के वि प्रा - Southern Regional Power ... · 12 Shri S.Venugopal Director (Finance),...

CEA

SOUTHERN REGIONAL POWER

COMMITTEE

BENGALURU

ANNUAL REPORT

2014-15

C O N T E N T S

COMMITTEE MEMBERS INDEX OF ANNEXURES INDEX OF EXHIBITS HIGHLIGHTS & SALIENT FEATURES

CHAPTER - 1 CONSTITUTION, FUNCTIONS & ORGANISATIONAL SET UP OF SOUTHERN REGIONAL POWER COMMITTEE CHAPTER - 2 REGIONAL GRID PERFORMANCE CHAPTER - 3 GRID DISTURBANCES AND PROTECTION RELATED ACTIVITIES CHAPTER - 4 COMMERCIAL & ENERGY ACCOUNTING ACTIVITIES CHAPTER - 5 OPERATION, PROTECTION & SYSTEM STUDIES ACTIVITIES CHAPTER - 6 MEETINGS HELD CHAPTER - 7 REPORTS AND CERTIFICATION CHAPTER - 8 IMPLEMENTATION OF OFFICIAL LANGUAGE POLICY

CONSTITUTION OF SOUTHERN REGIONAL POWER COMMITTEE (As on 31.03.2015)

Chairperson : Shri G.Kumar Naik

Managing Director, KPTCL, Bengaluru

MEMBERS 1 Shri G.Kumar Naik Chairperson, SRPC & Managing Director, KPTCL, Bengaluru

2 Shri Major Singh Member (GO& D) I/c, CEA, New Delhi

3 Shri K.Vijayanand Chairman & Managing Director, APTRANSCO, Hyderabad

4 Shri K.Vijayanand Managing Director, APGENCO, Hyderabad

5 Shri Mohd. Anwaruddin Director (Grid & Tr. Management), APTRANSCO, Hyderabad

6 Shri T.H.M.Kumar Managing Director, PCKL, Bengaluru

7 Shri M.Maheshwar Rao Managing Director, KPCL, Bengaluru

8 Shri S.Sumanth Director (Transmission), KPTCL, Bengaluru

9 Shri M.T.Manjunath Chief Engineer (E), SLDC, KPTCL, Bengaluru

10 Shri M.Sivasankar CMD, KSEB, Thiruvananthapuram

11 Shri K.Venugopal Director (Tr. & System Opn.), KSEB, Thiruvananthapuram

12 Shri S.Venugopal Director (Finance), KSEB, Thiruvananthapuram

13 Shri M.A.Rawther Director (Distribution & Safety), KSEB, Thiruvananthapuram

14 Dr. M.Saikumar Chairman cum Managing Director, TNEB, Chennai

15 Shri K.Rangaraj Managing Director, TANTRANSCO, Chennai

16 Shri P.S.Ganesh Director (Opn), TANTRANSCO, Chennai

17 Shri P.Annadurai Director (Distribution), TANGEDCO, Chennai

18 Shri D.Prabhakar Rao Chairman & Managing Director, TSTRANSCO, Hyderabad

19 Shri D.Prabhakar Rao Chairman & Managing Director, TSGENCO, Hyderabad

20 Shri G.Raghuma Reddy CMD,TSSPDCL, Hyderabad

21 Shri P.R.Meena Secretary (Power), Govt. of Puducherry, Puducherry

22 Shri R.P.Sasmal Director (Operations), PGCIL, Gurgaon, Haryana

23 Shri I.J.Kapoor Director (Commercial), NTPC, New Delhi

24 Shri S.Rajagopal Director (Power), NLC, Neyveli

25 Director (Operations), NPCIL, Mumbai

26 Shri S.K.Soonee CEO, POSOCO, New Delhi

27 Shri P.R.Raghuram Executive Director, POSOCO, SRLDC, Bengaluru

28 Shri Subhash Muley CEO, NTECL, Vallur

29 Shri MCS Reddy Chief Operating Officer, UPCL Bengaluru

30 Shri Satish Jindal Director & COO (Trading), JSWEL, New Delhi

31 Shri Sunil Agrawal Director, GMR Energy Trading Limited, Mumbai

32 Shri S.R.Bhat Member Secretary, SRPC, Bengaluru

ANNEXURES

I Officers of SRPC as on 31.03.2015 II Monthly Demand Pattern & Shortages during 2014-15 III Month wise Energy Requirement, Consumption and Shortages

during 2014-15 IV Load Factor during 2014-15 V Details of Power Cuts in Southern Region during 2014-15 VI Installed Capacity in Southern Region as on 31.03.2015 and

Generation during 2014-15 VII Installed Capacity in Southern Region from 2010-11 to 2014-15 VIII Performance of Thermal/Nuclear Power Stations in Southern

Region during 2014-15 IX Outages of Thermal/Nuclear Power Stations during 2014-15 X Frequency Profile during 2014-15 XI Operation of Inter-State / Inter-Regional Tie Lines during 2014-15 XII Entitlements / Schedule / Actual Drawal, Energy Exchanges,

Energy Wheeled during 2014-15 XIII Allocation of shares from Central Sector Stations to constituents

of Southern Region as on 31.03.2015 XIV Particulars of Major Hydel Reservoirs in Southern Region during

2014-15 XV Generating Units Commissioned during the year 2014-15 XVI Progress of Generation Schemes as on 31.03.2015 XVII 765 KV, 400 KV and 220/230 KV Substations Commissioned during

2014-15

XVIII Progress of construction of 220 KV / 230 KV and above Sub-

Stations during 2014-15 XIX Transmission Lines commissioned during the year 2014-15 XX Progress of Transmission lines under construction in Southern

Region XXI Installation of Shunt Capacitors in Southern Region during the year

2014-15 XXII Voltage Profile at selected nodes of 400 KV Regional Grid during

2014-15 XXIII Meetings held during the year 2014-15 XXIV Grid Incidents / Disturbances occurred in Southern Region during

2014-15

EXHIBITS

I Power Map of Southern Region as on 31.03.2015

II Growth in Installed Capacity in Southern Region during

2010-11 to 2014-15

III Growth of Peak Demand during the year 2010-11 to 2014-15

IV Annual Load Duration Curve of Southern Region for 2014-15

V Demand and Frequency Curves for Regional Maximum

Demand Day during 2014-15

VI Demand and Frequency Curves for Regional Minimum

Demand Day during 2014-15

VII Generation in Southern Region during 2013-14 and 2014-15

VIII Growth of Generation in Southern Region from 2010-11 to

2014-15

IX Growth of Gross Generation from 2010-11 to 2014-15

X Particulars of Important Reservoirs of Southern Region during

2014-15

HHIIGGHHLLIIGGHHTTSS

&&

SSAALLIIEENNTT

FFEEAATTUURREESS

/ HIGHLIGHTS

/ Installed Capacity (Source CEA) :

/ Hydro : 11,398.03 MW

/ Gas : 4,962.78 MW

/ Thermal (Coal) : 30,342.50 MW

/ Nuclear : 2,320.00 MW

(++ + ) / Total Installed

Capacity (H + G + Th + Nu) : 49,023.31 MW

/ Diesel : 939.32 MW

/ Wind+RES : 15,117.17 MW

/ Total (Source CEA) : 65,079.80 MW

/ Net increase over previous year : 11.57 %

/ Demand :

/ Maximum peak load catered : 38,090 MW

/ Net increase over previous year : + 1105 MW

/ Maximum Unrestricted Demand : 40,001 MW

/ Minimum Demand : 21,044 MW

(. ) / Demand Shortage ( MW) : 401 to 3,396 MW

(%) / Demand Shortage (%) : 01.13 to 08.69 %

/ System Load Factor : 84 %

/ Gross Energy Generation : 2,83,548 MU

/ Net increase over previous year : + 09.77 %

/ Energy Consumption (Gross) : 2,80,122 MU

/ Unrestricted Energy Requirement : 2,91,792 MU

(%) / Energy Shortage (%) : 02.03 to 08.19 %

/ Frequency Regime :

... 49.9 Hz 50.05 Hz

Time of frequency remained within IEGC Range between

49.9 Hz to 50.05 Hz : 52.16 %

/ Actual energy exchanges :

/ Energy Export to WR : 0.077 MU

/ Energy Export to ER : 32.625 MU

/ Energy Import from WR : 10,464.668 MU

/ Energy Import from ER : 7,204.931 MU

Break-up of Installed Capacity in Southern Region (Fuel wise) according to CEA as on 31.03.2015

