CHB逆变器阶梯调制的同伦算法研究

Homotopy Algorithm Research of the CHB Inverter with Staircase Modulation

介绍了多电平 CHB逆变器的几种调制方式以及阶梯调制的方法 ,并对此方法进行 SHE-PWM的研究 ,着重对 SHE-PWM非线性方程组求解的同伦算法进行了数学分析 ,并且对阶梯调制进行了同伦算法的算例研究 ,得出了同伦算法具有大范围收敛性以及很高的收敛速度的结论 ,最后对同伦算法的结果进行了仿真研究 ,证明其结果的正确性。

This paper introduces some modulation manners for multi-level CHB (Cascaded H- bridge) inverter, staircase modulation method is presented and used in SHE-PWM research,nonlinear SHE-PWM equations are emphasized and analyzed with homotopy algorithm from mathematical point.By making staircase modulation as an example t o engage in investigating with homotopy algorithm, a conclusion is drawn out tha t homotopy algorithm is a method with extended extent convergence and high speed of converging. At last, simulation is made with PSIM 6.0 to verify the precise of the solution of homotopy algorithm.