基于空间电压矢量的PWM整流器谐波特性分析

摘要

根据SVPWM工作原理的特点,在对PWM整流器数学模型的基础上,利用傅里叶级数得到了网侧电压电流的谐波解析式,并分析了整流器的网侧电压电流在系统不同参数设置下的谐波特性,指出了各次谐波的幅值以及谐波含量随调制参数改变的变化规律.通过仿真对该算法进行验证,给出了不同电感值条件下的网侧电流谐波频谱,仿真分析结果与计算结果吻合较好,证明了算法的准确性.%According to the principle of SVPWM and considering the characteristics of PWM Rectifier, this algorithm of harmonic analysis based on SVPWM is proposed. The algorithm gives the expression of phase voltage and phase circuit harmonics through Fourier analyzing principle. And analyzes harmonic characteristics of AC side voltage and current with different parameters, summarizes the changing principle of amplitude of each harmonic with the variation of modulation parameters. The algorithm is verified by simulation, inductance values are given under different network side of the current harmonic spectrum, simulation results agree well with the calculated results and it shows accuracy of the algorithm.