SOUTHERN REGIONAL LOAD DESPATCH CENTRE

1SOUTHERN REGIONAL LOAD DESPATCH CENTRE

POWER GRID CORPORATION OF INDIA LIMITED

Presentation to the Engineers of KPCL

on

4th August, 2005

2

PRESENTATION OVERVIEW

REGIONAL GRIDS – QUICK FACTS

SOUTHERN REGIONAL GRID – OVERVIEW

GRID OPERATION – TYPICAL ISSUES IN PAST

PRESENT GRID STATUS – CARDINAL EVENTS

ABT IMPLEMENTATION – KARNATAKA SYSTEM

ABT – UI POOL IN SR GRID

3

THANK YOU

4

REGIONAL GRIDS

QUICK FACTS

5

SOUTHERN REGION

WESTERNREGION

EASTERN REGION

NORTHERN REGION

NORTH-EASTERN REGION

INSTALLED CAPACITY

NORTHERN :- 31,230 MW

EASTERN :- 17,697 MW

SOUTHERN :- 32,704 MW

WESTERN :- 32,354 MW

NORTH-EASTERN :- 2,357 MW

TOTAL 116,142 MW

REGIONAL GRIDS

6

SOUTHERN REGION

WESTERNREGION

EASTERN REGION

NORTHERN REGION


‘ ELECTRICAL’

REGIONS1

2

3

SAME FREQUENCY FROM GUJARAT TO ARUNACHAL PRADESH WITH EFFECT FROM MARCH 2003

ABOUT 2800 KMS! APART

7

SOUTHERN REGION

WESTERNREGION

EASTERN REGION

NORTHERN REGION


‘ELECTRICAL’

REGIONS

1

2

WITH THE COMMISSIONING OF THE TALA PROJECT CONNECTING THE EASTERN AND NORTHERN GRIDS, INDIA WILL HAVE ONLY TWO GRIDS

8

Growth of Installed Growth of Installed Capacity for Electricity in Capacity for Electricity in

IndiaIndia

0

20000

40000

60000

80000

100000

120000

1990

-91

1991

-92

1992

-93

1993

-94

1994

-95

1995

-96

1996

-97

1997

-98

1998

-99

1999

-00

2000

-01

2001

-02

2002

-03

2003

-04

in MW

Inter Regional Links

700 MW700 MW

1200MW1200MW

2000MW2000MW

1200 MW1200 MW

900 MW900 MW30,500 MW

16,000

32,700 MW

30,500 MW

2300

1850 MW1850 MW

1650 MW1650 MW

Present IR Present IR Capacity = Capacity = 9,500 MW9,500 MW

10

Sourcewise Sourcewise composition of composition of

installed capacity in installed capacity in IndiaIndia

((1,16,142 in 2005)1,16,142 in 2005)2.40% 1.70% 26%

70%

HydroThermalNuclearWind

11

SOUTHERN REGIONAL GRID

OVERVIEW

12

SOUTHERN REGION – GEOGRAPHY

ANDHRA PRADESH

TAMIL NADU

KARNATAKA

KE

RA

LA

POPULATION :- 22.5 CRORES ( 22% OF INDIA)

AREA :- 651 (‘000 SQ KM)(19% OF INDIA)

INSTALLED CAPACITY:- 31,931 MW(27.6%)

WEATHER :- South-west monsoon

North-east monsoon

SEA COAST :- AROUND 4000 KM

13

SR STATES – POWER SYSTEM STATISTICSANDHRA PRADESH

INSTALLED CAPACITY – 9486 MW

MAX DEMAND MET – 7547 MW

DAILY CONSUMPTION MAX – 166 MU

DAILY CONSUMPTION AVG – 142 MU

CONSUMER PROFILE –

INDS -27%, DOM-22%, COMM-5%, IRRI-39% & OTHERS-7%

KARNATAKA







KERALA






INDS -34%, DOM-44%, COMM-13%, IRRI-2%& OTHERS-7%

TAMIL NADU







14

ANDHRA PRADESH

POPULATION :- 7.6 CRORES

AREA :- 275 (‘000 SQ KM)

NO OF CONSUMERS :- 162 LAKHS

PER CAPITA CONS. :- 719 UNITS

MAIN AGRICULTURE CROP :- RICE

CLIMATIC CONDITION :- HOT AND HOT & HUMID

SR STATES – GEOGRAPHYKARNATAKA


AREA :- 192 (‘000 SQ KM)



MAIN AGRICULTURE CROP :- COFFEE & RAGI


KERALA


AREA :- 39 (‘000 SQ KM)



