Transcript Pres- Wind Coalition Issues with Retrofit Requirements

ISSUES WITH RETROFIT
REQUIREMENTS FOR HVRT
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CURRENT SITUATION
• WGRs HAVE HAD A CLEAR LIMIT OF 1.1 pu
SPECIFIED FOR HVRT IN THE GUIDES
• WGRs ARE NOW BEING DEVELOPED
THROUGHOUT ERCOT IN MANY STAGES OF
COMPLETION BASED UPON CURRENT
STANDARDS
• ERCOT PANHANDLE STUDIES INDICATE
CERTAIN CONTINGENCIES CAN RESULT IN
VOLTAGE SWINGS EXCEEDING 1.1 pu
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CURRENT SITUATION
• CURRENTLY DEVELOPERS ARE CONTACTING
VENDORS AND PERFORMING STUDIES TO
DETERMINE THE ABILITY TO COMPLY WITH
HIGHER HVRT REQUIREMENTS
• A NERC HVRT STANDARD (PRC-024) IS BEFORE
FERC FOR FINAL APPROVAL; IF APPROVED,
PRC-024 ALLOWS FOR A 5 YEAR PHASE IN
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KEY ISSUES/QUESTIONS
• IT IS NOT CLEAR WHY THE CURRENT HVRT
STANDARDS ARE NOT WORKABLE
• DEVELOPERS MAKE SIGNIFICANT
COMMITMENTS WELL BEFORE THEY SIGN THE
SGIA MAKING UNTIMELY CHANGES COSTLY
• THE COMPLETED TSP FISs IN THE PANHANDLE
DO NOT INDICATE ANY VOLTAGE SWING
PROBLEMS
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KEY ISSUES/QUESTIONS
• UNDER WHAT CONDITIONS DO THE STUDIES
INDICATE POSSIBLE PROBLEMS
• ARE THE MODELS CORRECT
• CHANGES TO STANDARDS MUST BE MADE
WITH ENOUGH LEAD TIME TO ALLOW THE
INDUSTRY TO RESPOND EFFICIENTLY
• NEW HVRT STANDARDS APPLIED TO THE POI
ARE FAR MORE DEMANDING THAN HVRT
STANDARDS APPLIED TO THE TURBINES
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KEY ISSUES/QUESTIONS
• ANY CHANGES THAT ARE SHOWN TO BE
NECESSARY AND EFFICIENT MUST BE PHASED
IN (PRC-024 ALLOWS FOR 5 YEARS FOR FULL IMPLEMENTATION)
• IF NEED IS DEMONSTRATED ONLY IN THE
PANHANDLE, THEN OTHER AREAS SHOULD
NOT BE INCLUDED IN NEW STANDARDS
• IF NEED IS DEMONSTRATED THEN ALL
TECHNOLOGIES IN THE PANHANDLE SHOULD
BE INCLUDED, NOT JUST WGRs
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KEY ISSUES/QUESTIONS
• COMPLIANCE EVALUATION CRITERIA NEED TO
BE ESTABLISHED WHICH PROVIDE MODELING
REQUIREMENTS AND ASSUMPTIONS TO BE
USED BY DEVELOPERS/TSPs
• THRESHOLDS OF PANHANDLE DEVELOPMENT
NEED TO BE ESTABLISHED WHERE THE HIGH
VOLTAGE PROBLEMS FIRST APPEAR
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WGR PROJECT DEVELOPMENT
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ACQUIRE LAND (LEASES)
WIND SURVEY
ERCOT INTERCONNECT REQUEST
PRELIMINARY DESIGN
CONTRACT FOR TURBINES/ WARRANTIES
CONTRACT FOR CONSTRUCTION/WARRANTIES
FINAL DESIGN
FIS REQUEST
CONTRACT FOR BOP
CONTRACT FOR PPA/FINANCIAL HEDGES
FIS COMPLETED
OBTAIN FINANCING
SIGN SGIA
POST SECURITY
BUILD
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