31 2015

Total Installed Capacity in Southern Region = 65079.8 MW

Hydro11398.03Wind+R.E.S

15117.17

Hydro Thermal (Coal) Gas Diesel Nuclear Wind + R.E.S

Thermal(Coal)30342.50

Gas4962.78

Diesel939.32

Nuclear2320.00

All Units in MW.R.E.S = Renewable Energy Source

Staets / Sectors Andhra Pradesh Karnataka Kerala Tamil Nadu Telangana Puducherry Central SectorTotal Installed Capacity 9733.52 13124.45 2515.89 17935.90 7667.96 32.50 14069.58

31.03.2015

Installed Capacity of States in Southern Region as on 31.03.2015 in MW (according to CEA)

(... )

Total Installed Capacity in Southern Region = 65079.8 MW

Hydro1721.99


Gas1672.65

Diesel16.97

Nuclear0.00 Wind+R.E.S1946

/AndhraPradesh

Hydro3599.80


Gas0.00

Diesel234.42

Nuclear0.00

Wind+R.E.S4510.23

/Karnataka

Diesel256.44

Nuclear0.00Wind+R.E.S

203.95

/Kerala

Hydro2182.20

/TamilNadu

Hydro1881.50Thermal(Coal)

0.00

Gas174.00


Gas1026.30Diesel411.66

Nuclear0.00

Wind+R.E.S8395.74

Hydro2012.54


Gas1697.75

Diesel19.83

Nuclear0.00Wind+R.E.S61.25

/TelanganaHydro0.00


Gas359.58Diesel0.00 Nuclear2320.00

Wind+R.E.S0.00

/CentralSector

MAX DEMAND : 38090 MW on 27.03.2015 , MAX U.R DEMAND = 40001 MW

/ Demand

/ Southern Region2014-15 Month wise Maximum Demand and Energy Requirement

during 2014-15

30000

32000

34000

36000

38000

40000

42000

/ A

pril

/

May

/ Jun

e

/ Jul

y

/ A

ugus

t

/ S

epte

mbe

r

/

Oct

ober

/ N

ovem

ber

/

Dec

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r

/ J

anua

ry

/ Feb

ruar

y

/ Mar

ch

MW

Simultaneous Actual - 2013-14 Unrestricted - 2013-14 Simultaneous Actual - 2014-15 Unrestricted - 2014-15

Total Consumption during 2014-15 = 280122 MU, Energy Requirement (2014-15): 291792 MU / Energy Requirement

20000

21000

22000

23000

24000

25000

26000

27000

28000

/ A

pril

/ May

/ Jun

e

/ Ju

ly

/ A

ugus

t

/ S

epte

mbe

r

/

Oct

ober

/ N

ovem

ber

/

Dec

embe

r

/ J

anua

ry

/ Feb

ruar

y

/

Mar

ch

MU

Actual 2013-14 Unrestricted 2013-14 Actual 2014-15 Unrestricted 2014-15

Simultaneous Actual 2013 14 Unrestricted 2013 14 Simultaneous Actual 2014 15 Unrestricted 2014 15

MAX DEMAND : 7100 MW on 17.03.2015, MAX U.R DEMAND = 7391 MW

/ Andhra Pradesh2014-15 Month wise Maximum Demand and Energy Requirement

during 2014-15

/ Demand

4000

6000

8000

10000

12000

14000

16000

/ A

pril

/

May

/ Jun

e

/ Jul

y

/ A

ugus

t

/ S

epte

mbe

r

/

Oct

ober

/ N

ovem

ber

/

Dec

embe

r

/ J

anua

ry

/ Feb

ruar

y

/ Mar

ch

MW


Total Consumption during 2014-15 = 50366 MU, Energy Requirement (2014-15) : 52262 MU

Note : Actual Demand met, Unrestricted Demand, Actual Energy and Energy Requirement for the year 2013-14 are inclusive of Andhra Pradesh and Telangana.

/ Energy Requirement

3500

4500

5500

6500

7500

8500

9500

/ A

pril

/ May

/ Jun

e

/ Ju

ly

/ A

ugus

t

/ S

epte

mbe

r

/

Oct

ober

/ N

ovem

ber

/

Dec

embe

r

/ J

anua

ry

/ Feb

ruar

y

/

Mar

ch

MU



/ Karnataka2014-15 Month wise Maximum Demand and Energy Requirement

during 2014-15

/ Demand

7000

7500

8000

8500

9000

9500

10000

10500

/ A

pril

/

May

/ Jun

e

/ Jul

y

/ A

ugus

t

/ S

epte

mbe

r

/

Oct

ober

/ N

ovem

ber

/

Dec

embe

r

/ J

anua

ry

/ Feb

ruar

y

/ Mar

ch

MW


Total Consumption during 2014-15 = 62037 MU, Energy Requirement (2014-15) : 64754 MU / Energy Requirement

4000

4500

5000

5500

6000

6500

/ A

pril

/ May

/ Jun

e

/ Ju

ly

/ A

ugus

t

/ S

epte

mbe

r

/

Oct

ober

/ N

ovem

ber

/

Dec

embe

r

/ J

anua

ry

/ Feb

ruar

y

/

Mar

ch

MU




/ Kerala2014-15 Month wise Maximum Demand and Energy Requirement

during 2014-15

/ Demand

2800

3000

3200

3400

3600

3800

4000

/ A

pril

/

May

/ Jun

e

/ Jul

y

/ A

ugus

t

/ S

epte

mbe

r

/

Oct

ober

/ N

ovem

ber

/

Dec

embe

r

/ J

anua

ry

/ Feb

ruar

y

/ Mar

ch

MW



1400

1600

1800

2000

2200

/ A

pril

/ May

/ Jun

e

/ Ju

ly

/ A

ugus

t

/ S

epte

mbe

r

/

Oct

ober

/ N

ovem

ber

/

Dec

embe

r

/ J

anua

ry

/ Feb

ruar

y

/

Mar

ch

MU




/ Tamil Nadu2014-15 Month wise Maximum Demand and Energy Requirement

during 2014-15

/ Demand

10000

10500

11000

11500

12000

12500

13000

13500

14000

14500

/ A

pril

/

May

/ Jun

e

/ Jul

y

/ A

ugus

t

/ S

epte

mbe

r

/

Oct

ober

/ N

ovem

ber

/

Dec

embe

r

/ J

anua

ry

/ Feb

ruar

y

/ Mar

ch

MW



6000

6500

7000

7500

8000

8500

9000

9500

/ A

pril

/ May

/ Jun

e

/ Ju

ly

/ A

ugus

t

/ S

epte

mbe

r

/

Oct

ober

/ N

ovem

ber

/

Dec

embe

r

/ J

anua

ry

/ Feb

ruar

y

/

Mar

ch

MU




/ Telangana2014-15 Month wise Maximum Demand and Energy Requirement

during 2014-15

/ Demand

5500

6000

6500

7000

7500

8000

8500

/ A

pril

/

May

/ Jun

e

/ Jul

y

/ A

ugus

t

/ S

epte

mbe

r

/

Oct

ober

/ N

ovem

ber

/

Dec

embe

r

/ J

anua

ry

/ Feb

ruar

y

/ Mar

ch

MW



3500

3700

3900

4100

4300

4500

4700

4900

5100

5300

/ A

pril

/ May

/ Jun

e

/ Ju

ly

/ A

ugus

t

/ S

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r

/

Oct

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/ N

ovem

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/

Dec

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/ J

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/

Mar

ch

MU



30%

40%

50%

60%

70%

80%

90%

100%

%oftim

e

2014-15 SouthernGridFrequencyduring201415

>50.2Hz

50.05&

2014-15 Frequency Profile of Southern Region during 2014-15

30%

40%

50%

60%

70%

80%

90%

100%

50.50

51.54

43.94

49.01

47.84

54.59

52.38

54.17 4

8.23

54.23

61.39

58.86

12.85

19.66 14.36

12.40

10.62

13.85

19.73

27.19

23.25

22.95

23.31

21.50

0.61 1.92 1.04 0.47 0.32 0.38 0.70 1.66 2.56 2.74 1.13 1.43

%ofT

ime

>50.2Hz

50.05&

2014-15

Annual Load Factor (in percentage) of Southern Regional Systems for 2014-15

( )

40.00

50.00

60.00

70.00

80.00

90.0081.75

71.64

70.28

78.44 81.78

78.01

84.48

nualLo

adFactor(%

)

AnnualLoadFactor(%)