MAIN AGRICULTURE CROP :- COCONUT & SPICES

CLIMATIC CONDITION :- HUMID

TAMIL NADU


AREA :- 130 (‘000 SQ KM)



MAIN AGRICULTURE CROP :- SUGAR CANE & OIL SEEDS


15

GROWTH OF INSTALLED CAPACITY OF SR

1947

5

1983

0

2030

4

2129

8

2213

3

2298

3

2417

3 2616

3 2850

1

2952

6

10000

12000

14000

16000

18000

20000

22000

24000

26000

28000

30000

1994-95 1995-96 1996-97 1997-98 1998-99 1999-00 2000-01 2001-02 2002-03 2003-04

YEARS --->

IN MW

16

INSTALLED CAPACITY IN SR

The above capacity does not includes

--- About 1344 MW of Wind Mill Capacity in Tamil Nadu.

--- Micro and Captive plants in different states.

AGENCY HYDRO THERMALGAS/

DIESELWIND/

OTHERS NUCLEAR TOTAL

AP 3586 2963 272 2 --- 6823

KAR 3277 1470 128 5 --- 4879

KER 1811 --- 235 2 --- 2047

TN 1987 2970 423 19 --- 5400

PONDI --- --- 33 --- --- 33

C. S. --- 8090 360 --- 830 9280

IPP 278 387 2506 1071 --- 4243

TOTAL10939 (33%)

15880 (49%)

3956 (12%) 1099 (3%) 830 (3%) 32704

17

SOURCE-WISE EFFECTIVE GENERATING CAPACITY OF SOUTHERN REGION

AS ON 31-MAR-05

HY DRO

33%

THERMAL

49%

GAS/NAPTHA/DIESEL

12%

NUCLEAR

3%

WIND

3%

SOURCE IN MW IN %HYDRO 10939 33

THERMAL 15910 49GAS/NAPTHA/DIESEL 3956 12

NUCLEAR 830 3WIND 1099 3TOTAL 32734 100

GENERATING UNITS IN SOUTHERN REGION

A.PKAR

TNKERGENERATORS ABOVE 1000 MW

GENERATORS 500 – 1000 MW

GENERATORS BELOW 500 MW

TYPICAL

GENERATOR

SPREAD

IN SR

UNIT CAPACITY AP KAR KER TN CGS TOTAL

THERMAL (500 MW) 2 8 10

THERMAL

(200-250 MW)10 7 13 15 45

GAS/THERMAL

(100-150 MW)9 2 3 10 24

HYDRO

(>50 MW)27 28 16 15 85

TOTAL 48 36 19 38 163

- HYDRO

- THERMAL

- GAS / NAPTHA

- NUCLEAR

19

LOAD 500-1500 MW

LOAD 200-500 MW

TYPICAL

LOAD

SPREAD

IN SR

KHAMMAM

VIJAYAWADANAGARJUNASAGAR

GAZUWAKA

HYDERABAD

RAICHUR

GOOTY

HOODY

SALEM

UDUMALPET

TRICHUR

MADURAI

TRICHY

MADRAS

NEYVELI

CUDDAPAH

DAVANAGERE

RAMAGUNDAM

BANGALORE

MUNIRABAD

PP

P

P

P

P

P

P

P

P

P

PP

P

P

KOLAR

63

HOSUR

1

60

P

NELLORE

NELAMANGALA

KURNOOL

KALPAKKA

SIMHADRI

HIRIYUR

TALAGUPPA

MAMIDIPALLY

SRI SAILAM

-- OF NTPC

-- OF ANDHRA PRADESH

-- OF KARNATAKA

-- OF NLC

-- OF POWERGRID

400KV SUB-STATIONS IN SR

NEYVELI TPS I (EXP)

