G - Physics – 05 – F
Patent
G - Physics
05
F
323/20
G05F 1/70 (2006.01) G05F 1/12 (2006.01)
Patent
CA 1171459
47,479 VOLTAGE REGULATOR UTILIZING A STATIC VAR GENERATOR WITH HALF PERIOD AVERAGING AND SATURATING TYPE FIRING ANGLE CONTROL ABSTRACT OF THE DISCLOSURE A voltage regulator is taught for maintaining the terminal voltage of a three phase transmission line at a fixed reference value. The voltage regulator system utilizes the reactance of the transmission line in con- junction with reactive current from a VAR generator to compensate for the voltage effect of line current as it flows through the line reactance. The VAR generator is of the parallel capacitor-inductor type where the inductor is controlled by a thyristor switch. The con- duction of the thyristor is controlled by utilizing a control system which generates an error signal based on the half period average of line voltage. The error signal is converted to a signal which is proportional to flux linkages by an integrator and then compared with the integral of the voltage signal for determining the con- duction angle of the thyristor switches.
375940
Brennen Michael B.
Gyugyi Laszlo
Putman Thomas H.
Oldham And Company
Westinghouse Electric Corporation
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