Prime-mover dynamo plants – Electric control – Engine control
Patent
1988-08-10
1990-04-24
Shoop, Jr., William M.
Prime-mover dynamo plants
Electric control
Engine control
290 43, 290 52, F01D 1510
Patent
active
049202774
ABSTRACT:
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) is formed in advance so as to not reach the S-shaped characteristics turbine operation region. A reach of the limit operation characteristics curve (nr) is detected, a rotating speed (N) of the pump turbine (2) is lowered. An inrush of the pump turbine (2) into the S-shaped characteristics turbine operation region is eliminated, so the continuation of a stable and reliable turbine operation can be guaranteed.
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Kita Eizo
Kuwabara Takao
Nakagawa Hiroto
Ducanson, Jr. W. E.
Hitachi , Ltd.
Kansai Electric Power Co., Inc.
Shoop Jr. William M.
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