三相逆变器双闭环控制系统仿真研究

Research on the Simulation of Three-Phase Inverter Double-Loop Control System

针对三相逆变器的控制系统,建立以SVPWM为调至策略的三相逆变器仿真模型,采用电压外环电流内环的双闭环控制策略,利用极点配置法设计PI控制器参数,推导传递函数。同时根据实际工程实践及逆变器的参数要求计算仿真模型输出端的滤波参数,最后在MATLAB/Simulink中搭建仿真模型。仿真结果显示,当负载及直流源发生故障时该系统具有良好的稳定性。

Mainly aims at the three-phase inverter control system,establishes a three-phase inverter simulation model with SVPWM as the tuning strategy,adopts the double closed-loop control strategy of voltage outer loop current inner loop,and designs the PI controller parameters by pole placement method.,deriving the transfer function.At the same time,according to the actual engineering practice and the parameters of the inverter,the filtering parameters at the output of the simulation model are calculated.Finally,the simulation model is built in MATLAB/Simulink.The simulation results show that the system has good stability when the load and DC source are faulty.