This article presents an experimental confirmation of a constant DC-capacitor voltage-control (CDCVC)-based strategy for an active power-line conditioner (APLC) in three-phase four-wire distribution feeders (TPFWDFs). A calculation block of the fundamental-active current in the feeder currents is added to the previously proposed CDCVC-based strategy for the APLC in a laboratory-scale experimental model. The experimental results demonstrate that the DC component of the output value of a proportional-integral (PI) controller in the CDCVC block is reduced by the injected fundamental-active current in the feeder currents, which is calculated by the added fundamental-active current calculation block. The PI controller in the CDCVC block of the APLC calculates the fundamental-active current in the feeder currents.

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