Parallel Type Voltage Sag Compensator with Reduced Capacitor by Boost Type Power Factor Correction Rectifier

A new parallel type voltage sag compensator is proposed. The proposed system can reduce the necessary capacity of a storage capacitor for voltage sag compensation by boost type power factor correction rectifier getting charging energy from residual voltage of utilities as it compensates the load voltage. This paper shows principle and control system of the proposed circuit. Compensation performances are demonstrated by experiments.