POWERGRID STATE OTHERS TOTAL

AP 8 4 2 14

KAR 4 5 9

KER 2 2

TN 6 2 8

TOTAL 19 9 4 33

TRIVENDRUM

21

TRANSMISSION IN SOUTHERN INDIA

ABOUT 2800 CKM OF 400 KV LINES ADDED IN THE PAST 2 YEARS

VOLTAGE LEVEL AP KAR KER TN CGS TOTAL

400 KV 2042 1614 9850 13506

220/230 KV 10050 7590 2650 6270 366 26926

132/110 KV 12360 6060 3720 10220 32360

TOTAL 24452 15264 6370 16490 10216 71404

KHAMMAM

VIJAYAWADANAGARJUNASAGAR

VISAKHAPATNAM

(POWERGRID)HYDERABAD

RAICHUR

GOOTY

HOODY

SALEM

UDUMALPET

TRICHUR

MADURAI

TRICHY

MADRAS

NEYVELI

CUDDAPAHDAVANAGERE

KAIGA

115

317

RSTPP

BHADRAVATI

130x216

4x2

182

151

181

173

302

308172

277

279

155

178x

2

PONDICHERY

BANGALORE

SIRSI

MUNIRABAD

PP

P

P

P

P

P

P

P

P

P

PP

P

P

N

KOLAR

PALLOM

KAYANKULAMEDAMON

TALCHER

JEYPORE

63

187

2x78

2x221

54

HOSUR

KADRA

KODASAALY

Nagjhari

1

120

60

MAPS

P

SSLMM

MMDP

THIRUVANATHAPURAM

ALMATHI

NELLORE

400 KV LINE PRESENTLY

OPERATED AT 220 KV

NELAMANGALA

KURNOOL

GAZUWAKA(AP)

SIMHADRI NTPC

HIRIYUR

189

195

267x

2

258

242

175

179

127

130x

2

221x2

146x252x2

197x2

301x2

8x4

15x2

300

28

330

ABOUT 12000 CKM 400KV TRANSMISSION

TALGUPPA

GRID MAP

GRID FOCAL POINT SHIFTED TO KOLAR AFTER COMMISSIONING OF HVDC

KOODANKULAM

THIRNELVALI

TYPICAL FLOWS ARE FROM NORTH TO SOUTH

QUANTUM CHANGES IN FLOW PATTERN LIKELY AFTER COMMISSIONING OF KOODANKULAM 2000 MW

23

13000

14000

15000

16000

17000

18000

19000

20000

21000

22000

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

TIME IN HRS --->

DE

MA

ND

IN

MW

---

>

MONSOON SUMMER WINTER

TYPICAL LOAD CURVE OF SR

WINTER

MONSOON

SUMMER

EVENING PEAK

WEATHER

RESERVOIR CONSUMPTION

24

GRID OPERATION

TYPICAL ISSUES IN THE PAST

25

GRID OPERATION – TYPICAL ISSUES IN PAST

• LOW / HIGH FREQUENCY PROBLEMS

– FREQUENCY EXCURSES TO LOW/HIGH VALUES

• LOW / HIGH VOLTAGE OPERATION

– CRITICALLY LOW VOLTAGES AT LOAD CENTRES

– SUBSTANTIALLY HIGH VOLTAGES AT FAR ENDS

• SYSTEM BROWNOUTS / BLACK OUTS

– SEPERATION OF SYSTEMS / LOSS OF LOAD

• ECONOMIC IN-STABILITY / INCREASED ELECTRICAL LOSSES– UNRELIABLE / INEFFICIENT OPERATION OF EQUIPMENT

26

GRID PRESENT STATUS

27

GRID OPERATION – PRESENT STATUS

STABILISED SYSTEM FREQUENCY

IMPROVED VOLTAGES

MERIT ORDER OPERATION

INTER REGIONAL EXCHANGES

IMPROVED GRID SECURITY

JAN - 02 JAN - 03 Vol

28

GRID PRESENT STATUS

CARDINAL EVENTS

29

GRID PRESENT STATUS -- CARDINAL EVENTS

• AVAILABILITY BASED TARIFF

• UNIFIED LOAD DESPATCH SCHEME

• GENERATION ADDITION

• INTERREGIONAL AC / HVDC LINKS

• OPERATIONAL EXCELLANCE

30

MONSOONS

SOUTH WEST MONSOON NORTH EAST

MONSOON

31

GRID OPERATION:GRID OPERATION: A TIGHT ROPE WALK A TIGHT ROPE WALK

BLACK-OUTVOLTAGE

COLLAPSE IN-ECONOMIC

OPERATION

INSTABILITYPOWER

SWINGSINCREASED

LOSSES

32

STABILISED SYSTEM FREQUENCY

• TYPICAL FREQUENCY CURVE

• SCATTER DIAGRAM

• HISTOGRAM OF FREQUENCY

• FREQUENCY DURATION CURVE

• Df/dT CURVE

• RECORD FVI OF 0.04

33

47.50

48.00

48.50

49.00

49.50

50.00

50.50

51.00

25 26 27 28 29 30 31

DAYS ----->

FR

EQ

UE

NC

Y IN

HZ

---

->FREQUENCY PROFILE

2002, 2003 & 2004

34

FREQUENCY DURATION CURVE AUG TO OCT 04, 03 & 02

47.50

48.00

48.50

49.00

49.50

50.00

50.50

51.00

1 1117 2233 3349 4465 5581 6697 7813 8929 10045 11161 12277 13393 14509 15625 16741 17857 18973 20089 21205

