Research on Multiple Control Strategy for SPWM Inverter
YAN Wen-yu;YU Shao-juan;GUO Zhi-jian;School of Electronic Information Engineering,Taiyuan University of Science and Technology;
In order to solve the problems such as output voltage waveform distortion and power quality decline owing to nonlinear loads and deadtime etc.,the iterative learning control is applied to control inverters and a new inverter control scheme is proposed based on iterative learning control by combining with double closed-loop PI control.Closed-loop PI controller parameters is obtained with pole assignment technique. Double closed-loop PI control is adapted to increase the dynamic characteristics of the inverter,and the iterative learning control is used to improve inverter steady-state accuracy. The simulation results show that the control strategy can achieve high-dynamic response and perfect output voltage waveform.