Parallelled Operation Control of Three-Level Rectifiers

With the widespread use of electric vehicles, many wind power station and photovoltaic power stations have been built. This paper takes two sets of 60kW AC/DC converters in parallel as an example of load power supply for electric vehicles, and the main circuit parameters are designed for the three-level rectifier. Based on the voltage and current double closed-loop control mode, the virtual impedance and bus voltage secondary recovery link are introduced to realize the reasonable distribution of load power between the two groups of rectifiers. Finally, the simulation results are verified in MATLAB/Simulink simulation software. The results show that the control scheme can realize power distribution among rectifiers while ensuring the stability of DC voltage.