1 WIND POWER FORECASTING AND POWER DISPATCH INTEGRATION IN INDIAN CONTEXT P.R.RAGHURAM Presentation Plan • Southern Region Power system Overview • Review of Wind Power Generation in SR • Issues to be addressed for better system operation • The way Indian Power system operates vis- a-vis in a developed country • Real time operational issues • Market issues • Conclusion
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1
WIND POWER FORECASTING AND
POWER DISPATCH INTEGRATION IN
INDIAN CONTEXT
P.R.RAGHURAM
Presentation Plan• Southern Region Power system Overview• Review of Wind Power Generation in SR• Issues to be addressed for better system
operation• The way Indian Power system operates vis-
a-vis in a developed country• Real time operational issues• Market issues • Conclusion
5. Contribution of wind power to ancillary service6. Institutional issues
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Real time system operation Issues
• Difference between our grid & developed country grid
• Managing Load Generation Balance during normal System operation
• Managing Load generation Balance during High Wind power integration
Difference between our grid & developed country grid
• Our grid is both Energy and Capacity deficit power system
• Our grid does not have spinning reserve or secondary /tertiary reserve
• We work on sliding frequency between 49Hz and 50.5 Hz
• Spot market is yet to be fully developed• We do not have ancillary service such as
– Market for energy imbalance– Load following service
• Following service is not considered for payments– Black Start– Reactive energy generation /absorption by generator
• We have a scientific settlement system in ABT which is a local solution for the above mentioned local problems
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Managing Load Generation Balance during normal System operation
• Load generation imbalance occur due to– Generators tripping– Transmission line outages– Tools available to system operator to overcome this
• Using available reserve• Free governor mode of operation of generator• Special System protection scheme• Automatic under frequency load relief operation
• Load generation imbalance will also occur due tocontinuous variation in demand and lot of tools are available to predict the same in advance and take corrective action
GENERATION vs FREQUENCY FOR
10
30
50
70
90
08:2
1
09:2
1
10:2
1
11:2
1
TIME IN HH:MM ----->
MW
----
->
49.00
49.20
49.40
49.60
49.80
50.00
50.20
50.40
FRE
Q IN
HZ
----
->FREE GOVERNOR MODE OF OPERATION Typical graph
SHARAVATHI -1
FREQ DROP FROM 49.72 HZ TO 49.27 HZ
i.e. ~ 0.45HZ
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DEEP VALLEY
DEEP VALLEY
SHARP
PEAK
Managing Load generation Balance during High Wind power integration• Un predictable variation in Power output