southern regional load despatch centre, bangalore
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1
SOUTHERN REGIONAL LOAD DESPATCH CENTRE, BANGALORE
POWER GRID CORPORATION OF INDIA LIMITED
ENERGY CONSERVATION IN SR - A CASE STUDY
V.K.AGRAWAL K.RAMAKRISHNA P.BHASKARA RAO V.BALAJI
AGM DGM DGM CM
2
PRESENTATION OVERVIEW
SOUTHERN REGIONAL GRID – AN OVERVIEW
TYPICAL ISSUES IN THE PAST
PRESENT CONDITIONS & CARDINAL EVENTS
TRANSMISSION NETWORK AND LOSS ANALYSIS
ACTION PLAN FOR LOSS REDUCTION
METERING AND ACCOUNTING PHILOSOPHY …
5
SOUTHERN REGION
WESTERNREGION
EASTERN REGION
NORTHERN REGION
NORTH-EASTERN REGION
INSTALLED CAPACITY
NORTHERN :- 31,307 MW
EASTERN :- 16,140 MW
SOUTHERN :- 32,779 MW
WESTERN :- 32,761 MW
NORTH-EASTERN :- 2,357 MW
TOTAL 115,344 MW
REGIONAL GRIDS
6
SOUTHERN REGION
WESTERNREGION
EASTERN REGION
NORTHERN REGION
NORTH-EASTERN 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
NORTH-EASTERN 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
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:- 32,779 MW(28.2%)
WEATHER :- South-west monsoon
North-east monsoon
SEA COAST :- AROUND 4000 KM
9
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
POPULATION :- 5.3 CRORES
AREA :- 192 (‘000 SQ KM)
NO OF CONSUMERS :- 105 LAKHS
PER CAPITA CONS. :- 642 UNITS
MAIN AGRICULTURE CROP :- COFFEE & RAGI
CLIMATIC CONDITION :- HOT AND HOT & HUMID
KERALA
POPULATION :- 3.2 CRORES
AREA :- 39 (‘000 SQ KM)
NO OF CONSUMERS :- 61 LAKHS
PER CAPITA CONS. :- 386 UNITS
MAIN AGRICULTURE CROP :- COCONUT & SPICES
CLIMATIC CONDITION :- HUMID
TAMIL NADU
POPULATION :- 6.2 CRORES
AREA :- 130 (‘000 SQ KM)
NO OF CONSUMERS :- 152 LAKHS
PER CAPITA CONS. :- 866 UNITS
MAIN AGRICULTURE CROP :- SUGAR CANE & OIL SEEDS
CLIMATIC CONDITION :- HOT AND HOT & HUMID
10
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 THERMAL GAS/DIESEL WIND/OTHERS NUCLEAR TOTAL
ANDHRA PRADESH 3586 2963 272 2 --- 6823
KARNATAKA 3332 1470 128 5 --- 4934
KERALA 1831 --- 234 2 --- 2067
TAMILNADU 1987 2970 423 19 --- 5399
PONDICHERRY --- --- 33 --- --- 33
CENTRAL SECTOR --- 8090 360 --- 830 9280
IPP 278 387 2506 1071 --- 4243
TOTAL 11014 (34%) 15880 (48%) 3956 (12%) 1099 (3%) 830 (3%) 32779 (100%)
11
15880 (48%)
11014 (34%)677 (2%)
830 (3%)422 (1.3%)
3956 (12%)
HYDRO THERMAL GAS WIND NUCLEAR OTHERS
SOURCE-WISE INSTALLED CAPACITY OF SR IN MW
32,779 MW
HYDRO
THERMAL
WINDNUCLEAR OTHERS
GAS
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 29 16 15 87
TOTAL 48 38 19 38 165
- HYDRO
- THERMAL
- GAS / NAPTHA
- NUCLEAR
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 20 9 4 33