0.00

10.00

20.00

30.00

40.00

AndhraPradesh

Karnataka

Kerala TamilNadu

Telangana

Puducherry

SouthernRegion

Ann

2014-15 Plant Load Factor of Power Stations for 2014-15

/ Andhra Pradesh

40.00

50.00

60.00

70.00

80.00

90.00

100.00

83.24

76.56

77.34

86.29

82.40

78.06

77.16

88.25

P.L.F(%

)

0.00

10.00

20.00

30.00

201314 201415


/ Karnataka

40.00

50.00

60.00

70.00

80.00

90.00

100.00

69.84

36.79

68.83

77.59

45.10

66.29

P.L.F(%

)

0.00

10.00

20.00

30.00

40.00

Raichur(Unit17) Raichur(Unit8) Bellary(Unit 1&2) Yelahanka(Diesel)

0.00 0.00

201314 201415


/ Kerala

40 00

50.00

60.00

70.00

80.00

90.00

100.00

P.L.F(%

)

0.00

10.00

20.00

30.00

40.00

Brahmapuram(Diesel) Kozhikode(Diesel) RGCCP(Kayamkulam)

3.10

17.11

30.74

0.90

17.77

26.00

201314 201415


/ Tamil Nadu

40.00

50.00

60.00

70.00

80.00

90.00

100.00

40.51

85.79 88.04

80.34

74.33 77.22

83.42

84.71

57.50

77.21

53.14

69.09

P.L.F(%

)

0.00

10.00

20.00

30.00

20.31

201314 201415


/ Telangana

40.00

50.00

60.00

70.00

80.00

90.00

100.00

67.95

82.64

77.59 81.42

72.03

70.21

79.39

87.94

35.27

93.75

P.L.F(%

)

0.00

10.00

20.00

30.00

201314 201415


/ Central Generating Stations

40.00

50.00

60.00

70.00

80.00

90.00

100.0086.70

82.63

81.35

86.81 89.48

86.31

83.34

54.87

54.36

89.76 92.53

83.28 86

.44

92.00

81.58

86.07

67.90

49.43

43.75

P.L.F(%

)

0.00

10.00

20.00

30.00 28.63

201314 201415


Merchant Power Plants directly connected to ISTS...

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

80.12

54.99

81.37

59.07

61.34

6

P.L.F(%

)

0.00

10.00

20.0019

.26

201314 201415


...Major IPPs connected to State Grid

60.00

80.00

100.00

100.07

64.75

97.36

61.04

P.L.F(%

)

0.00

20.00

40.00

JSWEL,Bellary(SBU 1&2) UPCL(Unit 1&2)

201314 201415

Chapters

I

:

, , , ,

6,37,000

20

1 ,

1.1 :

29.11.2005 09.05.2008 25.05.2005

:

i) ( ) ( )

ii) , (),

(), (),

iii) , (),

(),

iv) / /

v) 1000 (

)

vi) , , (ii)

(iv) ,

vii) 500

viii) , -

1.2 :

:

i)

ii) - / -

iii) / :

iv) -

v)

vi) ,

vii) ,

viii)

1.3

31.03.2015 -

2014 -15

:

31.03.2015

.

1. 1 1

2. 3 3

3. / . 7 6

4. 9 4

5. 2 -

6. () 1 1

7. 1 -

.

1 1 -

2 ( ) 1 -

3 - 2 1

4 - 1 -

5. - 1 -

6. 1 -

6 - 5 3

7 - 1 1

8 1 1

9 1 1

10 1 -

11 4 1

12 2 1

13 ( ) 6 4

14 ( ) 2 2

15 1 -

16 ( ) 1 -

56 30

1.4 :

2014-15

:

(): - 2801 : `

31

[ 2801.01.04]

1 01.04.01 1,37,10,067

2 01.04.03 10,000

3 01.04.06 1,48,227

4 01.04.11 6,84,169

5 01.04.13 7,19,870

6 01.04.20 89,322

7 01.04.27 15,68,792

1,69,30,447

[ 2801.01.02]

1 01.02.01 98,05,440

2 01.02.03 9,900

3 01.02.06 37,157

4 01.02.11 7,18,484

5 01.02.13 22,47,598

6 01.02.20 89,385

7 01.02.26 7,792

8 01.02.50 4,49,409

1,33,65,165

-2801.02.17.27

II

2.1 :

2014-15 38,090 ,

1105 40,001 2014-

15 1.13% 8.69% 0.08%

13.80%, 3.44 % 12.00%, 3.41% 8.61%, 0.14%

9.30%, 2.38 % 16.46% 0% 11.57%

, ,

-

2015 845 /

2014-15 768 / , 2,80,122

, 6.08% 2.03% 8.19%

0.05% 10.58% 2.37% 8.13%,

0.72% 4.22%, 0.28% 7.52%, 2.21% 13.83%

0.01% 3.26% , ,

-

2014-15

-V

2.2 :

2014-15 65,080 ( :)

58,329 11.57

11,398 (17.51%), ++ 36,245 (55.70%), - 2,320

(3.56 %) + 15,117 (23.23%) 31.03.2014

24: 76

2014-15 XV

30.03.2015 (

) - VI 201011 2014-15

-VII 2010-11 2014-

15 -

2.3 :

2014-15 ( 2015 ) 38,090 ,

36,985 1,105 2014-15

, ,

:

2014-15

,

7100 (17.03.2015) 7391 (-14) 3432 (26.05.2014)

9790 (26.03.2015) 10216 (-14) 3871 (03.06.2014)

3602 (26.03.2015) 3777 ( -14) 1535 (02.08.2014)

13771 (24.06.2014) 14099 (-15) 5555 (23.10.2014)

6914 (28.03.2015) 8064 ( -14) 3168 (26.05.2014)

348.2 (29.05.2014) 389 ( -14) 118 (16.08.2014)

38090 (27.03.2015) 40001 ( -14) 21044 (25.11.2014)

( -), -

-

2010-11 2014-2015

-

2014-15 1.051 1.089

, -

-IV

( ) : -V

-VI

2.4 :

2014-15 , -VI

2014-15 , -VIII

2014-15 , ++, ,

: 32,203 (11.36%), 1,67,313 (59.01%), 13,409

(4.73%), 50 (0.02%) 70,573 (24.89%) 2013-14 2014-15

:-

2014 -15 +09.77%

2014-15 -X

-VII, VIII IX

31 2015 :

2013-14

()

2014-15

()

% (+)

% (-)

32,973 32,203 - 02.34 %

++ 1,54,194 1,67,313 + 08.51 %

9,760 13,409 + 37.39 %

+ () 45 50 + 10.61 %

61,337 70,573 + 15.06 %

2,58,310 2,83,548 + 09.77 %

: 160.43 26.03.2015

: 216.59 26.03.2015

: 70.99 26.03.2015

: 294.00 26.06.2014

: 159.22 26.03.2015

: 7.57 26.06.2014

: 908.06 26.03.2015

2.5 :

2014-15 49.92Hz 50.00HZ

, , 2013-14 49.84Hz 50.03Hz

52.16% (17.02.2014 49.90Hz 50.05Hz. )

, 2013-14 83.67%

:

*

I

E

G

C

F

r

*

*

* 17.02.2014 49.09Hz 50.5Hz

* 17.02.2014 49.07Hz 50.2Hz

2014-15 -X

2.6 :

- XXII ,

2014-15

2012-13 2013-14 2014-15

49.0 Hz 00.01 00.00 00.00

49.0 Hz 49.5 Hz 02.81 00.10 00.04

49.5 Hz 49.7 Hz 26.10 03.29 02.10

49.7 Hz 49.9 Hz 57.68 50.94

26.00

49.9 Hz 50 Hz 34.31

50 Hz 50.05 Hz 11.43 37.94

17.85

50.05 Hz 50.2 Hz 18.45

50.2 Hz 01.97 07.73 01.25

(17.02.2014 49.9 Hz

50.05 Hz.) 91.07 83.67 52.16

(Hz) 49.80 49.98 49.96

-XXI , 400

2.7 :

2014 -15 2011-12, 2012-13 2013-14

-VIII -IX

2011-12 2012-13 2013-14 2014-15

83.46 84.16 78.00

67.39

80.31

73.20 61.71 69.43 73.02

14.12 25.25 10.75 10.11

77.90 77.94 66.87 67.07

93.07 91.26 86.70 89.76

- 85.00 81.77 82.63 92.53

- 85.87 87.27 86.81 86.44

- 82.47 90.23 89.48 92.00

- 89.79 75.38 81.35 83.28

22.37 49.16 30.74 26.00

() --- 48.78 54.36 43.75

2.8 :

2014-15 2011-12, 2012-13 2013-14

:-

IV

2.9 :

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2014-15 -

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30.06.2014 765 - ,

30.06.2014 765 -

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31.03.2015

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http://www.srpc.kar.nic.in/website/2014/operation/patrolling.pdf

"All Uploads Operation Miscellaneous Transmission Line

Patrolling Protocol / Guidelines for Southern Region" ). (http://www.srpc.kar.nic.in/website/2014/operation/patrolling.pdf).

