARAMPALLY132.00 132 0.8879 117.21

10 421348 SVP_B 132 0.8903 117.51

Line Loading Above SIL

Bus Voltage below 0.9 PU

• In this Island the transmission lines are not loaded up to the thermal/emergency limits

Annexure-III

Page 8 of 34

Conclusion

• In the Ramagundam Island , as seen from the data it is most of the time a deficit island with a average mismatch of almost around 45%, however the UFR and df/dt loads are yet to be mapped.

• In Telangana there is huge Solar Generation and Large amount of Lift irrigation pump sets. Thus creating further uncertainty in the Island success

• With the commissioning of the upcoming generators Telangana STPP, Damarcherla the Islanding scheme needs to be further reviewed.

• In case of successful Island formation the transmission lines are in the normal limits.

Annexure-III

Page 9 of 34

Chennai Island

• Chennai Island Size 4200 MW

• Major Generators• NTECL Vallur

• North Chennai TPS

• MAPS

• Major Load• Chennai City

• Upcoming Generators not considered

• North Chennai TPS Extension

• Ennore TPS Extension

Annexure-III

Page 10 of 34


S.No AreaGeneration

(MW)Load (MW)

1 TN_STU 0 4045

2 TN_THERMAL 1736 03 TN_NCE 614 0

4 NTPC_SR 1354 0

5 NPC_SR 405 0

Totals 4109 4045

S.NoBus

NumberGenerator Name

Generation (MW) (MW)

Installed Capacity

(MW)

1 444019 NTECL-VALLUR400.00 1354 1500

2 444022 NCTPS-II 400.00 1153 1200

3 442054 NCTPS-I 230.00 583 630

4 442044 MAPS2 230.00 405 4405 442110 OPG_ALM 230.00 110 160

6 442109 SDEV 230.00 77 1207 441097 OPGGPD1 110.00 71 80

8 441110 SVSUGARS 110.00 51 759 442120 KAMACHI 230.00 48 73

10 441156 TULYSAN1 110.00 51 7011 441061 TCPL1 110.00 59 6312 442121 KAVERI 230.00 48 63

13 442122 ARS 230.00 48 6014 441062 HITECH1 110.00 26 34

15 441981 DHARANI1 110.00 20 2516 441151 MBDL 110.00 6 10

S.No AreaGeneratio

n (MW)Load (MW)

Losses (MW)

1 MADRAS-APS 405 0 1.8

2 NTECL-VALLUR 1354 0 5

3 TN-CHENNAI 2330 3541.1 52.14 TN-VELLORE 0 372.5 4.25 TN-VILLUPURM 20.4 130.9 1.8

TOTALS 4109.5 4044.5 64.9

Annexure-III

Page 11 of 34

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ch (

%)

Load

/gen

erat

ion

(M

W)

Chennai Island Load Generation Balance


Average Generation

Average Load

Average Mismatch

1765

3353

-101 %

Annexure-III

Page 12 of 34

Transmission Lines TrippedS.No Voltage Level (kV)

