摘要
针对传统PI双闭环控制系统难以达到良好控制效果问题,研究了一种电压外环为前馈补偿加输出电压反馈控制,电流内环为滑模变结构的控制策略。该策略利用电压外环维持直流侧电压的稳定和控制整流器的功率流向,电流内环控制PWM整流器的交流侧输入电流跟踪输入正弦电压,实现能量的双向流动和单位功率因数运行。最后,在MATLAB/SIMULINK中进行仿真,结果验证了此控制策略的可行性和有效性。
The basic principle of the three - phase voltage - source PWM rectifier was analyzed and the mathematical model was established. Aiming at the problem that traditional double - loop PI control could hardly achieve favorable effect, a control strategy was studied with the outer control loop based on feed - forward compensation combining output voltage feed - back control and the current - loop based on sliding - mode control. The strategy applied voltage loop to keep the DC voltage stability and control the rectifier＇s power flow direction, and the current loop control AC current tracked the AC voltage＇s phase, realizing the reversible flow of energy and unity power factor operation. And the simulation results from MATLAB/SIMULINK verified the feasibility and effectiveness of the control strategy.
出处
《煤炭工程》
北大核心
2014年第3期112-114,共3页
Coal Engineering
关键词
三相可逆PWM整流器
前馈控制
滑模控制
three phase reversible PWM rectifier
feed- forward control
sliding- mode control
