Hydraulic Transients—Helms Pumped Storage Project

by Richard D. Stutsman, Pacific Gas & Electric, San, Francisco, CA, USA,
Robert A. Lambert, Pacific Gas & Electric, San, Francisco, CA, USA,

Document Type: Proceeding Paper

Part of: Waterpower '85


Pacific Gas and Electric Company's Helms Pumped Storage project is a large underground hydroelectric development which went into commercial operation in June 1984. Because of its complexity, PGandE felt that classic methods of analyzing surge and waterhammer were inadequate. PGandE decided to develop a computer program which models these transient conditions by the method of characteristics. The program, named 'HAMMER' combines this computer modeling technique with pump-turbine performance data (four quadrant curves), and turbine wicket gate operation to give very good results. 'HAMMER' was not only used to aid in the design of the project's hydraulic components, but was used very successfully during start-up of Helms.

Subject Headings: Hydraulic transients | Transient response | Waste storage | Water storage | Energy storage | Hydraulic models | Hydraulic design | Hydro power

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