From Bus Number

From Bus Name To Bus Number To Bus Name Circuit ID

1 765 447002 TIRUVALAM 417005 CUDDAPAH-PG H1

2 765 447002 TIRUVALAM 417005 CUDDAPAH-PG H2

3 400 444001 SRIPERUMBDUR 414002 CHITTOOR T1

4 400 444024 TIRUVALAM-PG 414002 CHITTOOR Q1

5 400 444024 TIRUVALAM-PG 414002 CHITTOOR Q2

6 400 444031 TIRUVALAM-TN 444039 PALAVADI Q1

7 400 444031 TIRUVALAM-TN 444039 PALAVADI Q2

8 400 444001 SRIPERUMBDUR 414003 NELLORE-PG T1

9 400 444001 SRIPERUMBDUR 414003 NELLORE-PG T2

10 400 444024 TIRUVALAM-PG 414003 NELLORE-PG Q1

11 400 444024 TIRUVALAM-PG 414003 NELLORE-PG Q2

12 400 444024 TIRUVALAM-PG 434010 KOLAR T1

13 400 444007 KALIVNDPATTU 444015 PUGALUR T1


15 400 444018 S V CHATHRAM 464001 PONDY T1


17 400 444018 S V CHATHRAM 464001 PONDY T1

18 230 442001 TVALAM2 412009 CHITTOOR 1

19 230 442002 GUMDIP2 412003 SULURPET 1

20 230 442007 ACHARAP2 442096 VILUPRM2 1

21 230 442014 ARNI2 442077 SPET 1

22 230 442123 TRVLM-N 442077 SPET 1

23 110 441866 VADUGUTNGL 441859 GUDIYATM 1

24 110 441896 CHETPET1 441897 THAYANUR 1

25 110 441905 VELLORE 441908 ANAICUT 1

26 110 441945 POLUR 441871 SPET1 1

27 110 441945 POLUR 441944 ADAMANGL 1

Annexure-III

Page 13 of 34


S.NoFrom Bus Number

From Bus NameTo Bus


Loading (MW)

SIL Rating(MW)

% Loading (%)

1 442007 ACHARAP2 442044 MAPS2 1 141.9 131 108.3

2 442009 ALAMAT42 442038 KOYMBDU2 1 145.7 131 111.2

3 442009 ALAMAT42 442132 TIRUVERKADU 1 155.8 131 118.9

4 442015 BASINBR2 442083 TONPET2 1 162.4 131 123.9

5 442020 MYLAPORGIS 442043 MANALI2 1 146.9 131 112.1

6 442037 KORATUR2 442043 MANALI2 1 135.5 131 103.4

7 442054 NCTPS-I 442083 TONPET2 1 147.2 131 112.4

8 441013 TONPET1 441054 SEMBIUM1 2 79.2 48 165

9 441047 GPOOND21 441094 DURAINALLUR 1 53.5 48 111.5

10 441083 KANCHI1 441127 SVCTAM41 1 77.9 48 162.3

11 441137 GSIPCOT4 441156 TULYSAN1 1 53.2 48 110.9

12 441017 KORATR21 441088 TIRMUDIVAKAM110.00 1 97.5 45 216.7

Line Loading Above SIL

Annexure-III

Page 14 of 34

Conclusion

• In the Chennai Island , due to uncertainty of generation i.e. vallur/ NCTPS which are taken out incase of less demand/High RE and also as seen from the RTSD case data it is most of the time a deficit island with a average mismatch of almost 100%.

• With the commissioning of the upcoming generators North Chennai Ext, Ennore TPS ext the Islanding scheme needs to be further reviewed.

• In case of successful Island formation the transmission lines are in the normal limits

• This Island has the minimum number of line tripping's i.e. 27

Annexure-III

Page 15 of 34

Kudankulam Island

• Kudankulam Island Size 5400 MW

• Major Generators• Kudankulam TPS

• NTPL TPS

• Coastal Energen TPS

• TTPS

• Sabaragiri

• Major Load Centres• Trivandrum

• Madurai

• Tirunelvelli

Annexure-III

Page 16 of 34

Load Generation Balance DetailsS.No Area Generation (MW) Load (MW) Losses

1 NPC_SR 1847 0 0

2 COASTL-ENERG 1126.1 0 2.2

3 TN_THERMAL 957.3 0 0

4 NTPL 946 0 2.5

5 KL_HYDRO 364.9 0 0

6 TN_WIND 303.1 0 0

7 TN_NCE 258.3 0 0

8 TN_GAS 167 0 0

9 TN_HYDRO 141.8 0 0

10 MYTRAH 101.3 0 0

11 GREEN INFRA 50.7 0 0

12 ORANGE 50.3 0 0.1

13 TN_IPP 45.2 0 0

14 KL_IPP 9 0 0

15 TN_STU 0 4479 260

16 KL_STU 0 1510 47.3

17 TOTALS 6367 5998.6 369

S.No Bus Number Generator NameGeneration

(MW)Installed

Capacity (MW)

1 444017 KKNPP 400.00 1847 2000

2 444023 COASTAL ENER400.00 1126.1 1200

3 442087 TTPS2 230.00 957.3 1050

4 444021 NTPL 400.00 946 1000

5 452003 SABARIGIRI 220.00 320.8 335

6 449004 GIREL 0.6750 51 250

7 449007 MYTRAH 0.6750 51 250

8 449010 BETAM 0.6750 51 250

9 449001 ORANGE 0.6750 50 200

10 442030 INDARCPP 230.00 110.6 189

11 441539 ARKCPP1 110.00 120.6 152

12 441514 VGTPP11 110.00 65.3 102

13 441515 VGTPP12 110.00 63.3 98

14 NCE 258

S.No Area Generation (MW) Load (MW) Losses (MW)

