1
Takao Kuwabara, Hiroto Nakagawa, Eizo Kita: Control system for a variable speed hydro-power plant apparatus. Hitachi, Kansai Electric Power Co, Fay Sharpe Beall Fagan Minnich & McKee, April 24, 1990: US04920277 (21 worldwide citation)

A variable speed hydro-power plant includes a pump turbine (2) having a S-shaped characteristics at the turbine operation. A current time turbine operating point is grasped on a turbine characteristics diagram of the pump turbine (2). A limit operation characteristics curve (nr) of the pump turbine ...


2
Kuwabara Takao, Nakagawa Hiroto, Kita Eizo: Control system for a variable speed hydro-power plant apparatus.. Hitachi, Kansai Electric Power Co, February 15, 1989: EP0303170-A2 (4 worldwide citation)

A variable speed hydro-power plant includes a pump turbine (2) having a S-shaped characteristics at the turbine operation. A current time turbine operating point is grasped on a turbine characteristics diagram of the pump turbine (2). A limit operation characteristics curve (nr) of the pump turbine ...



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