H - Electricity – 02 – P
Patent
H - Electricity
02
P
341/91
H02P 9/42 (2006.01) H02P 9/00 (2006.01) H02P 9/04 (2006.01)
Patent
CA 1273695
ABSTRACT OF THE DISCLOSURE A control system for variable speed hydraulic turbine generator apparatus comprises an induction generator connected at its primary side to an AC power line system, a secondary excitation controller connected to the secondary side of the induction generator and being responsive to a generator output command signal supplied externally to supply to the induction generator an excita- tion current which causes the induction generator to generate AC power at the same frequency as that on the AC power line system, a hydraulic turbine for rotating the induction generator, a guide vane for regulating the amount of water supplied to the hydraulic turbine, a rota- tion speed detector for detecting a rotation speed of the induction generator, a rotation speed command calculator for receiving a hydraulic turbine running condition signal inclusive of the external generator output command signal and calculating an optimum rotation speed command, a rotation speed controller for comparing the optimum rotation speed command with a rotation speed signal from the rotation speed detector and producing a guide vane opening control signal in accordance with a difference between the optimum rotation speed command and the rota- tion speed signal, and a guide vane driver responsive to the guide vane opening control signal to deliver to the guide vane a signal which controls the opening of the guide vane in accordance with the guide vane opening control signal.
518847
Bando Akira
Haraguchi Eiji
Kuwahara Takao
Nakagawa Hiroto
Nohara Haruo
Bando Akira
Haraguchi Eiji
Hitachi Ltd.
Kirby Eades Gale Baker
Kuwahara Takao
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