T型三电平逆变器电驱动系统建模方法

摘要

There are more areas in space vector diagram of three-level inverter than two-level inverter. Therefore the control algorithm will be very complex. The modeling method based on Simulink is not conducive for rapidly preparing,modifying and transplanting of control algorithm. A new method based on Simulink and S- function is proposed. The working principle of each module of the electric drive system is analyzed. The model is established by using Simulink or S- function according to the characteristics of different modules of the three-level speed regulating system.Finaly,all modules are connected to simulate.The simulation results verify the accuracy of the proposed modeling method.%与两电平逆变器相比,三电平逆变器空间矢量图分区数量大大增加,因此,控制算法的复杂性也大大增加,基于Simulink的建模方法不利于控制算法的快速编写、修改和移植.提出一种基于Simulink和S- 函数的复合建模方法,分析了三电平电驱动系统各个模块的原理,针对不同模块的特点,采用Simulink或者S- 函数方法建立MATLAB模型,最后将所有模块连接起来进行仿真,仿真结果验证了所提建模方法的准确性.