Pump Storage:A System Operations Perspective

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Pump Storage: A System Operations Perspective Sam Holeman

Power System Engineer 25 years at Duke Energy 7 yrs - Energy Management System Development

Generation Resource Commitment logic Generation Economic Dispatch logic Power Flow logic

18 yrs – Bulk Electric System Operations NERC Certified System Operator-Reliability 0 yrs – Pump Storage Asset Operations 0 yrs – Pump Storage Asset Main

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In Light of This….The New Title is……

Pump Storage: The Duct Tape of System Operations

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Duke Energy Carolinas Generation Mix These are approximations Total Generation Capability – 21,000 MWs

Nuclear – 7000 MWs Fossil (Coal) – 7600 MWs Combustion Turbines – 3100 MWs Conventional Hydro – 1100 MWs Pump Storage Hydro – 2000 MWs

Pump Storage Hydro (MWs) – approx. 9.5% of capacity Pump Storage Generation (MWhrs) – approx. 2.5% of energy generated

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From the view of System Operations……

Bad Creek Pumped-Storage Generating StationCapacity: 1,065 megawatts Location: Oconee County, South Carolina Commercial Date: 1991

Jocassee Pumped-Storage Generating StationCapacity: 610 megawatts Location: Pickens County, South Carolina Commercial Date: 1973

Numbers don’t tell the story of the value of Pump Storage!

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The Pump Storage System Operations Story

NERC Interconnected Operations Services Operating Reserves Regulating Reserves/Load Following Contingency Reserves Reactive Power Supply Frequency Response

From the eyes of System Operations Dependable Flexible Fast/ Nimble Our Duct Tape

0:00 0:48 1:35 2:24 3:12 3:59 4:48 5:36 6:23 7:12 8:00 8:48 9:36 10:2411:1212:0012:4813:3514:2415:1215:5916:4817:3618:2319:1220:0020:4821:3622:2423:12

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Bad Creek Jocassee Load

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awat

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awat

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Operating Reserves/Load Following/Regulating Reserves

11:45

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Bad Creek Jocassee ACEEmergency Energy Request - 500 MW

Meg

awat

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Contingency Reserves/Emergency Response

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59.94

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Bad Creek Jocassee ACE Freq

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awat

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uenc

y

The Real Time Whole Ball of Wax – Pump Storage At Its Best