% OF TIME --->

FR

EQ

UE

NC

Y IN

HZ

---

>

0 10 20 30 40 50 60 70 80 90 100

2004

2003

<49.049.0 & <49.5

49.5 & <50.5

50.5 & Above

Max Min Avg FVI St. Dev

2004 0.03 1.46 98.28 0.23 50.82 48.62 49.95 0.31 0.12

2003 0.17 8.32 90.66 0.85 50.85 48.60 49.81 0.95 0.18

2002 73.62 12.45 12.84 1.09 51.08 47.69 48.63 23.59 0.44

2002

35

Voltage at Bangalore Jan 02 & 03

36

VARIABLE COST(Ps) OF POWER STATION IN SR AS ON JUNE 2004

0

2000

4000

6000

8000

10000

12000

14000

16000

18000P

ON

DY

PC

L (3

2.5

MW

)(19

.61

PS

)

NE

YV

ELI

-II S

TG

1 *

*(63

0 M

W)(

67.9

9 P

S)

KO

VIL

KA

LAP

PA

L *(

105

MW

)(68

PS

)

JEG

UR

UP

AD

U (

GA

S)(

216

MW

)(82

PS

)

SP

EC

TR

UM

(G

AS

)(20

8 M

W)(

83 P

S)

VIJ

JES

WA

RA

M -

I(10

0 M

W)(

84 P

S)

VIJ

JES

WA

RA

M -

II(17

2.5

MW

)(86

PS

)

B S

E S

(A

P)(

GA

S)(

140

MW

)(87

PS

)

RE

INS

CA

LCIN

ING

LT

D.(

41 M

W)(

90 P

S)

RA

MA

GU

ND

AM

(210

0 M

W)(

90 P

S)

LAN

CO

(350

MW

)(91

.48

PS

)

NE

YV

ELI

-II S

TG

-II *

*(84

0 M

W)(

94.6

1 P

S)

SIM

HA

DR

I(10

00 M

W)(

96 P

S)

RA

MA

GU

ND

AM

-B(6

2.5

MW

)(96

PS

)

VIJ

AY

AW

AD

A T

.P.S

.-1&

2(10

50 M

W)(

101

PS

)

VIJ

AY

AW

AD

A T

.P.S

.-3(

210

MW

)(10

1 P

S)

KO

TH

AG

UD

EM

(B)(

210

MW

)(10

8 P

S)

RA

ICH

UR

.T.P

S. *

*(12

60 M

W)(

110

PS

)

KO

TH

AG

UD

EM

(A)(

240

MW

)(11

0 P

S)

KO

TH

AG

UD

EM

(C)(

220

MW

)(12

3.1

PS

)

KO

TH

AG

UD

EM

(D)(

500

MW

)(12

4 P

S)

RA

YA

LAS

EE

MA

TP

P(4

20 M

W)(

126

PS

)

NO

RT

H M

AD

RA

S.T

.P.S

(630

MW

)(13

0.98

PS

)

TU

TU

CO

RIN

.T.P

.S(1

050

MW

)(13

3.5

PS

)

ME

TT

UR

.T.P

.S(8

40 M

W)(

150

PS

)

V S

P *

(120

MW

)(16

9.11

PS

)

ST

-CM

S(2

50 M

W)(

171

PS

)

NE

YV

ELI

-I(6

00 M

W)(

185.

86 P

S)

EN

NO

RE

.T.P

.S(4

50 M

W)(

190.

2 P

S)

L V

S(3

7.8

MW

)(20

0 P

S)

YE

LEH

AN

KA

DE

ISE

L(12

7.92

MW

)(20

3.36

PS

)

NA

VB

HA

RA

T(3

5 M

W)(

205

PS

)

BR

AH

MA

PU

AM

D P

P(1

06.5

MW

)(21

4 P

S)

NE

LLO

RE

(30

MW

)(22

5 P

S)

B S

E S

(K

ER

ALA

)(16

5.5

MW

)(22

5 P

S)

TH

AN

NE

ER

BA

VI(

235

MW

)(22

8 P

S)

JIN

DA

L(26

0 M

W)(

247

PS

)

BA

LAJI

(SA

MA

YA

NA

LLU

R)(

105

MW

)(24

7 P

S)

KO

ZH

IKO

DE

DP

P(1

28.8

MW

)(25

0 P

S)

GM

R V

AS

AV

I(19

6 M

W)(

254

PS

)

SA

MA

LPA

TT

Y IP

P(1

05 M

W)(

263

PS

)

TA

TA

DE

ISE

L(81

.3 M

W)(

280

PS

)

KA

YA

MK

ULA

M N

TP

C(3

50 M

W)(

290

PS

)

KA

SA

RG

OD

P C

L(2

1 M

W)(

300

PS

)

RA

YA

LAS

EE

MA

(37.

