Novel simple reactive power control with constant dc-capacitor voltage control for active load balancer on three-phase four-wire distribution feeders under distorted source voltage conditions

This paper addresses the compensation performance of the previously proposed reactive power control algorithm with the constant dc-capacitor voltage control for active load balancer (ALB) on three-phase four-wire distribution feeders under distorted source voltage conditions. The instantaneous power flows into the ALB is discussed in detail. This instantaneous power flows into the ALB show that the previously proposed reactive power control algorithm is applicable under the distorted source-voltage conditions. A computer simulation is implemented to confirm the reality of the previously proposed reactive power control algorithm with the constant dc-capacitor voltage control under the distorted source-voltage conditions. A prototype experimental model is constructed and tested. Simulation and experimental results demonstrate that sinusoidal and balanced source currents with the power factor of 0.9 are achieved on three-phase four-wire distribution feeders under the distorted source-voltage conditions.