电压不平衡下Vienna整流器的谐振滑模控制策略  

A Resonance Sliding Mode Control Strategy for Vienna Rectifier under Unbalanced Voltage Conditions

作　　者：周运红 张爱民[1] 张杭[2] 黄晶晶[3] 杨卫朋[1] 张蕾[4] ZHOU Yunhong;ZHANG Aimin;ZHANG Hang;HUANG Jingjing;YANG Weipeng;ZHANG Lei(Faculty of Electronic and Information Engineering,Xi’an Jiaotong University,Xi’an 710049,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;School of Automation and Information Engineering,Xi’an University of Technology,Xi’an 710048,China;School of Electronics and Information,Xi’an Polytechnic University,Xi’an 710048,China)

机构地区：[1]西安交通大学电子与信息学部,西安710049 [2]西安交通大学电气工程学院,西安710049 [3]西安理工大学自动化与信息工程学院,西安710048 [4]西安工程大学电子信息学院,西安710048

出　　处：《西安交通大学学报》2020年第4期76-84,共9页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(51607133)。

摘　　要：针对电网电压不平衡条件下,Vienna整流器存在的负序电流及有功功率纹波问题,提出一种谐振滑模控制策略。首先,利用三相电压电流推导了三相Vienna整流器的直接功率控制模型;然后,在电压不平衡条件下,分析了系统不同控制目标的二倍频纹波补偿量,并设计了谐振控制器以便快速有效地跟踪纹波;最后,应用滑模控制策略对功率环进行设计,并通过对Lyapunov方程的求解确定Vienna整流器输出电压控制量。在MATLAB/Simulink上搭建了Vienna整流器仿真平台,对所提的谐振滑模控制策略的有效性进行了验证。仿真结果表明,该策略提高了系统在电网不平衡条件下的稳定性及控制精度。与传统PI控制策略相比,在电网不平衡下,Vienna整流器交流侧负序电流被抑制到原有的35.7%,有功功率纹波减少了67%。A resonance and sliding mode method is proposed to solve the problem of negative sequence current and active power ripple in the Vienna rectifier under unbalanced grid voltage input conditions.Firstly,a direct power control model of the three-phase Vienna rectifier is derived by the three-phase voltage and current.Then,the double-frequency ripple compensation amount for different control targets of the system is analyzed under the condition of unbalanced voltage,and a resonance controller is designed to track the ripple quickly and effectively.Finally,a power loop is designed using the sliding mode control strategy,and the output voltage control amount of the Vienna rectifier is determined by solving the Lyapunov equation.A simulation platform of the three-phase Vienna rectifier is built in MATLAB/Simulink to verify the effectiveness of the proposed resonance sliding mode control strategy.Simulation results show that the proposed strategy improves the stability and control accuracy of the Vienna rectifier under unbalanced grid voltage input conditions.A comparison with the PI control strategy for different control targets under unbalanced grid conditions shows that the negative current of the Vienna rectifier is suppressed to 35.7%of the original value and the active power ripple reduces by 67%.

关 键 词：谐振滑模控制 二倍频 VIENNA整流器 电压不平衡 

分 类 号：TM46[电气工程—电器]