Research on compound current quality compensated device

This paper proposed a main circuit topology of cascaded compound current quality compensated device. Compared to the conventional topology, it used double PWM converter technology. PWM rectifier provided a stable DC voltage for the device, implemented input power factor approximately 1 and also achieved decoupling control of DC voltage and output current. PWM inverter used harmonic and reactive compound compensation control strategy and adopted PI closed-loop feedback control of output current directly to ensure good current tracking result. Finally, a low-pressure experimental prototype was designed to verify the feasibility and effectiveness of this control strategy and main circuit topology.