1 KKNPP 1847 0 7.3

2 NTPL 946 0 0

3 COASTL-ENERG 1126.1 0 1.1

4 TN-TRICHY 66 828.6 73

5 TN-COIMBATOR 2.7 122.3 1.4

6 TN-ERODE 0 21 0

7 TN-MADURAI 389.9 2054 157

8 TN-TIRNLVELI 1616.4 1461 74.2

9 KERALA 373.9 1510 55

10 TOTALS 6367 5998 369

Annexure-III

Page 17 of 34

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Kudankulam Island Load Generation Balance

Island Generation Island Load Margin Available w.r.t Generation (%) Series4

Average Generation

Average Load

Average Mismatch

4953

3527

26

Annexure-III

Page 18 of 34

S.NoVoltage

Level (kV)

From Bus Number

From Bus NameTo Bus


1 400 444015 PUGALUR 444014 NEYVELI-II T1

2 400 444015 PUGALUR 444016 NEYVELI2EXP T1

3 400 444005 TIRUNELVELLI400.00 444004 MYWADI T1

4 400 444005 TIRUNELVELLI400.00 444004 MYWADI T2

5 400 444010 CHIKKANURANI400.00 444004 MYWADI T1

6 400 444010 CHIKKANURANI400.00 444009 ALUNDUR T1

7 400 444012 KARAIKUDI 444009 ALUNDUR T1

8 400 444015 PUGALUR 444007 KALIVNDPATTU400.00* T1

9 400 444015 PUGALUR 444007 KALIVNDPATTU400.00* T2

10 400 444028 TUTICORINPS 444026 DHARAMAPURI H1

11 400 444028 TUTICORINPS 444026 DHARAMAPURI H2

12 400 444005 TIRUNELVELLI400.00 454004 COCHIN Q1

13 400 444005 TIRUNELVELLI400.00 454004 COCHIN Q2

14 230 442064 PUDUKOT2 442010 ALUNDR42 1

15 230 442065 PUGALR42 442010 ALUNDR42 1

16 230 442065 PUGALR42 442153 KURKATHI 1

17 230 442066 PUGALUR2 442063 PUDANS2 1

18 230 442073 SEMBATY2 442050 MYVADY42 1

19 230 442108 KRMBYAM 442089 TVARUR2 1

20 230 442161 MONDIPATTY 442010 ALUNDR42 1

S.NoVoltage

Level (kV)

From Bus Number

From Bus NameTo Bus


21 220 452003 SABARIGIRI 452036 AMBLMGL 1

22 220 452017 NEW Pallom 452002 IDUKKI 1

23 220 452019 PALLOM 452036 AMBLMGL 1

24 220 452006 Brahmapuram 452019 PALLOM 1

25 220 452006 Brahmapuram 452003 SABARAGIRI 1

26 110 441452 SEMBATY1 441441 PUDHUR 1

27 110 441744 PUGALR21 441335 KABILARMALAI110.00* 1

28 110 441744 PUGALR21 441778 KODUMUD1 1

29 110 441755 IYERMAL1 441779 TRICHY1 1

30 110 441757 EACHNKOTAI 441760 TANJOR21 1

31 110 441764 MANAPAR1 441791 ALUNDR21 1

32 110 441780 PDKOTA21 441718 TNALLUR1 1

33 110 441788 KKLGTPP1 441749 TVARUR21 1

34 110 441789 MANARKU1 441749 TVARUR21 1

35 110 441790 PATUKOT1 441760 TANJOR21 1

36 110 441806 KAVLKAP1 441748 TRICHY21 1

37 110 441827 RENGPM21 441472 OTANCHA1 1

38 110 451135 PLLM1 451010 AYKM 1

39 110 451135 PLLM1 451109 MRF 1

40 110 451151 PUPR1 451168 TKP 1

Transmission Lines TrippedAnnexure-III

Page 19 of 34


Line Loading Above Thermal Limit

S.NoFrom Bus Number

From Bus NameTo Bus


Loading (MW)

