When pulse width modulation(PWM)rectifiers adopt model predictive power control(MPDPC)under generators operating in the non-ideal voltage conditions,the active power is generally given by multiplying the voltage proportional integral controller(PI)outer loop with the DC side voltage.However,the PI controller has problems such as large output voltage fluctuations,slow response speed,and poor anti-interference performance when the load changes suddenly.Therefore,an improved adaptive super spiral algorithm(ASTW)based MPDPC power given control strategy is proposed.A nonlinear power control law based on the super spiral algorithm is designed by modeling the DC side power of PWM rectifiers.At the same time,to solve the problems of gain mismatch and chatter suppression before and after load mutation,the adaptive law is optimized,and the stability is thoroughly analyzed and theoretically proved.Finally,a simulation model and an experimental platform are established,which show that the improved ASTW can suppress system chatter,reduce power fluctuations,improve the dynamic response speed of the system,and enhance its ability to resist load disturbances.
关键词
脉冲宽度调制(PWM)整流器/电压不平衡/模型预测直接功率控制/自适应超螺旋滑模控制器
Key words
three-phase pulse width modulation(PWM)rectifier/voltage imbalance/model predictive direct power control/adaptive supertwist sliding mode controller
维普
万方数据