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This document discusses the capacity analysis conducted during the Sixth Plan GRAC Meeting on May 6, 2009. It covers capacity standards, surplus, sustained peaking reserve margin, and various capacity metrics. The document also provides estimations for sustained hydro capacity.
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Capacity Analysisin theSixth Plan GRAC MeetingMay 6, 2009
Capacity StandardSurplus Sustained Peaking Reserve Margin • The sustained peak generating capability of firm (and some non-firm) resources should equal the sustained peak load plus a surplus derived from the LOLP analysis. • The minimum threshold is derived from an analysis that yields a 5% loss-of-load probability for capacity events.
Capacity StandardSurplus Sustained Peaking Capability Peak Duration Load • Averaged over the peak duration hours – 6highest load hours/day over 3 consecutive weekdays • Based on normal weather • Includes net interregional firm contracts
Capacity StandardSurplus Sustained Peaking Capability Resources – Averaged over the peak duration • Uncommitted in-region IPP generation • Winter – all available • Summer – 1000 MW • Hydroelectric – Critical year for winter and summer • Wind – 5 percent of nameplate • Out-of-region market supply • Winter – 3000 MW • Summer – Zero • Hydro Flexibility • Winter – 2000 MW • Summer – 1000 MW
Estimating Sustained Hydro Capacity(6-hour duration) Illustrative Only