II. .167/ /2012 22.02.2014 :

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) ,

31.03.2015

3.5 :

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(i). : = 2500

:

1. = 2600

i. I = 3 X 200

ii. II = 3 X 500

iii. III = 1 X 500

2. : 1 X 500 = 500

(ii). :

= 3000

:

1. = 100

2. -1 = 630

3. = 1500

4. = 80

5. = 440

6. -2 = 1200

(iii). :

= 3600

:

1. 1 = 475

2. 2 = 1470

3. 1 = 420

4. = 250

5. = 1040

6. = 500 7. = 500

8. = 100

(iv). :

= 2100

:

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) 220

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2.5

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:

400 - 850

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:

400 - 800

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3.7 - :

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1 + 230 230 460

2 193 115 308

3 135 153 288

4 290 330 620

848 848 1696

3.8 - :

2014-15 ,

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******

IV

4.1 ( ) :

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2014

15

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02.06.2014 ''

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( 95.82 ) : 01.04.2014

- : 01.04.2014

- : 01.04.2014

- : 01.04.2014

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765 - () : 27.09.2014

400 ()- () : 01.10.2014

400 ()- () : 01.10.2014

30.03.2015

:

400 -, 400 -

-

()-

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230 () 400 ()

230 () 230 ()

400 () ()

400

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-

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13.06.2015

5.2 :

21 2013

,

49.2 Hz 7 2013

49.2Hz, 49.0 Hz, 48.8 Hz 48.6 Hz

,

:

T

h

e

,

5.3 /

/

0.2Hz 49.5Hz 1 2012

-

- ( -) - 49.5 Hz, 0.2 Hz / .

- ( -) - 49.3 Hz, 0.3 Hz / .

I

49.2 Hz

/ .

II

49.0 Hz

/ .

III

48.8 Hz

/ .

IV

48.6 Hz

/ .

1

392 393 398 399 1582

392 393 398 399 1582

2

576 578 586 588 2328

571 578 594 594 2337

3

204 205 208 209 826

214 217 212 211 854

4

740 744 753 756 2993

804 808 867 867 3346

5

417 419 424 426 1686

419 420 426 431 1696

6

21 21 21 22 85

21 22 25 24 92

2350 2360 2390 2400 9500

2421 2438 2522 2526 9907

/

-

49.5 Hz, 0.2 Hz /

(/)

-

49.3 Hz, 0.3 Hz /

(/)

/

1 345 345 855 855 1200 1200

2 474 483 737 735 1211 1218

3 172 178 175 175 347 353

4 624 617 559 561 1183 1178

5 367 368 912 914 1279 1282

6 18 12 0 6 18 18

2000 2003 3238 3246 5238 5249

5.4 :

-

/

5.2()

:

765 800 728

400 420 380

220 245 198

132 145 122

110 121 99

66 72 60

/

765 , 400 220 ,

********

VI

2014-15 :

6.1 / :

6.1.1 26 2014 25 (

24 )

220 - (-)

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:

,

390- 410 395- 415

, ,

- 99.90%

100%

2,300 /

, -

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6.1.2 20 2014 26 (

25 ) :

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2x315 2x500

315

31 2014

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( (100 )

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+/- 100 1x125 1 x 125

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75 2 x 240 , 765/400

*

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* 37 XXIV

:

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,

:

12 2014 25 2014

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5 11

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2014 : 88 ,

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400/220/33

400/220/33

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10

1 2015 ,

.

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400

,

315 500

3X50

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-XXIV

*************

VII

7.1 ,

2014-15 /

)

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)

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)

) 2014-15

()

) 2014-15

) 2015-16

)

************

VIII

8.1 :

31 2015

8.2 :

3735 3094 /

82.8% , ,

'' 55%

3(3) 494

8.3 :

8.4 :

2014-15 2013-14 10

8.5 :

15.09.2014 15.09.2014 30.09.2014

8.6 :

8.7 :

, ,

2013-14 27.03.2015

()

***********

CHAPTER I

SOUTHERN REGIONAL POWER COMMITTEE

INTRODUCTION :

Southern Region comprises the five Southern States namely Andhra Pradesh,

Karnataka, Kerala, Tamil Nadu, Telangana and the Union Territory of Puducherry

encompassing an area of approximately 6,37,000 Square Kilometres, constituting about 20%

of the total area of India.

The Power Map of the Southern Region is given in Exhibit I.

1 MEMBERSHIP, FUNCTIONS AND ORGANISATIONAL SET UP

1.1 MEMBERSHIP OF SRPC :

As per Government of India Resolution dated 25.05.2005 followed by

Amendment Resolutions dated 29.11.2005 and 09.05.2008, the Membership of SRPC

is as follows:

i) Member (Grid Operations), Central Electricity Authority (CEA).

ii) One representative each of Central Generating Companies, Central

Transmission Utility (CTU), National Load Despatch Center (NLDC) and the

Southern Regional Load Despatch Center (SRLDC).

iii) From each of the State in the region, the State Generating Company,

Transmission Utility (STU), State Load Despatch Center (SLDC), one of the

State owned distribution companies as nominated by the State Governments

and one Distribution Company by alphabetical rotation out of the private

distribution companies functioning in the region.

iv) From each of the Union Territories in the region, a representative nominated

by the administration of the Union Territory concerned out of the entities

engaged in generation/transmission/distribution of electricity in the Union

Territory.

v) A representative each of every generating company (Other than Central

Generating Companies or State Government owned generating companies)

having more than 1000 MW installed capacity in the region.

vi) A representative of the generating companies having power plants in the

region (not covered in (ii) to (v) above) by alphabetical rotation.

vii) One member representing the electricity traders in the region by alphabetical

rotation, which has trading volume of more than 500 million units during the

previous financial year.

viii) Member Secretary, SRPC - Convener.

1.2 FUNCTIONS :

The following functions have been assigned to SRPC :

i) To undertake Regional Level Operation Analysis for improving Grid

performance.

ii) To facilitate Inter-State/Inter-Regional transfer of power.

iii) To facilitate all functions of planning relating to Inter-State/Intra-State

Transmission System with CTU/STU.

iv) To coordinate planning of maintenance of generating machines of various

Generating Companies of the region including those of Inter-State Generating

Companies supplying electricity to the Region on annual basis and also to

undertake review of maintenance programme on monthly basis.

v) To undertake planning of outage of transmission system on monthly basis.

vi) To undertake operational Planning Studies including Protection Studies for

stable operation of the Grid.

vii) To undertake planning for maintaining proper voltages through review of

reactive compensation requirement through System Study Committee and

monitoring of installed capacitors.

viii) To evolve consensus on all issues relating to economy and efficiency in the

operation of power system in the region.

1.3 ORGANISATIONAL SET-UP OF SOUTHERN REGIONAL POWER

COMMITTEE SECRETARIAT :

List of Officers in SRPC as on 31.03.2015 is at Annexure - I

The organisational set up of Southern Regional Power Committee Secretariat

detailing the staff allocation during 2014 - 15 is given as follows :

STAFF ALLOCATION

Name of the Post No. of

Posts

Posts filled up

as on

31-03-2015

A. Gazetted :

1. Member Secretary 1 1

2 Superintending Engineer 3 3

3 Assistant Secretary / EE 7 6

4 Asst.Executive Engineer 9 4

5 Assistant Engineer 2 -

6 Assistant Engineer (Civil ) 1 1

7 PS 1 -

B. Non- Gazetted :

1 Technical Officer 1 -

2 Junior Engineer (Civil ) 1 -

3 DMan Gr I 2 1

4 DMan Gr - II 1 -

5 DMan Gr - III 1 -

6 Assistant 1 -

7 Stenographer Gr I 5 3

8 Stenographer Gr II 1 1

9 Hindi Translator 1 1

10 UDC 1 1

11 Store Keeper 1 -

12 LDC 4 1

13 Driver 2 1

14 Peon (MTS) 6 4

15 Chowkidar (MTS) 2 2

16 Mech. Plumber 1 -

17 Helper (MTS) 1 -

TOTAL 56 30

1.4 FINANCIAL PARTICULARS :

The actual expenditure incurred by the SRPC Secretariat during the financial

year 2014-15 is as follows :

