Xiao Qianghui

Study on a Novel Single-stage PFC Based on Dual-MOSFET Forward Converter

This paper introduces a novel single-stage PFC converter circuit which is combined by a PFC stage and a Dual-MOSFET forward DC/DC converter into one stage with shared switch and controller. Under the same controller circuit, it has the function of Boost PFC and conforms to the Dual-MOSFET Forward topological structure, greatly simplifying the circuit structure. A prototype has been built to verify the effectiveness of the proposed circuit. This circuit improves the efficiency and power density of the converter.

A Novel Controller for Parallel Operation of Inverters Based on Active Disturbance Rejection Control Technique

In this paper, a novel high-precision control strategy for parallel operation of three-phase inverters is proposed. In this system, the instantaneous values of active power and current for each module are obtained first by a algorithm based on instantaneous values of output voltage and output current which are detected from each inverter. Then, adjust the output voltage phase and amplitude according to the difference of output active power and output reactive power between each inverter to achieve output current sharing. Moreover, instead of the conventional PI controller, Active Disturbance Rejection Controller is applied in the system in order to improve the control precision. Simulation and experiment result show effectiveness and advantages of the proposed parallel inverters control system.