8 M

W)(

330

PS

)

PP

NA

LLU

R(3

30.5

MW

)(41

5 P

S)

BA

SIN

BR

IDG

E(1

20 M

W)(

468

PS

)

CU

MU

LA

TIV

E IN

ST

AL

LE

D C

AP

AC

ITY

IN M

W

0

50

100

150

200

250

300

350

400

450

VA

RIA

BL

E C

OS

T IN

Ps/

UN

IT

VARIABLE COST

CUMULATIVEINSTALLE

ABOUT 7000 MW OF CAPACITY IS BELOW 100 Ps

ABOUT14200 MW OF CAPACITY IS BELOW 200 Ps

ABOUT 16000 MW OF CAPACITY IS BELOW 300 Ps

CUM. INS. CAP.

37

49.72 HZ

38

MERIT ORDER : UNITS BOXED UP

POWER STATION STATE CAPACITY(MW) FUELVARIABLE

COST

TATA DIESELKARNATAK

A 79 DIESEL 308

RAYALSEEMA DGPP

KARNATAKA 27 DIESEL 360

YELEHANKA DIESEL

KARNATAKA 128 DIESEL 314

THANRBHAVIKARNATAK

A 220 NAPTHA 325

SUB-TOTAL 454

BRAHAMPURAM DPP KERALA 107 DIESEL 275

BSES KERALA 157 NAPTHA 308

KASARGODE PCL KERALA 22 NAPTHA 298

KAYAMKULAM KERALA 360 NAPTHA 322

SUB-TOTAL 646

BASIN BRIDGETAMIL NADU 120 NAPTHA 584

P.P.NALLURTAMIL NADU 330 NAPTHA 415

SUB-TOTAL 450

TOTAL 1550

39

DEEP VALLEY

DEEP VALLEY

SHARP

PEAK

40

KADAMPARAI PUMP OPERATION

-300

-200

-100

0

100

200

300

400

5000:

001:

002:

003:

004:

005:

006:

007:

008:

009:

0010

:00

11:0

012

:00

13:0

014

:00

15:0

016

:00

17:0

018

:00

19:0

020

:00

21:0

022

:00

23:0

00:

00

TIME ---->

IN M

W --

-->

48.50

49.00

49.50

50.00

50.50

51.00

FREQ

UENC

Y IN

HZ

---->

GENERATOR MODE

PUMP PUMP

SAVINGS OF RS 40 LAKHS EVERY DAY

INVESTMENT OF 1600 CRORES SAVED

41

OPPORTUNISTIC UI TRADEEXPORT TO WR ON 13/05/03-14/05/03

-300

-200

-100

0

100

200

300

400

500

600

00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08

49

49.2

49.4

49.6

49.8

50

50.2

50.4

50.6

50.8

51POWER EXPORT TO WR ON

UI BASIS DURING LOAD CRASH

FREQ

42

SCHEDULE VS ACTUAL INJECTION GRAPH OF ER (AT ER PERIPHERY) FOR DATE : 31.08.03

0

100

200

300

400

500

600

700

800

900

0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 88 92

TIME AS BLOCK OF 15 MINUTE --->

MW

-->

49.0

49.5

50.0

50.5

51.0

51.5

52.0

52.5

53.0

53.5

54.0

54.5

55.0

FREQ

UEN

CY

(Hz)

-->

SCHEDULE ACTUAL INJECTION ENTITLEMENT

SR FREQ ER FREQ

Entitlement

Schedule

Actual Injection

OPERATION ON 31/08/03 (Ganesh Chathurthi)

