Circuit arrangement for damping power oscillations of synchronou

Details Circuit arrangement for damping power oscillations of synchronou Circuit arrangement for damping power oscillations of synchronou

1981-07-10

1983-10-25

Hickey, R. J.

Electricity: single generator systems

Automatic control of generator or driving means

Power factor or phase relationships

322 24, 322 32, 322 58, 361 20, H02P 910

Patent

active

044121717

ABSTRACT:
The input signal corresponding to the respective frequency or power variation is supplied both to the inputs of the discrete filters and to angle measuring devices assigned to them, of which only the tuned filter in conjunction with its angle measuring device actuates a switch which sends the filter output via angle rotating and matching elements to a MAX selector element, from which the supplementary damping signal for the excitation is tapped. For low oscillation frequencies a low-press filter is provided which, via mean value formers and time delay multivibrator stages, permits a regulator signal to become operative for the excitation, delayed or undelayed, when certain limit values are exceeded.

REFERENCES:
patent: 3465235 (1969-09-01), Schleif et al.
patent: 3477014 (1969-11-01), Blythe
patent: 4080559 (1978-03-01), Wright et al.
patent: 4329637 (1982-05-01), Kotake et al.
patent: 4377780 (1983-03-01), Bjorklund

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