Power system stabilizer

Details Power system stabilizer Power system stabilizer

1988-07-26

1990-10-30

Smith, Jr., David

Electricity: motive power systems

Positional servo systems

With stabilizing features

322 20, 322 58, G05B 602

Patent

active

049671294

ABSTRACT:
A power system stabilizer (PSS) to bring the constant in a phase lead-lag circuit of the PSS to an optimum value by having such procedures carried out in its phase lead-lag compensation circuit as to apply the ruler to lead the phase of the PSS when the period of the power fluctuation in each mode tends to decrease and to lag the phase of the PSS when conversely the period tends to increase by means of a fuzzy inference device to detect results of the periods weighted by the degrees of the tendency, to superpose the outputs obtained by application of the rule to obtain the center of gravity, and therewith finally to vary the constant in the amplification and phase lead-lag circuit of the PSS.

REFERENCES:
patent: 3673512 (1972-06-01), Walters
patent: 4080559 (1978-03-01), Wright et al.
patent: 4438386 (1984-03-01), Gyugyi
patent: 4642541 (1987-02-01), El-Sadi
patent: 4733156 (1988-03-01), Tanaka et al.
patent: 4741023 (1988-04-01), Lawson
Society of Electrical Cooperative Research, vol. 34, No. 5, pp. 223-226.

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