AMOUNT SAVED FOR SR CONSTITUENTS = 107 LAKHS

50 NOS HVDC SETPOINT CHANGES DONE TO ACHIEVE THIS!!!!!

43

GENERATION vs FREQUENCY FOR

10

30

50

70

90

08

:21

09

:21

10

:21

11

:21

TIME IN HH:MM ----->

MW

---

-->

49.00

49.20

49.40

49.60

49.80

50.00

50.20

50.40

FR

EQ

IN

HZ

---

-->

FREE GOVERNOR MODE OF OPERATION ON 12-DEC-04

SHARAVATHI -1

FREQ DROP FROM 49.72 HZ TO 49.27 HZ

i.e. ~ 0.45HZ

44

GENERATION vs FREQUENCY FOR

10

30

50

70

90

08

:21

09

:21

10

:21

11

:21

TIME IN HH:MM ----->

MW

---

-->

49.00

49.20

49.40

49.60

49.80

50.00

50.20

50.40

FR

EQ

IN

HZ

---

-->

FREE GOVERNOR MODE OF OPERATION ON 12-DEC-04

SHARAVATHI -4

FREQ DROP FROM 49.72 HZ TO 49.27 HZ

i.e. ~ 0.45HZ

45

0

100

200

300

400

500

600

700

800

900

1000

0 2 4 6 8 10 12 14 16 18 20 22 0

HOURS ---->

GE

NE

RA

TIO

N IN

MW

---

>

48.80

49.00

49.20

49.40

49.60

49.80

50.00

50.20

50.40

FR

EQ

IN H

Z--

->

SHARAVATHI GENERATION – TYPICAL DAY

FREQ

MW

46

OPTIMAL RESERVOIR UTILISATIONSHARAVATHY IN KARNATAKA

THE COST OF GENERATION AT SHARAVATHY IS LESS THAN 20 Ps /UNIT

AVERAGE SELLING UI RATE OF KARNATAKA IS 372 Ps/UNIT

PLANT OPERATORS AT SHARAVATHY THINK OF THE RESERVOIR LEVEL IN RUPEES

RATHER THAN IN FEET!!!

Rs. Rs.

Rs.

Rs.

Rs.

Rs.Rs.

Rs.

Rs.

Rs.

Rs.

Rs.

Rs.

Rs.

Rs.Rs.

47

Growth Of Inter Regional Energy Exchanges

73508230

9730

13000

22500

0

5000

10000

15000

20000

25000

1999-2000 2000-2001 2001-2002 2002-2003 2003-2004

Year

To

tal M

U D

uri

ng

Th

e Y

ear

IR Energy Exchanges

48

MAJOR AND MINOR DISTURBANCES SINCE 1994

0

1

2

3

4

5

6

7

8

9

10N

UM

BE

R O

F D

IST

UR

BA

NC

ES

---

----

->

1994

-95

1995

-96

1996

-97

1997

-98

1998

-99

1999

-00

2000

-01

2001

-02

2002

-03

2003

-04

2004

-05

YEAR ->

MAJOR MINOR

NO DISTURBANCES DESPITE LOSING ENTIRE SUPER GENERATING PLANTS LIKE

RAMAGUNDAM,VIJAYAWADA,KOTHAGUDEM, NORTH CHENNAI, SHARAVATHY ETC

49RTU RTU RTU

SUB LDC SUB LDC SUB LDC

SLDC SLDC SLDC

ERLDC

WRLDC NRLDC SRLDC

NERLDC

NLDC

32 Nos.

51 Nos.

1160Nos.

Unified Grid OperationUnified Grid Operation

5 Nos.

NationalLevel

RegionalLevel

State HQLevel

Group / Distt Level

Plant / Sub-Station Level

50

RLDC,Bangalore

KalamasseryHyderabad BangaloreChennai

Cuddapah

Warangal

Vijayawada

Kalam’erry

Kannur

Trivandrum

Chennai

Erode

Madurai

Bangalore

Lingusugur

Hubli

CPCCSCC, Pondy

Hyderabad

Hierarchy of The ULDC Scheme in Southern Region

Andhra Kerala Tamilnadu Karnataka

NAME OF STATENO OF SLDC

NO OF SUB-LDC

NO OF RTU'S

ANDHRA PRADESH

1 4 101

KARNATAKA 1 3 64

KERALA 1 3 30

TAMIL NADU 1 3 87

CENTRAL SECTOR

--- --- 26

PONDY --- --- 14

TOTAL 4 13 322

51

Annual Inter-Regional Energy Transfer

≈10,000MU

Transformation Capacity ≈

45000 MVA

Transformers (220kV and above)

480 nos.

Installed Capacity≈31870 MW

Integrated Opn of Ten Power

Utilities

Dynamic Grid Conditions

Southern Region Grid Complexities in Monitoring & Control

Generators –Hydro, Thermal,Gas/IPP

422 nos.

Transmission Network 400/220kV

≈ 37500 Ckm

40,000 POINTS Active Power, Reactive Power,

Voltage, Frequency, Transformer Tap Position, Circuit Breaker Position,

Isolator Position etc.