Thermal Rating(MW)

% Loading (%)

1 442016 CHECKN42 442073 SEMBATY2 1 288.8 213 135.6

2 442016 CHECKN42 442149 KINMGLAM 2 357.2 213 167.7

3 442031 KARAI42 442064 PUDUKOT2 1 252.8 213 118.7

4 442032 KARAIKD2 442108 KRMBYAM 1 217.5 213 102.1

5 442079 SRPUDUR2 442098 KUDMKLM 1 284.6 213 133.6

6 442085 TSIPCOT2 442087 TTPS2 1 255 213 119.7

7 452003 SABARIGIRI 452019 PALLOM 1 255.6 213 120

8 452004 EDAMON 452011 KUNDARA 1 293.6 213 137.8

9 441645 TSIPCO21 442085 TSIPCOT2 1 102.1 100 102.1

10 441645 TSIPCO21 442085 TSIPCOT2 2 102.1 100 102.1

11 441827 RENGPM21 442068 RENGPRM2 1 124 100 124

12 441827 RENGPM21 442068 RENGPRM2 2 124 100 124

13 441499 KARAIK21 442032 KARAIKD2 1 50 50 100.1

14 441499 KARAIK21 442032 KARAIKD2 3 50 50 100.1

Annexure-III

Page 20 of 34

Conclusion

• In the Kudankulam Island, there is High Renewable Energy Installed at Tirunelveli , and more addition is taking place. This is the only island in SR which is average 25% surplus, however in case of UFR and df/dt the island will be even more surplus.

• The Behaviour of Renewable generation in case of High frequency is the key factor deciding the successful island formation

• The upcoming generating units of Udangudi, SPIC and HVDC Raigarh –Pugalur the islanding scheme would have to be reviewed.

• The following transmission are loaded beyond the thermal limits• 230kV Checknoorani – sembatty and 230kV checknoori – kinimangalam• 230kV Karaikudi – pudukottai and 230kV Karaikudi – Karambyam• 230kV Kudankulam – SRPudur .

Annexure-III

Page 21 of 34

Neyvelli Island

• Neyvelli Island 7500 MW

• Major Generators• IL&FS• NNTPS• NLCTS2• Mettur Stage 3

• Major Load • Puducherry• Trichy• Coimbatore• Erode

Annexure-III

Page 22 of 34

Load Generation Balance DetailsS.No Area

Generation (MW)

Load (MW) Losses (MW)

1 TS_STU 0 0 0.1

2 TN_STU 0 7025.3 175

3 TN_HYDRO 1050.5 0 0.6

4 TN_THERMAL 1428.4 0 0

5 TN_IPP 373.2 0 0

6 TN_GAS 165.9 0 0

7 TN_NCE 467.3 0 0.1

8 TN_WIND 211 0.2 0

9 TN_SOLAR 0 0 0

10 PONDY_STU 0 322.1 2.6

11 PGCIL_CTU 0 0 27.4

12 NEYVELI_SR 2674 0 4.9

13 ILFS 1190.4 0 3

14 TOTALS 7561 7347.6 213

S.No AreaGeneration

(MW)Load (MW) Losses (MW)

1 NEYVELI-ALL 2674.4 231 19

2 ILFS 1190.4 0 1.5

3 TN-CHENNAI 0 0 0

4 TN-VELLORE 49.6 441.2 4

5 TN-VILLUPURM 355.5 1091.8 35.1

6 TN-TRICHY 405.1 1168.5 34.9

7 TN-COIMBATOR 1197 2345.3 44.2

8 TN-ERODE 1643 1606.5 44.7

9 TN-MADURAI 37.2 66.8 2.5

10 TN-TIRNLVELI 8.2 74.3 0

11 PONDY 0 322.1 4.7

12 TOTALS 7561.3 7347.6 213.7

S.No Bus Number Generator NameGeneration

(MW)

Installed Capacity

(MW)

