Individual-phase reactive power control strategy with constant DC-capacitor voltage control for active load balancer on three-phase four-wire distribution feeders

This paper proposes an individual-phase reactive power control strategy for an active load balancer (ALB) in three-phase four-wire distribution systems. The authors offer the simplest method to control different amounts of individual-phase reactive power for each phase on three-phase four-wire distribution feeders. The basic principle of the proposed power factor adjustable reactive power control strategy is discussed in detail. Simulation and experimental results demonstrate that the amount of individual-phase reactive power can be controlled with the balanced active source-current conditions on three-phase four-wire distribution feeders with the proposed individual-phase reactive power control strategy.