REACTIVE POWER COMPENSATOR FOR ARC FURNACES

摘要

Reactive current compensating apparatus for a multiphase electric power circuit comprises separately variable reactive impedence elements coupled to the power circuit in multiphase relation through phase shifting means such as a tertiary transformer winding. When phase voltage supplied to the compensating impedance leads or lags the line-to-neutral voltage of the power circuit the compensating effect in respect to negative phase sequence line current components is enhanced as compared to direct conductive connection of compensating impedance to the power circuit.