TRIVENDRUM
15
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
17
11000
13000
15000
17000
19000
21000
23000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
HOUR ---->
DE
MA
ND
IN
MW
--->
TYPICAL LOAD CURVE OF SR
WINTER
MONSOON
SUMMER
EVENING PEAK
WEATHERRESERVOIR CONSUMPTION
19
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
20
GRID OPERATION:GRID OPERATION: A TIGHT ROPE WALK A TIGHT ROPE WALK
BLACK-OUTVOLTAGE
COLLAPSE IN-ECONOMIC
OPERATION
INSTABILITYPOWER
SWINGSINCREASED
LOSSES
22
47.00
47.50
48.00
48.50
49.00
49.50
50.00
50.50
51.00
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95
% OF TIME --->
FR
EQ
IN H
Z -
-->
2004-05
2003-04
<49.049.0 & <50.5
50.5 & Above
Max Min Avg FVI
2004-05 0.13 98.70 0.17 50.90 48.62 49.85 0.83
2003-04 2.30 97.30 0.44 51.17 48.18 49.69 1.95
2002-03 49.48 48.51 2.01 51.37 47.69 48.95 18.86
2002-03
FREQUENCY DURATION CURVE 2002-03, 2003-04 & 2004-05
FVI
23
YEAR
FREQUENCY (Hz) % OF TIME WHEN FREQUECY WAS BETWEEN
AVERAGFVIMAXIMUM
MINIMUM
AVERAGE< 48.5
HZ
48.5 TO 49.0 HZ
49.0 TO 49.5 HZ
49.5 TO 50.0 HZ
50.0 TO 50.5 HZ
> 50.5 HZ
00 – 01 51.56 47.76 48.67 53.79 17.68 13.63 12.26 2.64 ---
01 – 02 51.44 47.72 48.52 68.08 9.96 6.48 11.39 4.10 29.71
02 – 03 51.37 47.69 48.95 39.31 10.17 14.48 23.93 10.10 2.01 18.86
03 – 04 51.17 48.18 49.69 0.10 2.20 22.03 63.00 12.23 0.44 1.95
04 - 05 50.90 48.62 49.85 0.00 0.13 8.49 63.81 27.40 0.17 0.83
FREQUENCY SPECTRUM OF SOUTHERN REGION FOR PAST FIVE YEARS
24
COMPARISION OF BANGALORE VOLTAGE ON TYPICAL DAYS IN LAST FOUR YEARS
300
320
340
360
380
400
420
0:0
1
1:0
1
2:0
1
3:0
1
4:0
1
5:0
1
6:0
1
7:0
1
8:0
1
9:0
1
10
:01
11
:01
12
:01
13
:01
14
:01
15
:01
16
:01
17
:01
18
:01
19
:01
20
:01
21
:01
22
:01
23
:01
TIME IN HRS --->
VO
LT
AG
E IN
KV
---
>
2005
2002
2004
2003
26
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 ,NAGJHARI ETC
MAJOR AND MINOR DISTURBANCES IN SR SINCE 1994
27
GRID PRESENT STATUS -- CARDINAL EVENTS
• AVAILABILITY BASED TARIFF
• UNIFIED LOAD DESPATCH SCHEME
• GENERATION CAPCITY ADDITION
• INTERREGIONAL AC / HVDC LINKS
• OPERATIONAL EXCELLENCE
28
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
29
RESERVOIR LEVEL - COMPARISON
LEVEL IN MTS
LEVEL31-Jul-04
LEVEL31-Jul-05
JALAPUT 831.58 819.24
LINGANMAKKI 544.22 548.85
SUPA528.01 542.40
IDUKKI717.66 720.08
KAKKI 963.83 968.88
NILGIRIS
TOTAL
ENERGY31-Jul-04
ENERGY31-Jul-05
RISE IN MU % RISE
275 47 - 228 - 82
1931 2930 999 51
749 1482 733 98
1066 1216 150 14
416 555 139 33
1110 1319 209 19
5546 7549 2003 36
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