三电平逆变器优化特定谐波消去调制策略研究

Research on Optimizing Selective Harmonic Elimination Pulse Width Modulation for Three-level Inverter

本文以三电平特定谐波消去技术为研究对象,深入研究波形合成原理、初值获取方法、开关角轨迹迭代求解策略等关键技术。进而提出一种SHEPWM优化方案及其算法实现,用于改善逆变器输出电压的总谐波畸变情况。最后,本文通过MATLAB数值仿真验证了所提优化方案的有效性和实用性。

This paper does research on the three-level selective harmonic elimination pulse width modulation strategy,and deeply analyzes the key technologies such as the principle of waveform synthesis,the method to obtain the initial value,the iterative steps of switching angle trajectory,and so on.Furthermore,an optimization method and corresponding algorithm are proposed to improve the harmonic performance of inverter’s output voltage.Finally,this paper verifies the effectiveness and practicality of the proposed strategy through MATLAB numerical simulation.