刘卫朋,崔晓锋,侯明宣,吴尚.基于混合无源控制的变换器并联研究[J].电测与仪表,2023,60(8):26-31. Liu Weipeng,Cui Xiaofeng,Hou Mingxuan,Wu Shang.Research on the parallel connection of converters based on hybrid Passivity-Based Control[J].Electrical Measurement & Instrumentation,2023,60(8):26-31.
基于混合无源控制的变换器并联研究
Research on the parallel connection of converters based on hybrid Passivity-Based Control
Due to the difference of the line impedance and the change of the load in the DC microgrid, the circulating current and the fluctuation of the DC bus voltage will be generated between the power units. In order to solve the above problems, this paper proposes a hybrid Passivity-Based Control strategy that combines Passivity-Based Control and PI control. On the basis of traditional Passivity-Based Control, an external voltage closed loop and line impedance compensation circuit are added. This method can not only track the interference quickly without static error, but also effectively suppress the circulating current between parallel converters caused by the difference in line impedance. The simulation shows that the hybrid Passivity-Based Control strategy has lower circulating current when the load changes than the traditional passive control, and keeps the DC bus voltage stable. Finally, the effectiveness of the control strategy is further verified by using the RT-LAB real-time simulation platform for hardware-in-the-loop testing.
