FIELD: power engineering; input power factor and output voltage correction. SUBSTANCE: method involves controlling inverter of transformer-thyristor reactive-power compensator with stepless amplitude-phase control of booster voltage. At low peak values of booster voltage when device functions to regulate load voltage only, inverter is controlled according to 180 deg. algorithm and at high voltages requiring also compensation for load voltage deviations and for supply mains reactive power, use is made of 150 deg. control algorithm. Desired inverter control algorithm is selected either steplessly or in steps under subcritical conditions of continuous currents through voltage inverter using one of variables associated directly or indirectly with inverter current phase. Such control is proposed to be made using inverter input voltage. EFFECT: reduced percentage of higher-harmonic components in output voltage. 3 dwg