1 444032 ILFS 1190.4 1200

2 444027 NNTPS 471.3 1000

3 442047 MTPS2 833.3 840

4 444014 NEYVELI-II 665.5 840

5 442053 NLC22 624.9 630

6 444020 METTUR-III 595.2 600

7 444016 NEYVELI2EXP 496 500

8 444013 NEYVELI1EXP 416.6 420

9 442028 KADMPRI2 198.4 400

10 442051 STCMS 248 250

11 441213 KUNDAH21 208.3 210

12 442040 KUNDAH32 178.6 180

13 441814 KUTAGTP1 165.9 167.25

14 441409 MALCO1 156.6 157

15 442067 PUSHEP2 99.2 150

16 441824 ABAN1 125.2 126.23

17 442041 KUNDAH42 99.2 100

18 441164 KUNDAH11 71.4 72

19 441167 ALIYAR1 66.1 67

20 441736 CHETCEM1 55.1 55.56

Annexure-III

Page 23 of 34

-100

-50

0

50

100

150

200

0

1000

2000

3000

4000

5000

6000

7000

8000

7/1/2019 8/1/2019 9/1/2019 10/1/2019 11/1/2019 12/1/2019 1/1/2020

Neyvelli Island Load Generation Balance


Average Generation

Average Load

Average Mismatch

4483

5300

-20 %

Annexure-III

Page 24 of 34


S.NoVoltage Level

(kV)From Bus Number


1 400 444039 PALAVADI 444031 TIRUVALAM-TN Q1

2 400 444039 PALAVADI 444031 TIRUVALAM-TN Q2

3 400 464001 PONDY 444018 S V CHATHRAM T1

4 400 444026 DHARAMAPURI 434005 SOMANAHALLI Q1

5 400 444026 DHARAMAPURI 434005 SOMANAHALLI Q2

6 400 444026 DHARAMAPURI 434008 TUMKUR Q1

7 400 444026 DHARAMAPURI 434008 TUMKUR Q2

8 400 444003 SALEM-PG 444006 HOSUR T1

9 400 444003 SALEM-PG 444006 HOSUR T2

10 400 444004 MYWADI 444005 TIRUNELVELLI T1

11 400 444004 MYWADI 444005 TIRUNELVELLI T2

12 400 444004 MYWADI 444010 CHIKKANURANI T1

13 400 444009 ALUNDUR 444010 CHIKKANURANI T1

14 400 444009 ALUNDUR 444012 KARAIKUDI T1

15 400 444014 NEYVELI-II 444015 PUGALUR T1

16 400 444016 NEYVELI2EXP 444015 PUGALUR T1

17 400 444026 DHARAMAPURI 444028 TUTICORINPS H1

18 400 444026 DHARAMAPURI 444028 TUTICORINPS H2

19 400 444004 MYWADI 454005 PALAKKAD T1

20 400 444004 MYWADI 454005 PALAKKAD T2

21 230 442010 ALUNDR42 442064 PUDUKOT2 1

22 230 442010 ALUNDR42 442065 PUGALR42 1

23 230 442010 ALUNDR42 442161 MONDIPATTY 1

24 230 442042 MTRAUTO 442003 HOSUR2 1

25 230 442050 MYVADY42 442073 SEMBATY2 1

S.NoVoltage Level

(kV)From Bus Number


26 230 442063 PUDANS2 442066 PUGALUR2 1

27 230 442077 SPET 442014 ARNI2 1

28 230 442077 SPET 442097 VINAMAN2 1

29 230 442077 SPET 442123 TRVLM-N 1

30 230 442077 SPET 442134 GURUBRUBALLI 1

31 230 442089 TVARUR2 442108 KRMBYAM 1

32 230 442096 VILUPRM2 442007 ACHARAP2 1

33 230 442150 PALLAVADI 442134 GURUBRUBALLI 2

34 230 442153 KURKATHI 442065 PUGALR42 1

35 230 442180 UDANAPALLI 442023 HOSUR42 1

36 230 442005 UDMLPT2 452002 IDUKKI 1

37 110 441335 KABILARMALAI 441744 PUGALR21 1

38 110 441472 OTANCHA1 441827 RENGPM21 1

39 110 441718 TNALLUR1 441780 PDKOTA21 1

