多电平逆变器特定谐波消除控制技术研究

Study of selected harmonics elimination control technology of multi-level inverter

为了深入分析多电平逆变器特定谐波消除脉宽调制技术的非线性求解法,建立了多种迭代算法求解模型,研究了模型求解特点,对传统数值算法在特定谐波消除求解时所体现的不足进行了分析和改进。以七电平逆变器为例,给出了各算法在不同调制波段下的求解情况,对各算法中一些参量的设置及消谐效果进行了比较。仿真结果证明了各算法求解结果的正确性。

In order to analyze nonlinear method of selected harmonics elimination PWM technique of multi-level inverter in-depth, several solution models of iterative algorithm were established, solution characteristics of these models were studied, and deficiency of the traditional numerical algorithm in the selected harmonics elimination solution was analyzed and improved. Taking a seven-level inverter as an example, the calculated results in different wavebands of each iterative algorithm were given, and algorithm parameters and elimination effect were compared. The simulation results confirm that solutions of these algorithms are correct.