E3_EDT_Phase2_Methodology_and_Sensitivities_2011-04-22

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Summary of Phase 2 <strong>Methodology</strong>by Reserve TypeType ofReserveTraditionalRegulation +ContingencyMet LocallyContingencyProcured fromWider AareaFlexibilityReserve ProcurementRequirementBenchmark & EIM Case:Fixed 75% portion of 6%conventional reserverequirementBenchmark & EIM Case:Remaining 25% of 6%conventional reserverequirementBenchmark Case:NREL-provided Hourly MWneed for each of 24 zonesEIM Case: NREL-providedHourly MW need foraggregate EIM footprintGeography of generationthat can meet reserveneedsBenchmark & EIM Case:From within local 24 ZonesBenchmark & EIM Case:From within 7 Reserve ProcurementAreasBenchmark Case:From within local 24 zonesEIM Case: Throughout EIM footprint*Note: Generator ramp rate constraints enforced in all cases for reserve needs.Simulation holds fulfillment of reserves requirements in dispatch.20
4. Use day ahead forecast of windoutput for unit commitment cycleNREL data provides historical day-aheadforecasts of the actual 2006 wind profilesused for TEPPC• Phase 1 Gridview simulations: use perfect foresightto optimize day ahead unit commitmentPhase 2: Will explore impact of day-aheaduncertainty of wind output by committingunits based on day-ahead forecasts ofhistorical wind profiles• Potentially could result in wind curtailment(or load curtailment) in limited number of hoursif day-ahead forecast is too low (or too high)• May result in reduced efficiency in all cases• EIM case likely to respond more easily due todiversity <strong>and</strong> deeper resource stack• Approach not well tested, so may need to useas sensitivity case only21
Page 5: About E3E3’s expertise has placed
Page 8 and 9: Phase 2 Overview & MotivationOveral
Page 10 and 11: Phase 2 CasesThe analysis will cons
Page 12 and 13: Key Assumptions to Phase 2 CasesUpd
Page 14 and 15: 1. Proposed 24 Zone Modelfor Phase
Page 16 and 17: 2. Modified conventional reservereq
Page 18 and 19: 3. Flexibility Reserve Requirement
Page 22 and 23: 5. Price-ResponsiveHydro Modeling (
Page 24 and 25: Anticipated Impact of RevisedPhase
Page 26 and 27: Section 3: Phase 2 StudyProposed Se
Page 28 and 29: Additional Sensitivity AnalysisAs t
Page 30 and 31: Sensitive Case PrioritizationOrder
Page 32: E3 Contact InformationEnergy and En

E3_EDT_Phase2_Methodology_and_Sensitivities_2011-04-22

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