SRPC (Non-Plan) : Major Head - 2801 Expenditure : `

Sl Head Head of Account Cumulative Total

upto 31st March

[ Regional Coordination 2801.01.04 ]

1 01.04.01 Salaries 1,37,10,067

2 01.04.03 Over Time Allowance 10,000

3 01.04.06 Medical Expenses 1,48,227

4 01.04.11 Travel Expenses 6,84,169

5 01.04.13 Office Expenses 7,19,870

6 01.04.20 Administrative Expenses 89,322

7 01.04.27 Minor Works 15,68,792

TOTAL 1,69,30,447

Load Despatching Station 2801.01.02 ]

1 01.02.01 Salaries 98,05,440

2 01.02.03 Over Time Allowance 9,900

3 01.02.06 Medical Expenses 37,157

4 01.02.11 Travel Expenses 7,18,484

5 01.02.13 Office Expenses 22,47,598

6 01.02.20 Administrative Expenses 89,385

7 01.02.26 Advertisement & Publicity 7,792

8 01.02.50 Other Charges 4,49,409

TOTAL 1,33,65,165

Minor Works - 2801.02.17.27

Strengthening of RPCs Nil

CHAPTER II

REGIONAL GRID PERFORMANCE

2.1 POWER SUPPLY POSITION :

The Registered Maximum Peak Demand of the Southern Regional Grid

during the year 2014-15 was 38,090 MW indicating an increase of 1105 MW over the

previous year. The Unrestricted Maximum Demand was 40,001 MW. The overall

Demand Shortage in the Region was of the order of 1.13 % to 8.69 % during the year

2014-15. The maximum monthly Demand Shortages were of the order of 0.08 % to

13.80 % in Andhra Pradesh, 3.44 % to 12.00 % in Karnataka, 3.41 % to 8.61 % in

Kerala, 0.14 % to 9.30 % in Tamil Nadu, 2.38 % to 16.46 % in Telangana and 0 % to

11.57 % in Puducherry. The constituent wise details of monthly load pattern viz.

Registered Peak Demand, Unrestricted Demand and Capacity Shortages are given in

Annexure - II.

The Maximum Gross Energy Consumption of Southern Region was 845

MUs/day during the month of March 2015. The Total Gross Energy Consumption of

the Southern Region for the year 2014-15 was 2,80,122 MUs at an average of around

768 MUs/day, which was 6.08% more than that of previous year. The Monthly

Regional Energy Shortages varied from 2.03 % to 8.19 %. The Energy Shortages

were of the order of 0.05 % to 10.58 % in Andhra Pradesh, 2.37 % to 8.13 % in

Karnataka, 0.72 % to 4.22 % in Kerala, 0.28 % to 7.52 % in Tamil Nadu, 2.21 % to

13.83% in Telangana and 0.01 % to 3.26 % in Puducherry. The constituent-wise

details of Monthly Gross Energy Consumption, Unrestricted Energy Requirement,

Energy Shortages and Month-wise Average Energy Consumption/day are given in

Annexure - III.

Load regulations were effected by the States in varying measures. Details of

regulatory measures in force in Southern Region during 2014-15 are given in

Annexure-V.

2.2 SOUTHERN REGION INSTALLED CAPACITY :

The Installed Capacity of Power Plants in Southern Region at the end of

financial year 2014-15 was 65,080 MW (Source : CEA) with a net increase of 11.57

% over that of last year Installed Capacity of 58,329 MW. The total Installed

Capacity comprises Hydro : 11,398 MW (17.51 %), Thermal+Gas+Diesel : 36,245

(55.70 %) Nuclear : 2,320 MW (3.56%) and (Wind + R.E.S) : 15,117 MW (23.23 %).

The Hydro Thermal ratio was 24 : 76 as on 31.03.2015.

The details of Generating Units commissioned during the year 2014-15 are

given in Annexure-XV.

The State-wise Installed Generation Capacity as on 31.03.2015 in the

Southern Region (As reported by CEA) are given in Annexure - VI. The details of

Installed Capacity during the period 2010-11 to 2014-15 in respect of Southern

Region are given in Annexure - VII. The growth of Installed Capacity of Southern

Regional System during the year 2010-11 to 2014-15 is given in Exhibit - II.

2.3 MAXIMUM DEMAND :

Southern Region Maximum Demand recorded during 2014-15 (in the month

of March 2015) was 38,090 MW as compared to 36,985 MW in the previous year

indicating an increase of 1,105 MW. The registered System Peak Demands,

Unrestricted Demand and registered Minimum Demand for each constituent of the

Region during the year 2014 - 15 are given below :

State Registered Peak

Demand

Max.

Unrestricted

Demand

Registered

Minimum Demand

Andhra Pradesh 7100 (17.03.2015) 7391 (Jun-14) 3432 (26.05.2014)

Karnataka 9790 (26.03.2015) 10216 (Apr-14) 3871 (03.06.2014)

Kerala 3602 (26.03.2015) 3777 (Apr-14) 1535 (02.08.2014)

Tamil Nadu 13771 (24.06.2014) 14099 (Mar-15) 5555 (23.10.2014)

Telangana 6914 (28.03.2015) 8064 (Oct-14) 3168 (26.05.2014)

Puducherry 348.2 (29.05.2014) 389 (Jun-14) 118 (16.08.2014)

SR 38090 (27.03.2015) 40001 (Apr-14) 21044 (25.11.2014)

The details of monthly registered Peak Demand of Constituent States of

Southern Region, Unrestricted Demand and the monthly aggregate Peak Demand as

well as monthly Simultaneous Peak Demand of the Region (Gross & Ex-Bus MW)

during the year 2014-15 are furnished at Annexure - II. Also the details of the

monthly registered Minimum Demand of the Constituent States of the Southern

Region and the Demand Shortages are given in Annexure - II. The growth in

Southern Regional States Peak Demand and the SR Peak Demand during the year

2010-11 to 2014-15 are shown in Exhibit - III.

Month-wise diversity factor in respect of Southern region varied from 1.051 to

1.089 during the year 2014-15 and is indicated in Annexure - II.

Annual Load Duration Curve of Southern Region is shown in Exhibit - IV.

Typical load curves for a working day (Regional Peak Demand day) and Regional

Minimum Demand day for the Region and the States are shown in Exhibit - V and

Exhibit - VI respectively.

2.4 ENERGY GENERATION & CONSUMPTION :

The Generation Statistics of Power Stations in the Southern Region during the

year 2014-15 are given at Annexure-VI. Also the Performance Statistics of Power

Stations in the region during the year 2014-15 are given at Annexure - VIII. The

quantum of Hydro, Thermal+Gas+Diesel, Nuclear, State Wind Mill & IPPs Energy

Generation in the Region during 2014-15 was 32,203 MUs (11.36 %), 1,67,313 MUs

(59.01 %), 13,409 MUs (4.73 %), 50 MUs (0.02 %) & 70,573 MUs (24.89 %)

respectively. Break-up of Energy Generation in 2013-14 & 2014-15 are presented as

follows :-

T

h

e

r

e

Type 2013-14

(MU)

2014-15

(MU)

% Increase (+)

% Decrease (-)

Hydro 32,973 32,203 - 02.34 %

Thermal + Gas + Diesel 1,54,194 1,67,313 + 08.51 %

Nuclear 9,760 13,409 + 37.39 %

Wind + Solar (State) 45 50 + 10.61 %

IPPs 61,337 70,573 + 15.06 %

Total 2,58,310 2,83,548 + 09.77 %

was an increase of + 09.77 % in Total Energy Generation in 2014-15 over the

previous year. State-wise Generation and Consumption data for the year 2014-15 is

given in Annexure - X. The growth of generation of the State Systems and Regional

Grid is represented in Exhibit-VII, VIII & IX.

The details of highest ever Energy Consumption met in a day by Constituents

of Southern Region, as on 31st March, 2015 are as follows :

Andhra Pradesh : 160.43 MU on 26.03.2015

Karnataka : 216.59 MU on 26.03.2015

Kerala : 70.99 MU on 26.03.2015

Tamil Nadu : 294.00 MU on 26.06.2014

Telangana : 159.22 MU on 26.03.2015

Puducherry : 7.57 MU on 26.06.2014

Southern Region : 908.06 MU on 26.03.2015

2.5 SYSTEM FREQUENCY :

The monthly average frequency of the Southern Regional Grid varied between

49.92 Hz and 50.00 Hz during the year 2014-15 as against 49.84 Hz and 50.03 Hz

during 2013-14. The Grid was operated within the IEGC range (49.90 Hz to 50.05 Hz

w.e.f. 17.02.2014) for 52.16 % of the time, which is less than that of last year 2013-

14, i.e. 83.67 %.

