Static var generator compensating control circuit and method...

Details Static var generator compensating control circuit and method... Static var generator compensating control circuit and method...

G - Physics

05

F

323/10

G05F 1/44 (2006.01) H02J 3/18 (2006.01)

Patent

CA 1133584

47,436 STATIC VAR GENERATOR COMPENSATING CONTROL CIRCUIT AND METHOD FOR USING SAME ABSTRACT OF THE DISCLOSURE A control circuit for static a VAR generator measures load power during consecutive half cycles of the source voltage. This information together with load volt- age and load current information is used to determine the firing angles of the VAR generator thyristors for providing compensating current for keeping the source current in phase with the source voltage and for balancing the source cur- rents in a three-phase electrical system. The total compu- tation time for determining the firing angles extends into the half cycle in which correction is to be applied beyond a fixed minimum firing angle.

320633

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