改进型三电平PWM整流器的仿真研究

Simulation Research on Ameliorated Three-level PWM Rectifiers

以中点钳位型三电平PWM整流器的基本拓扑结构为基础,建立PWM整流器的数学模型,分析三电平空间电压矢量调制的基本原理,提出了一种改进型前馈控制策略及简化SVPWM控制算法。进行基于MATLAB/Simulink控制系统仿真分析,仿真结果表明提出的前馈控制策略及简化SVPWM控制算法具有可行性,系统具有良好的动态性能和稳态性能。

In this paper, the model of three-level PWM rectifier is set up and the fundamental principle of three- level space vector pulse-width modulation is analyzed based on fundamental topological structure of three-level neutral point clamped PWM rectifier. An ameliorated feedforward control strategy and a simplified algorithm are proposed. The control system is simulated by using MATLAB/Simulink. The simulation results demonstrate that the proposed feedforward control strategy and the simplified algorithm are feasible, and the system has excellent performance both in steady and dynamic states.