摘要
针对传统单相PWM整流器直接功率控制(Direct Power Control,DPC)存在系统动态响应慢、抗干扰能力差、频率不固定等问题,采用了一种电容储能的外环反馈控制和无差拍预测直接功率的内环控制方法。外环将电容储能作为反馈量,提高了系统动态响应速度和抗干扰能力。同时,内环采用自回归算法,解决了传统算法中延时补偿问题,简化了控制器设计。通过空间矢量调制算法(Space Vector Pulse Width Modulation,SVPWM)固定了开关频率。此外,该方法无需电压相位检测装置,降低了设计成本。最后对所提出的控制算法和传统电压外环直接功率控制分别进行了仿真分析,仿真结果验证了该算法的有效性。
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.
作者
胡晓雪
王海滨
郭筱瑛
张煜枫
刘中豪
曹太强
Hu Xiaoxue;Wang Haibin;Guo Xiaoying;Zhang Yufeng;Liu Zhonghao;Cao Taiqiang(School of Electrical Engineering and Electronic Information,Xihua University,Chengdu 610039,China;School of Information and Electric Engineering,Panzhihua University,Panzhihua 617000,China)
出处
《电子技术应用》
2018年第9期158-161,166,共5页
Application of Electronic Technique
基金
成都市科技惠民技术研发项目(2016-HM01-00010-SF)
省部级学科平台开放课题基金(szjj2017-015)
关键词
PWM
无差拍预测控制
直接功率控制
电容储能
空间矢量
PWM
deadbeat predictive control
direct power control
capacitor energy storage
space vector
