Electricity: single generator systems – With physical starting and/or stopping of the generator
Patent
1977-06-15
1978-12-12
Hickey, Robert J.
Electricity: single generator systems
With physical starting and/or stopping of the generator
322 59, 322 73, H02P 306
Patent
active
041298187
ABSTRACT:
Disclosed is an apparatus for carrying out normal stop of a synchronous generator in an advantageous manner without use of a field breaker. The apparatus comprises a six-phase thyristor converter for controlling field excitation of the synchronous generator in dependence upon terminal voltage thereof, which converter exhibits not only a forward conversion function (power rectifier) but also backward conversion function (power inverter). When a generator operation stop command is produced, the operation of the converter in power rectifier mode is changed over to power inverter mode. During the inverter mode operation, when the terminal voltage of the synchronous generator becomes lower than a preset value, a pair of counter part thyristors among the thyristors constituting the converter are simultaneously fired to bring about a short-circuited state in the excitation circuit with all the firing pulses supplied to the other thyristors being suppressed, thereby to complete the stopping operation for the synchronous generator.
REFERENCES:
patent: 3314001 (1967-04-01), Brockman
patent: 3564391 (1971-02-01), Dinger
patent: 3605006 (1971-09-01), Nagae
patent: 3673488 (1972-06-01), Spiller
Goto Masuo
Isono Akira
Kai Takaaki
Momochi Yasushi
Hickey Robert J.
Hitachi , Ltd.
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