*

I

E

G

C

F

r

*

*

* IEGC Range of Frequency w.e.f. 17.02.2014 is 49.9 Hz 50.05 Hz

* IEGC Frequency Range prior to 17.02.2014 was 49.7 Hz 50.2 Hz

Details of month-wise frequency profile during the year 2014-15 are given in

Annexure - X.

System Frequency 2012-13 2013-14 2014-15

Below 49.0 Hz 00.01 00.00 00.00

Between 49.0 Hz and 49.5 Hz 02.81 00.10 00.04

Between 49.5 Hz and 49.7 Hz 26.10 03.29 02.10

Between 49.7 Hz and 49.9 Hz 57.68 50.94

26.00

Between 49.9 Hz and 50.0 Hz 34.31

Between 50 Hz and 50.05 Hz 11.43 37.94

17.85

Between 50.05 Hz and 50.2 Hz 18.45

Above 50.2 Hz 01.97 07.73 01.25

Within IEGC Range (49.9 Hz to

50.05 Hz w.e.f. 17.02.2014) 91.07 83.67 52.16

Average Frequency (Hz) 49.80 49.98 49.96

2.6 VOLTAGE PROFILE :

The voltage levels at the major sub-stations as given in Annexure - XXII

were generally satisfactory for most of the time. At few sub-stations, high voltages

prevailed for considerable period of time. The details of Capacitor Installations by

the Constituents during the year 2014-15 are given in Annexure-XXI. However, Low

Voltage conditions were also experienced at a few 400 KV nodes.

2.7 PLANT LOAD FACTORS :

The Average Plant Load Factors of Thermal Power Stations in the Southern

Region as a whole and for the Constituent States for the year 2014-15 as well as for

the previous years 2011-12, 2012-13 & 2013-14 are indicated as follows. Details are

given in Annexure - VIII. The details of outages of Power Stations are given in

Annexure - IX.

Average Plant Load Factors of Thermal Power Stations

Constituent System 2011-12 2012-13 2013-14 2014-15

Andhra Pradesh

83.46 84.16 78.00

67.39

Telangana 80.31

Karnataka 73.20 61.71 69.43 73.02

Kerala 14.12 25.25 10.75 10.11

Tamil Nadu 77.90 77.94 66.87 67.07

Ramagundam STPS 93.07 91.26 86.70 89.76

Talcher St-II 85.00 81.77 82.63 92.53

NLC II 85.87 87.27 86.81 86.44

NLC- TS I Expansion 82.47 90.23 89.48 92.00

Simhadri Stage II 89.79 75.38 81.35 83.28

RGCCP 22.37 49.16 30.74 26.00

Vallur (NTECL) --- 48.78 54.36 43.75

2.8 SYSTEM LOAD FACTORS :

The annual Load Factors of the Southern Region and Constituent Systems

during 2014-15 and the previous years 2010-11, 2011-12, 2012-13 & 2013-14 are

indicated below :

The Load Factor of the Constituent Systems is given in Annexure - IV.

2.9 INTERCONNECTED OPERATION OF THE GRID :

Power Systems of the Constituent States of Southern Region viz, Andhra

Pradesh, Karnataka, Kerala, Tamil Nadu, Telangana and Puducherry operated in

parallel during the year. The details of inter-state & inter-regional lines and the

duration for which major tie lines were open during the year 2014-15 are given in

Annexure - XI. Southern Region has been linked to NEW Grid through 765 kV

Raichur Sholapur PGCIL Line and subsequently RSTCL Line was commissioned

on 30.06.2014.

2.10 OPERATION WITH NEIGHBOURING STATES / REGIONS :

New State Telangana was created on 02.06.2014 by bifurcating Undivided

Andhra Pradesh as Andhra Pradesh and Telangana. Southern region had exchanges of

power with constituents of other Regions, UI Power, Bilateral Exchanges and

Constituent System 2010-11 2011-12 2012-13 2013-14 2014-15

Andhra Pradesh

74 81 80 77

82

Telangana 81

Karnataka 68 72 74 72 72

Kerala 65 66 71 67 70

Tamil Nadu 82 83 78 80 78

Puducherry 77 76 82 80 78

Southern Region 80 84 86 82 84

availing of shares from ER & NR ISG Stations. Southern Region had Energy

Exchanges with all the other regions through the back-to-back HVDC stations at

Chandrapur (via Ramagundam-Chandrapur lines), Gazuwaka (via Jeypore-Gazuwaka

lines), Talcher Interconnecting point and 765 kV Raichur Sholapur Line (PGCIL &

RSTCL). Talcher - Kolar HVDC link is an evacuation scheme for Talcher Stage II

Station dedicated for Southern Region located in Eastern Region.

2.11 ENERGY EXCHANGES :

The constituent wise details of entitlements and schedules from ISGSs in SR

and NTPC stations in ER, including bilateral exchanges and actual drawals from the

grid including losses, for the year 2014-15 are given as follows :

States

Entitlement

from Grid

(MU)

Total

Schedule

from Grid

(MU)

Net Schedule

from Grid

(MU)

Actual

Drawal (MU)

Andhra Pradesh* 12,317 11,991 14,056 14,356

Karnataka 14,444 14,263 8,716 9,144

Kerala 10,754 10,836 12,596 13,600

Tamil Nadu 24,442 24,916 29,961 30,606

Telangana 9,552 9,344 21,071 22,132

Puducherry 2,413 2,340 2,348 2,378

Note : (1) Entitlement, Schedule & Actual Figures are at Generator Periphery. The month

wise details of the same are furnished in Annexure-XII.

* (2) Entitlement, Schedule & Actual Figures in respect of Andhra Pradesh for the

months of April & May, 2014, are inclusive of Telangana.

The actual Inter Regional Energy Exchanges during the year 2014-15 are given below

From To MU

ER SR 7,205

SR ER 33

WR SR 10,465

SR WR 0.077

The month wise details are given in Annexure - XII. The details of inter / intra

regional scheduled bilateral exchanges are given in Annexure - XII, along with ex-

bus schedules of beneficiaries from Inter State Generating Stations.

The details of allocation of shares to the various beneficiaries of Southern

Region from ISG Stations located in Southern Region as on 31st March 2015 are

given in Annexure - XIII.

2.12 RESERVOIR LEVELS :

Salient features viz. Month-wise levels recorded, live storage and inflows in

major hydel reservoirs in the Southern Region during 2014-15 are given in Annexure

- XIV and Exhibit - X.

2.13 PROGRESS OF GENERATION SCHEMES :

The progress of Generation Schemes under construction in the Region as on

31.03.2015 is given in Annexure - XVI.

2.14 PROGRESS OF TRANSMISSION LINES / SUB STATIONS UNDER

CONSTRUCTION :

(a) The details of 765 kV, 400 KV and 220/230 kV Transmission Lines

commissioned during the year 2014-15 are given in Annexure - XIX.

(b) The progress of construction of 765 kV, 400 KV and 220/230 kV

Transmission Lines as on 31.03.2015 are given in Annexure - XX.

(c) The details of 765 KV, 400 KV & 220/230 kV Substations commissioned

during the year 2014-15 are given in Annexure - XVII.

(d) The progress of construction of 765 KV, 400 & 220/230 kV Substations as on

31.03.2015 are given in Annexure - XVIII.

CHAPTER III

GRID PROTECTION

3.1 GRID DISTURBANCES AND PROTECTION RELATED ACTIVITIES :

Categorisation of Grid Incidents and Grid Disturbances :

Central Electricity Authority has issued Grid Standard, which classifies Grid

Incidents as GI-I, GI-2 & Grid Disturbances from GD-1 to GD-5 in the increasing

Order of Severity.

Categorisation of Grid Incidents :

Category GI-1 : Tripping of one or more Power System Elements of the Grid

like a Generator, Transmission Line, Transformer, Shunt

Reactor, Series Capacitor and Static VAR Compensator, which

requires re-scheduling of generation or load, without total loss

of supply at a sub-station or loss of integrity of the Grid at

220 kV;

Category GI-2 : Tripping of one or more Power System Elements of the Grid

like a Generator, Transmission Line, Transformer, Shunt

Reactor, Series Capacitor and Static VAR Compensator, which

requires re-scheduling of generation or load, without total loss

of supply at a sub-station or loss of integrity of the Grid at

400 kV and above;

Categorisation of Grid Disturbances :

Category GD-1 : When less than 10 % of the antecedent generation or load in a

regional grid is lost;

Category GD-2 : When 10 % to less than 20 % of the antecedent generation or

load in a regional grid is lost;





Category GD-5 : When 40 % or more of the antecedent generation or load in a

regional grid is lost.