52

GROWTH OF INSTALLED CAPACITY OF SR

1947

5

1983

0

2030

4

2129

8

2213

3

2298

3

2417

3 2616

3 2850

1

2952

6

10000

12000

14000

16000

18000

20000

22000

24000

26000

28000

30000

1994-95 1995-96 1996-97 1997-98 1998-99 1999-00 2000-01 2001-02 2002-03 2003-04

YEARS --->

IN MW

53

Kolar

Chintamani

Cudappah

HoodyHosur

Salem

Udumalpet

Madras B’lore

+/- 500 KV DC line 1370 KM

ElectrodeStation

ElectrodeStation

TALCHER

400kv System

220kv system

KOLAR

TALCHER KOLAR TALCHER KOLAR SCHEMATICSCHEMATIC

54

Inter Regional Links

Present IR CapacityPresent IR Capacity= 9,500 MW= 9,500 MW

700 MW700 MW

1200MW1200MW

2000MW2000MW

1200 MW1200 MW

900 MW900 MW30,500 MW

16,000

32,700 MW

30,500 MW

2300

1850 MW1850 MW

1650 MW1650 MW

55

13450 MW

1000 MW6450 MW

4600 MW

1300 MW3200 MW

30,000 MW OF INTER-REGIONAL POWER BY 2012

EASTERN REGION

SOUTHERN REGION

WESTERNREGION

NORTHERN REGION


INTER-REGIONAL TRANSFER BY INTER-REGIONAL TRANSFER BY END OF 11END OF 11thth PLAN (2012) PLAN (2012)

56

RESERVOIR LEVEL - COMPARISONRESERVOIR LEVEL - COMPARISON

LEVEL IN MTSLEVEL IN MTS

LEVELLEVEL31-Jul-0431-Jul-04

LEVELLEVEL31-Jul-0531-Jul-05

JALAPUTJALAPUT 831.58831.58 819.24819.24

LINGANMAKKILINGANMAKKI 544.22544.22 548.85548.85

SUPASUPA528.01528.01 542.40542.40

IDUKKIIDUKKI717.66717.66 720.08720.08

KAKKIKAKKI 963.83963.83 968.88968.88

NILGIRISNILGIRIS

TOTALTOTAL

ENERGYENERGY31-Jul-0431-Jul-04

ENERGYENERGY31-Jul-0531-Jul-05

RISE IN MURISE IN MU % RISE% RISE

275275 4747 - 228228 - 8282

19311931 29302930 999999 5151

749749 14821482 733733 9898

10661066 12161216 150150 1414

416416 555555 139139 3333

11101110 13191319 209209 1919

55465546 75497549 20032003 3636

57

320

330

340

350

360

370

380

390

400

410

42000

:05

01:0

5

02:0

5

03:0

5

04:0

5

05:0

5

06:0

5

07:0

5

08:0

5

09:0

5

10:0

5

11:0

5

12:0

5

13:0

5

14:0

5

15:0

5

16:0

5

17:0

5

18:0

5

19:0

5

20:0

5

21:0

5

22:0

5

23:0

5

TIME IN HRS --->

VO

LT

AG

E IN

KV

---

>

REALITY BITE:

FARMERS IN KARNATAKA ARE HAPPY WITH FEWER HOURS OF QUALITY POWER!!.

EFFICIENCY OF PUMPS AT TG HALLI WATER WORKS IMPROVED!

COMPARISION OF BANGALORE VOLTAGE-TYPICAL DAY

BETTER VOLTAGE PROFILE MEANS LESS ELECTRICAL LOSSES

58

WATER SUPPLY TO BANGALORE

LOW VOLTAGE PROBLEMS AROUND BANGALORE HAMPERED WATER SUPPLY EARLIER

WITH BETTER VOLTAGE NOW, PUMPING EFFICIENCY HAS IMPROVED

400 KV STATION AT MYSORE BEING COMMISSIONED ON WAR FOOTING TO FURTHER FORTIFY THIS PART OF THE GRID

PUMPING LOSSES REDUCED

ENORMOUS SAVINGS TO THE STATE

MOTOR BURNING AND MAINTENANCE COSTS ALSO CAME DOWN DRASTICALLY

59

VOLTAGE PROFILE IN SR GRID TYPICAL DAY IN OCTOBER 2004

360

370

380

390

400

410

420

430

440

RA

MA

GU

ND

AM

HY

DE

RA

BA

D

GA

ZU

WA

KA

NU

NN

A

N'S

AG

AR

KU

RN

OO

L

GO

OT

Y

NE

LLO

RE

CU

DD

AP

AH

BA

NG

ALO

RE

CH

EN

NA

I

NE

YV

ELI

VO

LT

AG

E L

EV

EL

02:00HRS

19:00HRS

60

FREQUENCY CURVE FOR 9th SEPTEMBER 2004FVI = 0.04

Avg Freq = 49.99Hz

48.5

49.0

49.5

50.0

50.5

51.0

00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23

10 * ∑ (F – 50) 2

FVI = -------------------------------

24 * 60

61


215

91

264

138

0

50

100

150

200

250

300

1 2

RA

TE

(P

AIS

A/U

NIT

)

