System for predicting desynchronization of a synchronous machine

Details System for predicting desynchronization of a synchronous machine System for predicting desynchronization of a synchronous machine

1980-02-25

1982-09-21

Hickey, Robert J.

Electricity: single generator systems

Automatic control of generator or driving means

307 87, 322 19, 322 22, 322 99, H02P 914, G01R 3302

Patent

active

043509479

ABSTRACT:
Desynchronization of a synchronous machine is predicted by detecting a phenomenon of radical variation of the magnetic flux in the gap of a synchronous machine immediately before falling into an asynchronous state. For example, each functional value of the direct axis flux and the quadrature axis flux in the gap is detected for comparing the variation of each functional value with a predetermined reference level to predict desynchronization of the synchronous machine.

REFERENCES:
patent: 3855519 (1974-12-01), Waldman
patent: 3855529 (1974-12-01), Langweiler
patent: 3936722 (1976-02-01), Goto et al.
Handbook of Protective Relays, Fukuda, Ohm Co. Ltd., Oct. 31, 1967, pp. 181, 182.
Fuji Electric Journal, vol. 39, No. 2, pub. Feb. 10, 1966, pp. 147, 148.

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