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HITACHI REVIEW

Hitachi

AUTHORS

Takashi Oyake Power Plant Control Systems Engineering Dept., Information & Control Systems Div., Information & Telecommunication Systems, Hitachi, Ltd.
Akimitsu Yamazaki Power Electronics Design Dept., Electrical Control Systems Div., Information & Control Systems Div., Information & Telecommunication Systems, Hitachi, Ltd.
Kiyoshi Oka Power Electric Machine Design Dept., Hitachi Works, Power Systems, Hitachi, Ltd.

OVERVIEW

Unit 1 of the Tokyo Electric Power Co., Inc.' s Kannagawa Hydroelectric Power Station was put into commercial operation on December 22, 2005. Hitachi, Ltd. supplied a 525-MVA/464-MW generator-motor, the largest air-cooled generator-motor ever produced, and a 30-MW thyristor starter featuring state-of-the-art digital control for this power plant project. There has been a growing reassessment of hydroelectric power as clean energy that does not generate carbon emissions, and the increased generator-motor capacity and thyristor starter digital control technology developed for the Kannagawa Hydroelectric Power Station have attracted considerable interest for their beneficial impact on the global environment.

KEYWORDS

generator-motor, thyristor starter, pumped-storage, hydropower, digital

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