Electricity: single generator systems – Automatic control of generator or driving means – Speed or frequency of generator
Patent
1988-01-15
1989-09-26
Hickey, R. J.
Electricity: single generator systems
Automatic control of generator or driving means
Speed or frequency of generator
307 87, 322 32, H02H 706
Patent
active
048703397
ABSTRACT:
A variable-speed power generating system comprises a variable-speed generator electrically connected at its primary winding to an electric power system and its secondary winding to the electric power system through a frequency converter and mechanically coupled to a driver driving the secondary side thereof, a phase detector generating an output signal representing a slip frequency in response to the application of a first input having a frequency component of an output generated from the primary winding of the variable-speed generator and a second input having a frequency component corresponding to the rotation speed of the driver, a controller controlling the frequency converter on the basis of a reference phase provided by the output signal of the phase detector, and regulating means for controlling the frequency converter so that, when the variable-speed generator is disconnected from the electric power system, the frequency applied to the secondary winding of the variable-speed generator may not deviate from a predetermined allowable range of variable frequency operation of the frequency converter.
REFERENCES:
patent: 3887820 (1975-06-01), Glennon
patent: 4308465 (1981-12-01), Lafuze
Furukawa Yosio
Haraguchi Eiji
Nagura Osamu
Nakagawa Hiroto
Oono Yasuteru
Hickey R. J.
Hitachi , Ltd.
The Kansai Electric Power Co. Inc.
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