impact of abt, network strengthening on grid operation in karnataka southern regional load despatch...
TRANSCRIPT
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IMPACT OF ABT, NETWORK STRENGTHENING ON GRID OPERATION
IN KARNATAKA
SOUTHERN REGIONAL LOAD DESPATCH CENTRE
POWER GRID CORPORATION OF INDIA LIMITED
ADVANTAGE KARNATAKA
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ADVANTAGE KARNATAKA• HARNESSING THE VAST HYDRO POTENTIAL
– EFFECTIVE USE OF HYDRO TO SECURE BEST PRICES– DEPLETED RESERVOIRS SPARINGLY USED– CONSERVATION FOR PEAK
• OPTIMAL RESOURCE UTILISATION– EXEMPLARY PERFORMANCE IN UI MARKET
– SCHEDULING FOR MAX RETURNS!
• GRID DISTURBANCES ARE A THING OF THE PAST
• VAST IMPROVEMENT IN GRID PARAMETERS
• LOSSES REDUCED
SHARAVATHY
UI SUMMARY
SCHEDULE
DISTURBANCES
BLR VOLTAGE
TECHNICAL LOSS
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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.
OPTIMAL RESERVOIR UTILISATIONSHARAVATHY IN KARNATAKA
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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
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UI SUMMARY – 116 WKSFROM 01/JAN/03 TO 20/03/05)
STATE ---> AP KAR KER TN PON
Total Net UI in MUs exported(-) / Imported(+)
-4195 3868 1195 1069 -88
Total Net amount in Rs. Crores
Receivable(-) / Payable(+)
-859 718 206 311 -16
Average rate of UI in paise/unit
204 186 173 291 188
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INTER-REGIONAL EXCHANGES DETAILS UPTO 116 WKS (Till 20-MAR-05)
WR ER
Net Energy Transaction
112 MU
IMPORT BY SR
725 MU
IMPORT BY SR
Amount Due to
SR Constituents
Rs. 40.54 Cr. Rs. 3.94 Cr.
Amount Credited TO SR Constituents
Rs. 40.54 Cr. Rs. 3.94 Cr.
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WR ER
Net Energy Transaction
82 MU
IMPORT BY SR
707 MU
IMPORT BY SR
Amount Due to
SR Constituents
Rs. 36.07 Cr. Rs. 2.36 Cr.
Amount Credited TO SR
Constituents
Rs. 36.07 Cr. Rs. 2.36 Cr.
INTER-REGIONAL EXCHANGES DETAILS UPTO 105 WKS (Till 26.12.04)
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OD UD AND UI RATES OF CONSTITUENTS
247
186 178
247205
372
260
146
0
50
100
150
200
250
300
350
400
450
500
AP KAR KER TN
RA
TE (P
AIS
E/U
NIT
)
OVER DRAWAL (PURCHASE) UNDER DRAWAL (SOLD)
52 MU
4247 MU
6 MU
3874 MU
1276 MU
82 MU
1536 MU
467 MU
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0
500
1000
1500
2000
2500
00:1
5
01:1
5
02:1
5
03:1
5
04:1
5
05:1
5
06:1
5
07:1
5
08:1
5
09:1
5
10:1
5
11:1
5
12:1
5
13:1
5
14:1
5
15:1
5
16:1
5
17:1
5
18:1
5
19:1
5
20:1
5
21:1
5
22:1
5
23:1
5
TIME --->
DC
, SC
HE
DU
LE
& A
CT
UA
L (
MW
)
49.0
49.5
50.0
50.5
51.0
51.5
FR
EQ
UE
NC
Y IN
HZ
---
>
Entitlement Schedule Actual Frequency
Schedule Vs Actual Drawal by KAR
Entitlement ά
Capacity Charges
Schedule ά
Energy Charges
Actual Drawal
Frequency
U I
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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
MAJOR AND MINOR DISTURBANCES SINCE 1994
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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
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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
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Technical Losses w.r.t. Voltage
• Power (P)= Voltage * Current = V*I• Losses = (Current)2 * Resistance = I2*R• Power is proportional to current, voltage remaining
constant.• To draw the same power at low voltage, one has to draw
more currente.g.; 100 MW = 400kV * 250 Amps 100 MW = 320kV * 312 AmpsLosses increases by 55% for 20%reduction in voltage. Losses doubles for about 30% reduction in voltage.
e.g. Loss reduction in SR by 1% has given an annual saving of about Rs 290 crores
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SOUTHERN REGION LOSS*
2002 2003 2004** 2005**
LOAD (MW)
LOSS (MW)
LOSS %
LOAD (MW)
LOSS (MW)
LOSS %
LOAD (MW)
LOSS (MW)
LOSS %
LOAD (MW)
LOSS (MW)
LOSS %
AP 6510 408 6.27 5983 264 4.41 7234 311 4.30 7557 279 3.69
KARNATAKA 4078 265 6.50 4609 237 5.14 5158 228 4.42 5285 183 3.46
KERALA 1928 82 4.25 2227 101 4.54 2479 86 3.47 2453 66 2.69
TAMILNADU 6135 224 3.65 6888 240 3.48 7421 198 2.67 7522 216 2.87
PONDICHERRY 215 0 0.00
CENTRAL GENERATING STATION 472 0 0.00 684 0 0.00 538 0.00 121 0 0.00
SOUTHERN REGION 19123 979 5.12 20391 842 4.13 22830 823 3.60
23153 744 3.21
•*Source : Report of System Studies conducted for Accessing Shunt Compensation requirement in Southern Region – March 2004 and March 2005 - SREB ,CEA
•** Projected figures