基于电网不平衡的三相Vienna整流器双闭环控制策略  

Double Closed-loop Control Strategy of Three-phase Vienna Rectifier Based on Unbalanced Grid

作　　者：冯兴田[1] 崔晓[1] 马文忠[1] 王世豪 张奎同 FENG Xingtian;CUI Xiao;MA Wenzhong;WANG Shihao;ZHANG Kuitong(College of New Energy,China University of Petroleum(East China),Qingdao 266580,Shandong Province,China;Yankuang Group Co.,Ltd.,Zoucheng 273500,Shandong Province,China)

机构地区：[1]中国石油大学(华东)新能源学院,山东省青岛市266580 [2]兖矿集团有限公司,山东省邹城市273500

出　　处：《电网技术》2021年第5期1976-1984,共9页Power System Technology

基　　金：国家自然科学基金(51977220);山东省自然科学基金(ZR2019MEE094)。

摘　　要：传统的有限集预测功率控制应用在Vienna整流器时,在电网不平衡条件下输入电流将产生大量的三次谐波,严重影响Vienna整流器的正常工作。提出了一种基于电网不平衡的三相Vienna整流器双闭环控制策略,内环采用新型有限集预测功率控制(new-finite control set-model predictive direct power control,N-FCS-MPDPC),外环采用线性自抗扰控制(linear auto disturbance rejection control,LADRC)。通过引入重新定义的无功功率,使得在电网不平衡时能够同时有效控制瞬时有功功率二次谐波和瞬时无功功率二次谐波,实现了Vienna整流器在电网不平衡条件下的正常工作。电压外环采用线性自抗扰控制,还可以克服PI控制存在的电压超调和动态响应慢的问题;同时,其在电网不平衡条件下也具有较好的鲁棒性和较快的跟踪性能。最后,在Simulink中搭建了三相Vienna整流器的仿真模型,对所提控制算法进行了验证。The traditional finite set predictive power control applied to a Vienna rectifier may generate a large amount of third harmonics under unbalanced grid conditions,which will seriously affect the normal operation of the Vienna rectifier.This paper proposes a double closed-loop control strategy of three-phase Vienna rectifier based on unbalanced grid:the inner loop has a new finite set predictive power control(N-FCS-MPDPC)and the external voltage loop uses a linear active disturbance rejection control(LADRC).By introducing a newly-defined reactive power,the normal operation of the Vienna rectifier under unbalanced grid conditions is achieved through controlling effectively the second harmonic of instantaneous active power and that of instantaneous reactive power under unbalanced grid conditions at the same time.The linear active disturbance rejection control is adopted for the voltage outer loop,which overcomes the overvoltage and slow dynamic response associated with PI control.This control has a better robustness and faster tracking performance under unbalanced grid conditions.The simulation model of a three-phase Vienna rectifier is built in Simulink to validate the proposed control algorithm.

关 键 词：VIENNA整流器 新型有限集预测功率控制 线性自抗扰控制 SVPWM 中点电位平衡 

分 类 号：TM464[电气工程—电器]