FROM WR (608 MU) FROM ER (804 MU)

IMPORT BY SR

SR RATE WR RATE SR RATE ER RATE

62


210

163

377 366

0

50

100

150

200

250

300

350

400

450

1 2

RA

TE

(P

AIS

A/U

NIT

)

TO WR (393 MU) TO ER (86 MU)

EXPORT BY SR

SR RATE WR RATE SR RATE ER RATE

63

INTER-REGIONAL EXCHANGES DETAILS UPTO 133 WKS (Till 17.07.05)

WR ER

Net Energy Transaction

275 MU

IMPORT BY SR

717 MU

IMPORT BY SR

Amount Due to

SR Constituents

Rs. 101.26 Cr. Rs. 38.33 Cr.

Amount Credited TO SR

Constituents

Rs. 101.26 Cr. Rs. 38.33 Cr.

64

AP KAR KER TN PONDY

Total UI exported(-) /

Imported(+) in MUs

-4432 4381 1083 1376 -155

Total amount paid in Crores

Rs.-866 831 163 396 -32

Average rate of UI in paise/unit 195 190 151 288 206

SUMMARY OF UI – 133 WKS(FROM 01/JAN/03 TO 17/JUL/05)

65

UI IN SR (FROM 01/01/03 TO 17/07/05)

• TOTAL UI TURNOVER :- 8893 MU

• TOTAL UI AMOUNT DISBURSED:- 1784 CR

• AVG WEEKLY TRANSACTION:- 67 MU

• AVG WEEKLY UI AMOUNT DISBURSED:- 13.5 CR

66

Back

ODUD & UI RATE OF CONSTITUENTS

190

251

205

308

154

407

179

373

0

50

100

150

200

250

300

350

400

450

AP KAR KER TN

RA

TE

(P

AIS

A/U

NIT

)

OVER DRAWAL (PURCHASED) UNDER DRAWAL (SOLD)

207 MU

4638MU

4387 MU

6MU

1315MU

232MU

1904 MU

528MU

67

Singrauli & Rihand

2555

2530

2491 25

05

2200

2300

2400

2500

2600

2700

Pre ABT(Dec 01-Nov 02) Post ABT(Dec 02-Nov 03)

Av

era

ge

MW

Declared Capability Injection Schedule

Unchahar-1 & 2

691

687

599

653

500

550

600

650

700

750


Ave

rag

e M

W

Declared Capability Injection Schedule

Dadri (T)

711

640

619

717

500

550

600

650

700

750

800


Ave

rag

e M

W

Declared Capability Injection schedule

Anta, Auraiya & Dadri

1478

1336

1330

1636

1100

1200

1300

1400

1500

1600

1700

1800


Ave

rag

e M

W

Declared Capabilty Injection Schedule

68

Schedules as percentage of Declared Capability (DC)

97.5%

86.7%

89.9% 90.4%

99.0%

95.0%

86.3%

81.3%

75.0%

80.0%

85.0%

90.0%

95.0%

100.0%

105.0%

Pithead Unchahar-I +II Dadri (T) Combined cycle ISGS

pre-ABT (Dec 01-Nov 02)

post-ABT (Dec 02-Nov 03)

69

UI TRANSACTION ON 31/08/03

HIGHLIGHTS OF UI TRANSACTION ON 31.08.03 (SUNDAY, GANESH CHATURTHI)

• UI imported from ER : 6.07 MU• UI imported from WR : 2.81 MU• Total UI imported from C. Grid by SR : 8.88 MU• Average UI rate of C.Grid : 93 Ps/Unit • Average UI rate in SR for C.Grid : 213 Ps/Unit • Max. Power transfer in UI from ER : 510 MW• Max. Power transfer in UI from WR : 350 MW• Total Max. Power transfer in UI from C.Grid : 860 MW• Amount saved for the SR constituents : 107 Lacs• Total Number of HVDC Operations : 50 no.s

SOUTHERN REGIONAL LOAD DESPATCH CENTRE

Documents

mwdaily consumption

mudaily consumption

mw max demand met

mw eastern

karnatakainstalled capacity

keralainstalled capacity

indiainstalled capacity

sq kmno of consumers