Electricity: single generator systems – Automatic control of generator or driving means – Antihunting or rate of change
Patent
1979-08-30
1982-04-20
Hickey, Robert J.
Electricity: single generator systems
Automatic control of generator or driving means
Antihunting or rate of change
322 22, 361 20, H02P 910
Patent
active
043261590
ABSTRACT:
Voltage, current and field voltage of a generator connected to an electric power system are sampled at a predetermined period for analog-digital conversion and then led to a digital computer. In addition to computation for AVR, the computer computes from its input the generator output power, and also monitors the occurrence of a fault, the removal of the fault and variation in the generator output in the system. After the occurrence of a fault, the field excitation of the generator is intensified until the generator output power reaches substantially a peak value, but after the peak value is substantially passed by, the excitation is conversely depressed to a value below the level which is present before the fault occurs. When the generator output power recovers the value which is present before the fault occurs, the computer returns to deliver the AVR output.
REFERENCES:
patent: 3477014 (1969-11-01), Bluthe
patent: 3652920 (1972-03-01), South et al.
patent: 3818317 (1974-06-01), Isono et al.
patent: 3956637 (1976-05-01), Aotsu et al.
Aotsu Hiroaki
Fukushima Mamoru
Inayama Tsutomu
Isono Akira
Hickey Robert J.
Hitachi , Ltd.
Hitachi Engineering Co. Ltd.
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