Predictive Direct Control Strategy Based on Improved ASTW Power Given Model
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.
three-phase pulse width modulation(PWM)rectifiervoltage imbalancemodel predictive direct power controladaptive supertwist sliding mode controller
万方数据
维普
