Method for regulating the voltage of an electric generator and a system for the application of said method
AssigneeMoteurs Leroy-Somer
InventorMichel Gobaud
Life of this patent
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Abstract
The method for regulating the terminal voltage delivered by an independent alternating-current generator consists in measuring the voltage in at least one phase, in measuring and automatically adjusting the frequency with respect to a reference value by putting dissipative resistors in circuit, and in automatically varying the reference value of the frequency as a function of variations in voltage. The invention achieves stable voltage control which prevents harmful oscillations and is applicable in particular to asynchronous generators which are driven by a natural fluid.
Claims7
A method for regulating the terminal voltage of an independent, variable-speed alternating-current generator such as a generator driven by a machine under the action of a natural fluid and especially an asynchronous generator, wherein said method consists in carrying out the following operations:
- (a) the voltage is measured in at least one of the phases of the generator;
- (b) the frequency is measured and adjusted automatically with respect to a reference value by putting dissipative resistors in circuit;
- (c) the reference value of the frequency is varied automatically as a function of the variations in voltage, the variation in reference value being in the opposite direction to the variation in measured voltage.
A system for regulating the terminal voltage of an independent, variable speed alternating-current generator such as a generator of the asynchronous type which is driven by a machine under the action of a natural fluid, wherein said system comprises:
- (a) means for measuring the voltage in at least one of the phases of the generator;
- (b) means for measuring the frequency;
- (c) means for determining a reference value of frequency;
- (d) dissipative resistors
- (e) means for comparing the measured frequency with the reference value and for putting the dissipative resistors in circuit when the measured frequency becomes higher than the reference value;
- (f) means responsive to the measured voltage in order to cause a variation in the reference value of the frequency in the direction opposite to the variations in measured voltage.
Dependencies are inferred from the claim text.