The details of Grid Disturbances and Grid Incidents, which occurred in the

Southern Region have been enclosed as "Annexure XXV - GD 1" and "Annexure

XXV - GI 1&2" respectively.

3.2 FUNCTIONS OF PCSC :

The functions of the Protection Coordination Sub-Committee in brief are as follows:

a) Analysis of the Grid Disturbances, System Occurrences and other trippings

and to suggest measures to avoid their recurrence.

b) Coordination of settings of protective relays in the Regional System to

maintain the security of the Grid.

c) Periodical review of under frequency load shedding schemes, df/dt load

shedding schemes and other protection schemes adopted in the Grid.

d) Review of the implementation of recommendations made by the Inquiry

Committee of the Grid Disturbances in the region concerning to above

matters.

e) To suggest, discuss and implement Special Protection Schemes to take care of

major loss of import / generation so as to ensure security of the Grid.

The Protection Sub-Committee of SRPC analyzed the Grid Disturbances,

System Occurrences and other trippings that occurred in the Southern Regional Grid

and suggested measures to avoid their reoccurrence.

3.3 ISSUES DELIBERATED IN PCSC :

The Grid Occurrences and Minor Trippings that took place in the constituent

systems were discussed in detail in the Protection Coordination Sub-Committee

(PCSC) meetings. Necessary guidelines / remedial measures, suggested by the

Protection committee were taken up for implementation by the Constituents to avoid

its reoccurrence.

The following issues were deliberated / implemented by the constituents in the

Protection Sub-Committee of SRPC during the year 2014-15 :

a. The following meetings were held to ascertain the status of implementation of

Protection Audit recommendations of Phase I and II to the Honorable CERC:

i. A Special Meeting was held on 19th August 2014. It was informed to

all SR constituents that who had not completed their recommendations

were requested to kindly approach Honble Commission through

petition.

ii. Another Review Meeting was conducted during the 40th meeting of

PCSC.

b. The second circuit of 765kV Sholapur - Raichur line of M/s RSTCL was

commissioned on 30th

June 2014. 765kV Wardha - Aurangabad D/C line has

also been commissioned recently. With these reinforcements, the synchronized

operation of SR entered into the next phase facilitating enhanced interchanges

between NEW-SR grids. The modifications in the related Special Protection

Scheme (SPS), necessitated by this interconnection were discussed.

c. A Meeting was held under the Chairmanship of Secretary, MoP on 11th March

2014 to discuss the report of Task Force on Power System analysis under

Contingency. With reference to the outcome of this meeting, the Members

were urged to initiate action / follow up measures as given in the report. The

Requirements related to Power System Protection include the following:

i. System studies group to be formed for monitoring various

requirements for studies.

ii. Islanding schemes to be reviewed.

iii. Database of relay settings to be created.

d. A Working Group meeting of PCSC was held on 30th

July, 2015 to discuss the

implementation of Task Force on Power System Analysis under

Contingency, Review of Islanding Schemes, and df/dt.

e. On the issue of quantum of df/dt relief to be obtained in the SR, the

Constituents had been requested to implement the following df/dt setting as

recommended by the Working Group of PCSC :

Stage-1 : 49.7 Hz & 0.2 Hz/sec

Stage-2 : 49.5 Hz & 0.3 Hz/sec

However, in view of non-uniformity in the df/dt settings adoption across the

country, TANTRANSCO had requested to continue with the existing df/dt

settings till a final decision on uniform settings is taken. The issue had been

put up to National Power Committee (NPC) and the SR settings would be

reviewed after the decision is taken at NPC level.

f. Islanding Schemes for Southern Region were finalized and implemented with

feeder tripping frequency at 47.9 Hz. Presently, there are four islands in SR as

given below :

1. Hyderabad Islanding Scheme with anticipated load Generation as 2500

MW

2. Chennai Islanding Scheme with anticipated load Generation as 3000 MW

3. Neyveli Islanding Scheme with anticipated load Generation as 3600 MW

4. Koodankulam Islanding Scheme with anticipated load Generation as

2100 MW.

g. M/s PRDC, Bangalore demonstrated their software package, Protection

System Management Suite to the Constituents for handling the relay settings

and database management during 36th

PCSC meeting. In principle approval

was given by constituents for the procurement of software package, through

PSDF, during the 26th

SRPC meeting. The constituents were requested to

provide their written consent and also indicate their requirements to finalize

the modalities of its execution in this regard.

h. KSEBs suggestions / recommendations for providing settings for High Set

Earth Fault Relay on HV side of Generator Transformer (with Star connection

on HV side and Delta connection on LV side) were discussed.

i. With commissioning of new lines in SR, over voltage grading were reviewed

and revised then posted on SRPC website. All Constituents had been directed

to implement the same.

j. As per the directions of MoP / CEA, the Healthiness of Batteries of 220 kV

and above Sub-Stations was reported by the Constituents and the same was

discussed during the PCSC meetings.

k. As per the directions of MoP / CEA, the Detailed Project Report (DPR) in

respect of Renovation and Up-gradation of protection system of all 220 kV

and above substations in the Southern Region are to be prepared and submitted

to NLDC by the concerned Constituents. The following are envisaged to be

included in the DPRs :

Details of the deficiencies observed during Protection Audit

Details of existing protection equipments like Relays, Relay

Panels, Auxiliary Supplies, Measuring Equipments like CT,

CVT / PT etc. and Control Equipments like Circuit Breaker,

Isolators etc. (covered under R&U programme) should also

include Make, Ratings and Year of Manufacturing of the

respective equipment

Details of Spares to be maintained

Details of the Cost Estimates in respect of the above

Timeline / Schedule to complete the rectification of all

deficiencies, detected during the protection audit

l. CEAs Standing Committee (comprising experts from various organizations)

formed to investigate the failure of equipments at 220 kV and above Sub-

Stations, had revised formats for reporting failures of substation equipment

and failure of transmission line towers at 220 kV & above. The Constituents

were apprised of these new formats and requested to send the Equipment

Failure Reports to CEA as per these new formats.

m. As per the directions of MOP / CEA, the remedial measures taken for the

critical tripping events in the Southern Region were compiled and sent to CEA

on daily basis.

3.4 ORDERS ISSUED BY HONBLE CERC IN CONNECTION WITH

PROTECTION :

I. Petition No. 146/MP/2013 with I.A. 36/2013: Order dated 20.02.2014 :

a. Compliance of Regulations 5.2 (r) of the Grid Code : Issue regarding

non-furnishing of FIR / Trip Analysis Report, EL, DR, etc. was also

highlighted. It was pointed out that the above reports are to be

submitted / uploaded on SRLDC web application within 24 hours as

mandated under IEGC / CEA Regulations.

b. Implementation of Phase-I and Phase-II of Protection Audit

Recommendations : All the constituents are requested to submit the

updated status of the compliance (those who have not completed

recommendations mentioned in the Phase I and Phase II) to SRPC

Secretariat at the earliest.

c. Compliance of Regulations 5.2 (e) & 5.2 (l) of the Grid Code and

Regulation 3(1)(e) of CEA Grid Standards : The constituents were

requested to strictly comply with these provisions by ensuring standard

protections systems having the reliability, selectivity, speed and

sensitivity to isolate the faulty equipment and protect all components

from any type of faults, within the specified fault clearance time and

providing protection coordination.

d. Ensuring proper maintenance of transmission lines and adopting

best O&M practices : The constituents were requested to conduct line

patrolling regularly as per the SRPC transmission line patrolling

guidelines (available under the menu item "All Uploads Operation

Miscellaneous Transmission Line Patrolling Protocol /

Guidelines for Southern Region" on SRPC website).

(http://www.srpc.kar.nic.in/website/2014/operation/patrolling.pdf).

http://www.srpc.kar.nic.in/website/2014/operation/patrolling.pdf

II. Petition No. 167/Suo- Motu/2012: Order dated 22.02.2014 :

a. The Constituents were requested to follow approved protection

philosophy

b. ISTS licensees were requested to submit details of updated distance

protection relay setting of all inter-regional lines to POSOCO & RPCs.

c. All SLDCs were requested to install/activate sound recording system in their

control rooms within three months from the date of issue of this order.

d. The Constituents were requested to submit the progress of

implementation to SRPC and SRLDC as specified in the Hon'ble

CERC Order.

