1 RTWG Report to TAC October 1, 2009 Henry Durrwachter.

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Presentation transcript:

1 RTWG Report to TAC October 1, 2009 Henry Durrwachter

2 Report from September RTWG Meeting Presentation on flywheel storage technology from Power Tree Corp. –Currently building a flywheel that is 120" tall and 48" wide weighing approximately 80 thousand pounds (4 th generation design). –Unit exterior containment is 11 feet wide, 11 feet tall and 30 feet long (about the size of a semi-trailer). –Operating characteristics (at 10,000 rpm): 8.1 megawatt hours 90% input/output efficiency

3 Report from September RTWG Meeting Presentation on concentrating solar power (CSP) technology by Acciona Solar Power, Inc. –Technical data on Nevada Solar One, a 64 MW CSP plant placed in service in 2007 –CSP output fits ERCOT summer peak better than wind due to thermal storage capability –Acciona is working on at least two utility-scale CSP projects in ERCOT

4 Report from September RTWG Meeting Reviewed whitepapers on: –Wind Ramping Events (Walter Reid) –Potential applications for storage technologies in ERCOT (Steve Isser) Additional discussion centered around need for additional ERCOT resources (human and computer) to accomplish many of the issues that the RTWG has identified and that the Market Participants have addressed through new PRRs and NPRRs. Issue for TAC consideration: –How can increasingly large amounts of variable renewable resources be reliably integrated into the ERCOT grid given the limited amount of resources (financial and personnel) likely to be available to ERCOT in the foreseeable future?

5 Future Work Take input from ERCOT Board (on Oct. 19) on draft Texas Renewables Implementation Plan (TRIP) with the intent to finalize that document by the end of this year. Complete 3 rd Quarter Report for the PUCT and submit for TAC approval in November. Presentation on applicability of storage technologies in ERCOT from an outside expert (December 2009).

6 Questions?