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Regulation Energy Management Overview

Regulation Energy Management Overview. CPUC Energy Storage Workshop March 9, 2011. Regulation energy management provides additional functionality to address limitations of storage resources. Limited energy resources unable to participate in day-ahead regulation market at full capacity w/o REM

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Regulation Energy Management Overview

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  1. Regulation Energy Management Overview CPUC Energy Storage Workshop March 9, 2011

  2. Regulation energy management provides additional functionality to address limitations of storage resources. • Limited energy resources unable to participate in day-ahead regulation market at full capacity w/o REM • Barriers to entry still existed even with March 2010 ancillary services modifications to support non-generation resources 20 MW 15 MW Regulation Up 10 MW 5 MW 0 MW Example: 20 MW / 5 MWhlimited energy resource Green – prior requirement Yellow – regulation energy management 45 60 15 30 Minutes Approved by ISO Board February 2010. Implementation Spring 2012

  3. Regulation energy management maintains resources state of charge to meet continuous energy requirement • Utilize real time energy market for energy offset • Regulation and energy settlement similar to conventional generation • Regulation dispatch and energy offset keep state of charge near midpoint • Additional information at http://www.caiso.com/27be/27beb7931d800.html

  4. March 2010 ancillary services modifications to support non-generation resources • Removed resource type restrictions and reduce minimum rated capacity to 500 kW from 1MW • Reduced minimum continuous energy requirement from 2 hours to: • Day-Ahead Regulation Up/Down: 60 minutes • Real-Time Regulation Up/Down: 30 minutes • Spin and Non-Spin: 30 minutes • Minimum continuous energy measured from the period that the resource reaches the awarded energy output • Measurement starts once resource reaches awarded energy, not end of 10 minute ramp requirement Approved by FERC September 2010

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