III. Review of Petition No. 263/MP/2012, Order dated 19.12.2013, Date of

Hearing 27.05.2014 & Date of Order 24.12.2014 :

a. Constituents were requested to implement the quantum of relief by

AUFR and df/dt relays by identifying additional feeders and keep them

functional within one month of issuing this order.

b. SLDCs were also requested to map these relays on their respective

SCADA system within three months of issuance of this order.

c. The Constituents were requested to submit the progress of

implementation to SRPC and SRLDC as specified in the Hon'ble

CERC Order.

IV. Petition No. 374/MP/2014, Date of Hearing 15.01.2015 :

a. All Southern Region Constituents had been directed to file the status of

implementation of protection system in their respective system to

Honble CERC by 31.03.2015.

3.5 ISLANDING SCHEMES IN THE SOUTHERN REGION :

a. Islanding is a defense mechanism of splitting the larger power system in

distress into smaller systems with relatively balanced load / generation in each

of the split systems when power system may occasionally land in a situation of

acute load / generation unbalance when its frequency nose dives. This may

happen in un-intended system splitting or even by sudden loss of large source.

Such events would be characterized by high rate of decline of frequency,

compounded by the tripping out of generating units on under-frequency or on

process protection when the frequency falls to such low values when auxiliary

services fail to meet the plant process requirements. The approved Islanding

Schemes in Southern Region are non-adaptive in nature; Islands are formed

with anticipated Load Generation balance and with tripping of pre-decided

feeders at 47.9Hz. They are :

(i). Hyderabad Islanding Scheme :

Anticipated Load Generation = 2500 MW

Generators Participating :

1. Ramagundam NTPC = 2600 MW

i. Stage I = 3 X 200 MW

ii. Stage II = 3 X 500 MW

iii. Stage III = 1 X 500 MW

2. KTPP Bhoopalapally TSGENCO: 1 X 500 MW = 500

MW

(ii). Chennai Islanding Scheme :



1. Ennore TPS = 100 MW

2. North Chennai TPS Stage -1 = 630 MW

3. NTECL Vallur = 1500 MW

4. GMR = 80 MW

5. MAPS = 440 MW

6. North Chennai TPS Stage II = 1200 MW

(iii). Neyveli Islanding Scheme :



1. Neyveli TS1 = 475 MW

2. Neyveli TS2 = 1470 MW

3. Neyveli TS1 Expn = 420 MW

4. STCMS = 250 MW

5. MTPS = 1040 MW

6. Hydro Stations = 500 MW

7. Gas Power Stations = 500 MW

8. SPCL = 100 MW

(iv). Koodankulam Islanding Scheme :



1. Tuticorin TPS = 1050 MW

2. KKNPP Unit - 1 = 1000 MW

3. Hydro Stations = 200 MW

4. Gas Power Stations = 160 MW

5. IPP & CPP = 800 MW

6. RGCCP = 270 MW

7. Sabarigiri = 150 MW

b. PCSC reviewed and recommended for Single Phase Auto Reclosing Scheme

for all the 220 kV and above lines.

c. PCSC reviewed and recommended for Single Phase Auto Reclosing Scheme

for all the 220 kV and above lines.

d. There were 13 PMUs installed in the Southern Region, out of which, 6 PMUs

were under SRLDC Pilot Project and 4 PMUs were NRLDC Pilot Project.

PMU's under SRLDC Pilot PMU Project were installed at the following

Locations :

1) Ramagundam Generating Station 400 kV Bus (NTPC)

2) Vijayawada Sub- Station 400 kV Bus (POWER GRID) 3) Sriperumbudur (Chennai) Sub- Station 400 kV Bus (POWER

GRID)

4) Somanahalli (Bangalore) Sub- Station 400 kV Bus (POWER GRID)

5) Thrissur Sub- Station 400 kV Bus (POWER GRID)

6) Narendra Sub Station 400 kV Bus (Through VSAT of KPTCL)

(POWER GRID)

PMU's were installed under NRLDC Pilot PMU Project, at the following

Locations :

1) Kolar Sub- Station 400 kV Bus (POWER GRID) 2) Gooty Sub- Station 400 kV Bus (POWER GRID) 3) Gazuwaka Sub- Station 400 kV South Bus (POWER GRID) 4) Thirunelveli Sub- Station 400 kV Bus (POWER GRID)

The remaining 3 PMUs were installed at the following locations by the

manufacturers themselves :

1) Gajuwaka 400 kV Sub- Station East bus (ABB)

2) 765 kV Raichur Sub- Station (Alstom)

3) 400 kV RTPS Sub- Station (ABB)

3.6 NEW SPECIAL PROTECTION SCHEMES (SPS) IN THE SOUTHERN

REGION :

The following new SPS have been suggested by PCSC for the implementation

in Southern Region :

(A). Kudankulam SPS : An SPS was suggested by PCSC to Kudankulam for

relieving stress on Lines. In case of tripping one or two units at Kudankulam

Nuclear Power Plant, Trip signal-1 or Trip signal-1&2 will be generated

depending on number of Tripping Units. Trip signal - I for 848 MW has been

implemented and Trip Signal II for 848 MW has been identified and

expected to be implemented while commissioning 2nd

Unit of KKNPP,

Kudankulam.

(B). SPS for WR SR Contingencies :

(a) SPS 1 for contingencies of 765 kV Raichur Sholapur Lines :

Triggering Criteria for SPS :

(i) With Both circuit of 765kV Sholapur - Raichur in operation :

a. SPS at Sholapur and Raichur should trigger when total flow on

765 kV Sholapur - Raichur 2 x S/C Lines crosses 1500 MW

from Sholapur to Raichur and remains above 1500 MW for 2.5

Sec.

b. It should also act instantaneously when the total power flow

crosses 2000 MW.

(ii) With One circuit of 765 kV Sholapur - Raichur in operation :

a. SPS at Sholapur and Raichur should trigger when total flow on

765 kV Sholapur -Raichur S/C line crosses 1000 MW from

Sholapur to Raichur and remains above 1000 MW for 2.5 Sec.

b. It should also act instantaneously when the total power flow

crosses 1500 MW.

Action :

SPS to activate load shedding in SR and generation back down in W.R

for 500 MW viz JPL 350 MW and KSK 150 MW.

Present SPS Loads in Southern Region :

Tamilnadu - 146 MW

Karnataka - 109 MW

Andhrapradesh - 125 MW

Kerala - 125 MW

The trip signal-3 is used for load shedding in S.R

(b) SPS 2 for contingencies of 765 kV Raichur Sholapur Lines :


Rate of change of Power Flow exceeding 400 MW/sec in the Sholapur

to Raichur direction

Action :

SPS to activate load shedding in SR.


Tamilnadu - 146 MW

Karnataka - 109 MW


Kerala - 125 MW


(c) SPS 3 for contingencies of 765 kV Raichur Sholapur Lines :


Loss of Import on both the circuits of 765 kV Sholapur - Raichur by

more than 800 MW due to tripping of these lines i.e., tripping of two

765kV lines.

Action :

SPS to activate load shedding in SR.


Tamilnadu - 146 MW

Karnataka - 109 MW


Kerala - 125 MW


(d) SPS 4 for contingencies of 765 kV Raichur Sholapur Lines :


765kV Sholapur - Raichur Line Current exceeding 800 A (1000 MW

from Sholapur to Raichur direction)

Action :

(i) With Both circuit of 765 kV Sholapur - Raichur in operation :

SPS action to be blocked.

(ii) With One circuit of 765 kV Sholapur - Raichur in operation :

Tripping of 765 kV Sholapur - Raichur Line with 10 sec delay.


No Load Shedding in S.R

(e). SPS for Contingency of 400 kV Raipur Wardha Lines :


Flow on 400 kV Raipur - Wardha of any circuit exceeding 850 MW

and remaining above this value for 2.5 Sec

Or

Tripping of any circuit when the antecedent flow is greater than 700

MW

Action :

SPS to activate load shedding in SR and generation back down in W.R

for 800 MW viz JPL 600 MW and KSK 200 MW.


Tamilnadu - 290 MW

Karnataka - 195 MW


Kerala - 135 MW

The trip signal for load shedding in S.R will trigger tripping of load

group which is used for SPS for Kudankulam Unit-1 (Trip signal-4)

(f). SPS for Contingency of 400 kV Wardha Parli Lines :


Flow on 400 kV Wardha Parli of any circuit exceeding 850 MW and

remaining above this value for 2.5 Sec

Or

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