摘要
针对基于PI控制的PWM整流器鲁棒性差的问题,采用滑模控制理论设计电压外环,并在此基础上改进滑模控制器,改善了阻感参数变化时的电压输出波形。采用SVPWM控制策略,提高直流侧的电压利用率,并搭建MATLAB仿真模型,进行对比仿真实验。仿真结果表明:电压外环的滑模控制较传统PI控制有较强的鲁棒性,改进后的滑模控制器提高了阻感参数变化后系统的输出波形质量。
Aiming at the problem of poor robustness of PWM rectifier based on PI control,the sliding mode control theory is used to design the voltage outer loop,and on this basis,the sliding mode controller is improved to improve the voltage output waveform when the resistance and inductance parameters change.SVPWM control strategy is adopted to improve the utilization rate of DC voltage,and the simulation model of MATLAB is built to carry out comparative simulation experiments.The simulation results show that the sliding mode control of the external voltage loop is more robust than the traditional PI control.The improved sliding mode controller improves the output waveform quality of the system when the resistance parameters change.
作者
郭珍奇
GUO Zhen-qi(School of Electrical & Control Engineering,Heilongjiang University of Science & Technology,Harbin 150022,China)
出处
《通信电源技术》
2019年第3期52-54,共3页
Telecom Power Technology
