SELF-EXCITED REACTIVE POWER COMPENSATION DEVICE

摘要

A self-excited reactive power compensation device is provided with a capacitor (C) for smoothing alternating-current voltage, a self-excited converter (1) that is coupled to a power system (3) having multiple phases and includes a switching element in order to output reactive power to the power system (3) on the basis of electric power smoothed by the capacitor (C), and a control unit (10) for controlling the reactive power outputted from the self-excited converter (1) to the power system (3) by switching the switching element on the basis of the voltage of the power system (3) detected by a first voltage detector (4) and an electric current flowing between the power system (3) and the self-excited converter (1), which is detected by a current detector (5).  The control unit (10) controls a charger (51) to thereby perform charge control for charging the capacitor (C) in such a manner that the voltage between both ends of the capacitor (C) detected by a second voltage detector (9) is a first predetermined value or more.