40 110 441748 TRICHY21 441806 KAVLKAP1 1

41 110 441749 TVARUR21 441788 KKLGTPP1 1

42 110 441749 TVARUR21 441789 MANARKU1 1

43 110 441760 TANJOR21 441757 EACHNKOTAI 1

44 110 441760 TANJOR21 441790 PATUKOT1 1

45 110 441778 KODUMUD1 441744 PUGALR21 1

46 110 441779 TRICHY1 441755 IYERMAL1 1

47 110 441791 ALUNDR21 441764 MANAPAR1 1

48 110 441871 SPET1 441944 ADAMANGL 1

49 110 441871 SPET1 441945 POLUR 1

50 110 441874 SPET21 441865 TIRUPTUR 1

51 110 441895 RAJSRE1 441897 THAYANUR 1

52 110 441916 DHARMPR1 441886 ADIYAMA1 1

53 110 441958 VILPRM21 441899 KANJANUR 1

Annexure-III

Page 25 of 34


S.NoFrom Bus Number

From Bus NameTo Bus


Loading (MW)

SIL Rating(M

W)

% Loading (%)

1 444014 NEYVELI-II 444027 NNTPS T1 529.8 517 102.5

2 442166 NNTPS 442177 NLCTNEB2 T1 212.5 184 115.5

3 442166 NNTPS 442177 NLCTNEB2 T2 212.5 184 115.5

4 442010 ALUNDR42 442084 TRICHY2 2 165.5 131 126.3

5 442017 CUDALRE2 442052 NLCTS12 1 172 131 131.3

6 442018 DEVKRCY2 442051 STCMS 1 155.2 131 118.5

7 442025 INGUR2 442047 MTPS2 1 182.7 131 139.5

8 442026 KADALAN2 442053 NLC22 1 172.2 131 131.5

9 442028 KADMPRI2 442107 ALIYAR 1 135.2 131 103.2

10 442041 KUNDAH42 442088 TUDIYLR2 1 186.7 131 142.5

11 442047 MTPS2 442105 MTRIII 1 148.1 131 113

12 442047 MTPS2 442127 ANTHIYUR 1 135.4 131 103.3

13 442051 STCMS 442053 NLC22 1 174.7 131 133.3

14 442051 STCMS 442060 PERMBLR2 1 145.3 131 110.9

15 442052 NLCTS12 442090 TVMALAI2 1 143.8 131 109.8

16 442052 NLCTS12 442166 NNTPS 1 250.4 131 191.2

17 442052 NLCTS12 442166 NNTPS 2 295.7 131 225.7

18 442053 NLC22 442166 NNTPS 1 136 131 103.8

19 442053 NLC22 442166 NNTPS 2 134.6 131 102.7

20 442070 SALEM42 442092 UNJANAI2 1 150 131 114.5

Line Loading Above SIL Limit

Annexure-III

Page 26 of 34

Simhadri Island

• Neyvelli Island 7500 MW

• Major Generators• IL&FS• NNTPS• NLCTS2• Mettur Stage 3

• Major Load • Puducherry• Trichy• Coimbatore• Erode

Annexure-III

Page 27 of 34


Bus Number Generation (MW) Installed Capacity (MW)

414012 SIMHADRI-I 400.00 993 1000

414020 SIMHADRI-II 400.00 844 1000

414027 HINDUJA 400.00 450 1040

412017 LOWERSILERU 220.00 159 460

412087 UPPERSILERU 220.00 109 240

412041 JEGURUPADU 220.00 82 216

412023 MRS_VIZAG SP220.00 59 287

412022 VIJJESWRAM-I220.00 56 100

412045 VGTPS-II 220.00 38 113

411054 MKD 132.00 30 84

412042 SPECTRUM 220.00 27 46

412091 SARDA AL-NEW220.00 26 80

411057 NAVW 132.00 20 40

412010 DONKARAI 220.00 15 25

411099 GOLD 132.00 13 100

411195 NCS 132.00 8 22

411168 VATSA 132.00 3 17

411237 RVK 132.00 3 5

411351 SANV_BRANDI 132.00 3 10

411032 GVD 132.00 1 13

TOTAL 2938 4897

S.No AreaGeneration

(MW)Load (MW)

Losses (MW)

