PWM整流器在高压直流供电系统中的应用研究

Study of PWM Rectifier for HVDC System

介绍了基于相移变压器的双桥整流器的拓扑结构。运用傅里叶级数推导出一种双波段SHE-PWM的数学模型。并通过运算及实验结果证明了此调制方法对双波段式SHE-PWM的优良性能。此方法能有效消除谐波,减小电网污染,具有较高的实用价值。

This paper introduces a topological structure based on a dual-bridge rectifier with a phase shifting transform- er. Deduce the mathematic model of SHE-PWM via its principle analysis by Fourier series. The results of experiment in- vestigation prove that the topology and modulation method takes on an applicable value with little pollution to power grid. This method can effectively eliminate harmonic, reduce the power grid pollution, has high practical value.