Compensator of reactive energy and balancing scheme of half-bus voltages associates

This reactive power compensator (10), adapted to be electrically connected to an AC electricity grid (12) comprises: - at least one bus (18) of DC input voltage, - at least one voltage inverter (20 ), the or each inverter (20) comprising switches (34), the or each inverter (20) further comprising a first capacitor (C1) having a first voltage (V) across its terminals and a second capacitor (C2) having a second voltage (V) at its terminals, - means (22) for controlling the switches (34), comprising means adapted calculation to generate a control target current, combining means of the control target current and current the output of the inverter (20), means of transmitting an own control signal to control the switches (34), and correcting means switches the control signals (34), the correction means being own to reduce the difference between the value of p irst voltage and that of the second voltage. The correction means are adapted to add a balancing current to the control target current, the balancing current being capable of correcting the control target current to reduce the difference between the values ​​of the first (V 1) and second ( V) voltages, the control target current is increased for the even harmonic of the mains frequency.