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This review explores Integrated Resource Plans (IRPs) with a focus on flexibility assessments conducted by Portland General Electric and Puget Sound Energy. The analysis begins with a system dispatched under normal economic conditions and examines crucial factors such as wind curtailment, demand curves based on net wind loads, and production cost dispatch methodologies using AURORAxmp. Additionally, it evaluates hour-ahead balancing reserve needs through a 95% confidence interval and incorporates forecasts of reserve requirements, qualitative evaluations of generator flexibility, and insights from wind integration studies.
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IRP Review • IRPs with Significant Detail on Flexibility Assessment • Portland General Electric • Puget Sound Energy • Other IRPs
Portland General Electric • Start with system dispatched to normal economic conditions • Wind curtailment not assumed for Decs • Demand curves based on load net wind at percentiles • Supply curves based on asset dispatch changes from starting state
Puget Sound Energy • Production cost dispatch with AURORAxmp • Used load, wind, hourly scheduled interchange and forced outages for intra-hour flexibility simulation • 95% confidence interval to assess hour-ahead need for balancing reserves • Proxy CPS2 score
Other IRPs • Forecast reserve requirements • Wind integration studies • PacifiCorp forecast reserve supply • Qualitative evaluations, such as letter grade for flexible aspects of generators
