Transcript Slide 1

Ancillary Services in Indian Context
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Outline
 Definition
 Drivers for Ancillary Services
 Ancillary Services in Indian Context
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Definition
 As per draft IEGC, 2010…..
“Ancillary services in power system (or grid) operation
means services necessary to support the power
system (or grid) operation in maintaining power
quality, reliability and security of the grid, e.g active
power support for load following, reactive power
support, black start etc”
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Drivers
 Reliability and Security
 Deregulated Power Systems
 Changing Nature of Electricity Grid
 Services to be obtained from Service Providers
 Cannot be coupled with basic energy services
 Use of UI surplus amount as per UI regulations –
March 2009
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Pillars of Market Design
Sally Hunt – ‘ Making Competition Work in Electricity’
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Ancillary Services in Indian Context
 Proposed Ancillary Services in India
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Frequency Control Ancillary Services (FCAS)
Network Control Ancillary Services (NCAS)
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Power Flow Control Ancillary Services (PFCAS)
Voltage Control Ancillary Services (VCAS)
System Restart Ancillary Services (SRAS)
 Compensation through UI surplus fund
 Limited to Operational Expenditure
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Frequency Control Ancillary Services (FCAS)
 Mis-matches between supply and demand
 IEGC band – 49.2 to 50.3 Hz
 Wide fluctuations in frequency
 Primary Response : FGMO
 Secondary Response : Absent by Design
 Tertiary Response
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Availability Based Tariff (ABT)
Use of Un-Requisitioned Surplus
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Scheduled to the ‘POOL’
Merit order
Peaking Gas Stations
Pumped Storage Plants
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Network Control Ancillary Services (NCAS)
 Power Flow Control Ancillary Services (PFCAS)
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Control power-flow on interconnectors
Utilizing URS
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Schedule to ‘POOL’
Based on both location and merit order
 Voltage Control Ancillary Services (VCAS)
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Provision in IEGC for VAr drawl
Synchronous condenser operation
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Friction and windage losses
Auxiliary consumption
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System Restart Ancillary Services (SRAS)
 Black Start of Power Stations
 Provision for mock exercises
 Might be linked to a fraction of fixed cost recovery
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Thank you !!
Email ID: [email protected]
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