ercot vrt voltage ride through standards. standards groups edison electric institute (eei) national...
TRANSCRIPT
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ERCOT VRT
Voltage Ride Through Standards
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Standards Groups
• Edison Electric Institute (EEI) • National Electrical Manufactures Association (NEMA) • American National Standard Institute (ANSI)
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Standards Groups
• Federal Energy Regulatory Commission (FERC)
• National Electric Reliability Council (NERC)• Western Electricity Coordinating Council
(WECC)• Electric Reliability Council Of Texas
(ERCOT)
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FERC Wind-Power Connection Standards
• July 2005: Order 661• July 2005: NERC Request for Rehearing
• December 2005: Order 661 -A
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SPWG Proposal
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WECC Proposal
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NERC Possible Proposal
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FERC Order 661a
• Remain connected for – bolted three phase fault cleared in less than 9
cycles– Single line to ground fault with delayed clearing
(zone 2) plus voltage recovery time
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GRANDFATHER
• Existing facilities• Signed IAs as of effective date• Commercial within 12 months of effective
date• Can demonstrate to ERCOT that contracting,
engineering, or procurement make compliance commercially infeasible
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Policy Decision
ERCOT set a standard more stringent than FERC or WECC existing standards
OR
ERCOT adopt FERC standard and wait for NERC standard