Study on a new kind of control method of single-phase rectifiers

• Main Authors: Hu Xiaoxue, Wang Haibin, Guo Xiaoying, Zhang Yufeng, Liu Zhonghao, Cao Taiqiang
• Format: Article
• Language: zho
• Published: National Computer System Engineering Research Institute of China 2018-09-01
• Series: Dianzi Jishu Yingyong
• Subjects: PWM; deadbeat predictive control; direct power control; capacitor energy storage; space vector
• Online Access: http://www.chinaaet.com/article/3000091360

According to these drawbacks of traditional direct power control(DPC) in single-phase PWM rectifiers such as slow dynamic response,poor anti-interference ability and variable switching frequency, an algorithm based on outer loop adopting the feedback of capacitor energy storage and internal loop with deadbeat predictive direct power control is further given.This algorithm improves the speed of dynamic response and the ability of anti-interference with the outer loop control method based on the feedback variable of capacitor energy storage and load power feed forward. Meanwhile,the auto-regressive algorithm simplifies the controller design, and addresses the issue of delay compensation in traditional control. Combined with the space vector modulation(SVPWM) the system′s switch frequency is fixed. Furthermore, it reduces the design costs without voltage′s phase detector. Finally, the proposed control method and traditional DPC method were compared in computer simulation respectively , and the simulation result verified the validity of the proposed control method.