Power control system including power supply dc line and selected one of plural performing dc voltage feedback control

Abstract

A power control system capable of controlling a plurality of proportional charge/discharge controllers while suppressing the occurrence of mutual interference in voltage feedback control. The power control system is connected to a power supply line to which a plurality of proportional charge/discharge controllers and a load are connected. Each of the proportional charge/discharge controllers are connected to respective power supply sources including at least one or more power generation devices including renewable energy-utilizing power generation devices and commercial power sources. A capacitor is electrically connected to the power supply line so that the DC-converted potential difference with the load does not fluctuate. The system further includes a control unit that controls the plurality of proportional charge/discharge controllers and performs voltage feedback control to bring the voltage of the power supply line closer to a target voltage for only one specific controller of the plurality of proportional charge/discharge controllers.