SCE's 2010 Demand Response Load Impact Evaluations Portfolio Summary

This report summarizes the load reduction capability from Southern California Edison’s (SCE) portfolio of Demand Response programs. It details the load impacts from 2010 events (ex post impacts) and load reduction capabilities for 2011 through 2021 under 1-in-2 and 1-in-10 system conditions (ex ante impacts). Under 1-in-2 system conditions, SCE's DR portfolio is projected to grow from 1,265 MW in 2011 to 1,793 MW in 2014 and then remain stable thereafter. Under 1-in-10 system conditions, the aggregate load impact is 5% to 7% higher in each year. Once the programs reach a steady state in 2014, SCE's DR portfolio is expected to deliver 1,906 MW for the 1-in-10 August system peak day. In addition to load impact estimates, the report provides an overview of SCE's DR programs, discussion of the methodologies used in the 2010 evaluations and a summary of recommendations. The report adheres to the April 8, 2010 decision by the California Public Utilities Commission that requires a DR portfolio summary and specifies the format and content of the summary.

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