Control system for variable speed hydraulic turbine generator apparatus
First Claim
1. A control system for variable speed hydraulic turbine generator apparatus comprising:
- an induction generator connected at its primary side to an AC power line system;
a secondary excitation controller connected to the secondary side of said induction generator and being responsive to a generator output command signal supplied externally to supply to said induction generator an excitation current which causes said induction generator to generate AC power at the same frequency as that on said AC power line system;
a hydraulic turbine for rotating said induction generator;
a guide valve for regulating the amount of water supplied to said hydraulic turbine;
a rotation speed detector for detecting a rotation speed of said induction generator;
a rotation speed command calculator for receiving a hydraulic turbine running condition signal inclusive of said external generator output command signal and calculating an optimum rotation speed command;
a rotation speed controller for comparing said optimum rotation speed command with a rotation speed signal from said rotation speed detector and producing a guide valve opening control signal in accordance with a difference between said optimum rotation speed command and said rotation speed signal; and
a guide valve drive responsive to said guide valve opening control signal to deliver to said guide valve a signal which controls the opening of said guide valve in accordance with said guide valve opening control signal.
1 Assignment
0 Petitions
Accused Products
Abstract
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 excitation 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 valve for regulating the amount of water supplied to the hydraulic turbine, a rotation 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 valve opening control signal in accordance with a difference between the optimum rotation speed command and the rotation speed signal, and a guide valve driver responsive to the guide valve opening control signal to deliver to the guide valve a signal which controls the opening of the guide valve in accordance with the guide valve opening control signal.
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Citations
10 Claims
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1. A control system for variable speed hydraulic turbine generator apparatus comprising:
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an induction generator connected at its primary side to an AC power line system; a secondary excitation controller connected to the secondary side of said induction generator and being responsive to a generator output command signal supplied externally to supply to said induction generator an excitation current which causes said induction generator to generate AC power at the same frequency as that on said AC power line system; a hydraulic turbine for rotating said induction generator; a guide valve for regulating the amount of water supplied to said hydraulic turbine; a rotation speed detector for detecting a rotation speed of said induction generator; a rotation speed command calculator for receiving a hydraulic turbine running condition signal inclusive of said external generator output command signal and calculating an optimum rotation speed command; a rotation speed controller for comparing said optimum rotation speed command with a rotation speed signal from said rotation speed detector and producing a guide valve opening control signal in accordance with a difference between said optimum rotation speed command and said rotation speed signal; and a guide valve drive responsive to said guide valve opening control signal to deliver to said guide valve a signal which controls the opening of said guide valve in accordance with said guide valve opening control signal. - View Dependent Claims (2)
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3. A control system for variable speed hydraulic turbine generator apparatus comprising:
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an induction generator connected at its primary side to an AC power line system; a secondary excitaton controller connected to the secondary side of said induction generator and being responsive to a generator output command signal supplied externally to supply to said induction generator an excitation current which causes said induction generator to generate AC power at the same frequency as that on said AC power line system; a hydraulic turbine for rotating said induction generator; a guide valve for regulating the amount of water supplied to said hydraulic turbine; a rotation speed detector for detecting a rotation speed of said induction generator; a hydraulic turbine characteristic function generator for receiving a hydraulic turbine running condition signal inclusive of said external generator output command signal, and calculating and producing an optimum rotation speed command and a guide valve opening control signal; a rotation speed controller for comparing said optimum rotation speed command with a rotation speed signal from said rotation speed detector and producing a guide valve opening correction signal is accordance with a difference between said optimum rotation speed command and said rotation speed signal; a first adder for adding together said guide valve opening correction signal and said guide valve opening control signal to produce an output signal; and a guide valve driver responsive to the output signal from said first adder to deliver to said guide valve a signal which controls the opening of said guide valve in accordance with said output signal. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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Specification