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Understanding Pumped Storage Hydropower

Michael Manwaring, HDR EngineeringUnderstanding Pumped Storage HydropowerMichael Manwaring, HDR EngineeringChair, NHA Pumped Storage Development CouncilNovember 2012 Presentation Agenda General Overview Historic Perspective Variable Renewable Energy Integration Siting a Pumped Storage Project Water Resource Needs Transmission Needs & Siting Transmission Needs & Siting Overview of MarketsExisting Pumped Storage ProjectsJocassee & Bad Creek Pumped Storage Projects (Duke, South Carolina) Pumped Storage Project Design SchemePumped Storage Project Design SchemeOverview: Challenges to Develop Pumped StorageProjects are Capital Intense Licensing ($millions) Construction/Operation ($billions)Markets Limitations: Valuing services Pumped Storage and conventional Hydropower provide (missing revenue)

Power quality Load leveling Energy Storage Technology Operating principle System output Cycle efficiency Applications Two electrolytes are separately stored 60 - 80% min - hours / seconds Load leveling Renewables storage Massive rotating cylinder stores/delivers energy via 95% Voltage/Frequency sec - min / stabilization 100 kW – 10 MW 100 kW ...

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