Abstract
This paper proposes a new constant de-capacitor voltage control (CDCVC)-based reactive power control strategy for an active power-line conditioner (APLC) in three-phase four-wire distribution feeders. The newly proposed CDCVC-based reactive power control strategy uses only a CDCVC, which is always included in grid-connected inverters, APLCs, etc. The calculation blocks of the fundamental active, reactive and harmonic components on the load side are not required. Thus, the authors propose a simplified strategy for the source-side reactive power control with source-side harmonic current compensation. The instantaneous power flowing into the APLC shows that the newly proposed CDCVC-based reactive power control strategy of the APLC achieves balanced and sinusoidal source-currents with a controlled power factor (PF). Simulation results demonstrate that the balanced and sinusoidal source-currents with a PF of 0.90 are obtained with the newly proposed CDCVC-based reactive power control strategy.
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