Water and Energy Abstracts
Year : 2004, Volume : 14, Issue : 1
First page : ( 38) Last page : ( 39)
Print ISSN : 0021-1672.

100. Underground Pumped Hydro Storage (UPHS)

Tanaka Kuninori, Wada Fumio, Sakurai Hitoshi

(Proceedings, Hydro 2003, Vol. I, Croatia, pp. 341–346).

Abstract

Underground Pumped Hydro Storage (UPHS) power generation is one of the energy storage systems and it gives rise to less constraint in the topographic condition and smaller load on the environment compared with the conventional pumped hydro storage power generation. Therefore, future utilization of UPHS is expected. In this paper, the UPHS technical investigation carried out from f.y. 1997 to f.y. 2002 is introduced especially focusing on ultra high head (800 m class) power generation equipment. To the subject of development of UPHS, in this investigation, we checked technical/economical possibility of it and proved that it is practical enough as one choice of load equalization technology by new technical development and application of existing technology. At the stage of construction of UPHS, as same as conventional pumped hydro storage, such verification tests as hydraulic phenomenon of lower reservoir and the welding material for a pump-turbine are expected. The necessity of power resources for load equalization is also expected in the future. In the situation that construction of conventional pumped hydro storage became difficult in terms of environment restrictions, the expectation for UPHS with the high possibility of realization with few technical subjects as a storage power supply is large. Construction of demonstration plant is expected for realizing UPHS.

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Keywords

Energy storage systems, Topographic condition, Environment, Ultra high head.

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