1 AP_STU 0 2869.9 63.42 AP_HYDRO 312 0 0

3 AP_THERMAL 94.2 0 0

4 AP_GAS 171.3 0 0

5 AP_IPP 523.2 7.7 0

6 AP_WIND 0 0 0.8

7 AP_SOLAR 0 0 08 PGCIL_CTU 0 0 0

9 NTPC_SR 1839.8 0 010 TOTALS 2941.8 2877.6 64.2

Annexure-III

Page 28 of 34

-200

-100

0

100

200

300

400

500

600

0

500

1000

1500

2000

2500

3000

3500

7/1/2019 8/1/2019 9/1/2019 10/1/2019 11/1/2019 12/1/2019 1/1/2020

Mis

mat

ch (

%)

Load

/gen

erat

ion

(M

W)

Simhadri Island Load Generation Balance


Average Generation

Average Load

Average Mismatch

1819

2402

-41

Annexure-III

Page 29 of 34


LINES TRIPPED TO FORM ISLLAND

400KV LINES

FROM BUS NO FROM BUS NAME TO BUS NO TO BUS NAME CKT ID

414045 MARADAM 414039 SRIKAKULAM I

414045 MARADAM 414039 SRIKAKULAM II

414011 KALPAKA 424004 KHAMMAM I

414011 KALPAKA 424020 ASUPAKA I

414042 KV KOTA 424016 SURYAPETA I

414042 KV KOTA 424016 SURYAPETA II

414009 GAJUWAKA-PG 254025 JEYPORE I

414009 GAJUWAKA-PG 254025 JEYPORE II

414014 VEMAGIRI 414021 SATTENAPALLY I

414014 VEMAGIRI 414008 NUNNA I

414014 VEMAGIRI 414040 VEMAGIRI-PG I

414014 VEMAGIRI 414040 VEMAGIRI-PG II

414009 GAJUWAKA-PG 414040 VEMAGIRI-PG I

414020 SIMAHADRI-II 414040 VEMAGIRI-PG I

414020 SIMAHADRI-II 414040 VEMAGIRI-PG II

220KV LINES

412005 BHIMADOLE 412038 NUNNA I

412064 BHIMAVARAM 412050 GUDIVADA I

412064 BHIMAVARAM 412050 GUDIVADA II

412017 LOWER SILERU 422085 KTPS V I

412017 LOWER SILERU 422005 KTPS O&M I

412087 UPPER SILERU 252001 BALIMALA I

412067 KV KOTA 412025 VTS I

132KV LINES

411050 K.V.KOTA 421275 ASWARAOPETA I

411209 K.V.KOTA 220KV 421275 ASWARAOPETA I

411098 ELURU 411047 KANUMOLU I

411196 PEDAVEGI 411047 KANUMOLU I

Annexure-III

Page 30 of 34


Line Loading Above SIL Limit

S.NoFrom Bus Number

From Bus Name

To Bus Number

To Bus Name Circuit IDLine Flow

SIL % of SIL

1 412006 BOMMUR 412017 LOWERSILERU 1 203 131 155

2 412015 GAZUWAKA 412024GAZUWAKA-

PG1 140 131 107

3 412024GAZUWAKA-

PG412055 PARAWADA 1 202 131 154

4 412067 K V KOTA 412122 K V KOTA 1 135 131 103

5 412067 K V KOTA 412122 K V KOTA 2 135 131 103

Annexure-III

Page 31 of 34

Adaptive Islanding (Future way forward)

Crux : Island boundaries are decided in Real Time

Requirements for adaptive islanding:

• Real Time State Estimator output (upto 110 kV):

Provides the base case scenario for the islanding algorithm

• Islanding Algorithm:

Obtains the island boundaries using SE base case

• Communication infrastructure to all substations (upto 110 kV):This is required as the boundaries are decided in Real Time

Annexure-III

Page 32 of 34

THANK YOU

Annexure-III

Page 33 of 34

Questions ?• Size of the Island and mismatch . Generation/ Load >= 1.2 Rule to be

strictly followed. Basic motivation of island is for faster restoration , thus protection of Key generating complex to be a priority.

• Fewer transmission lines tripping and Network electrically radial in nature key for successful Island, which inherently would form a island.

• Behaviour of Lift Irrigation during low frequency

• Behaviour of synchronous generator’s and RE during High Frequency• Droop settings and frequency value for generation reduction

• Isolation of generation in stages ??

• The accurate Mapping of UFR and df/dt loads in the PSS/E case.

Annexure-III

Page 34 of 34

january 2020 - southern regional power committee - govt of ... · 55 132 421046 pochampad 421075...

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