Control apparatus for a synchronous machine

Details Control apparatus for a synchronous machine Control apparatus for a synchronous machine

1980-04-08

1982-05-11

Smith, Jr., David

Electricity: single generator systems

Automatic control of generator or driving means

Power factor or phase relationships

322 22, 322 25, 322 28, 322 58, 361 20, H02H 706, H02P 900

Patent

active

043296378

ABSTRACT:
A shaft torsional oscillation signal of a rotatable torsional system including a rotor of a synchronous machine, at least one rotatable body and a shaft coupling the synchronous machine and the rotatable body, is detected. The shaft torsional oscillation signal with a specific frequency is made to advance the phase thereof by a stabilizing control device. The field voltage of the synchronous machine is so controlled that a sub-synchronous resonance (SSR) of the rotatable torsional system caused by the specific frequency is restrictedly controlled by the shaft torsional signal of the specific frequency phase-advanced.

REFERENCES:
patent: 2920263 (1960-01-01), Curtis
patent: 2981882 (1961-04-01), Rosenblatt
patent: 3477014 (1969-11-01), Blythe
patent: 3656048 (1972-04-01), Hauf
patent: 3671850 (1972-06-01), Mehnart et al.
patent: 3999115 (1976-12-01), South et al.
patent: 4080559 (1978-03-01), Wright et al.
Kotake et al., "An Analysis on the Suppression Effect of SSR by a Field Voltage Control", Paper 886 at National Meeting of DENKI GAKKAI, 4/4/79.
Itabashi et al., "Control of a Low Frequency Resonance Phenomenon in a Series Cap. Comp. Sys. by a Magnetic Excit. Ct.", Paper 1215, DENKI GAKKAI, 7/79.
El Serafi et al., "Control of Sub-Sync Res. Osc. by Multi-Loop Excitation Controller", Paper A79076-1 at IEEE PES., 2/4/79.

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