《航空高压直流供电系统中三相Vienna整流器的控制策略研究》之三——电网不平衡时Vienna整流器的滑模控制策略和稳定工作条件  

A Sliding Mode Control Strategy and Stability Operating Conditions for Vienna Rectifier under Unbalanced Voltage Condition

作　　者：李颖晖[1,6] 吴辰 李勐 朱喜华[4] 刘聪[5] 刘远飞[1] 谢喜太 LI Yinghui;WU Chen;LI Meng;ZHU Xihua;LIU Cong;LIU Yuanfei;XIE Xitai(Aeronautics Engineering College, Air Force Engineering University, Xi’an 710038, China;Unit 95169 of the PLA of China, Nanning 530031, China;Technical Service Centre for Military Vocational Education, National University of Defense Technology, Changsha 410073, China;Teaching and Research Department of Unit 95795 of the People's Liberation Army of China, Guilin 541003, China;Aviation Maintenance NCO Academy, Air Force Engineering University, Xinyang 464000, China)

机构地区：[1]空军工程大学航天工程学院,西安710038 [2]中国人民解放军95169部队,南宁530031 [3]国防科技大学军事职业教育技术服务中心,长沙410073 [4]中国人民解放军95795部队,广西桂林541003 [5]空军工程大学航空机务士官学校,河南信阳464000 [6]西安交通大学

出　　处：《大电机技术》2019年第3期1-9,共9页Large Electric Machine and Hydraulic Turbine

基　　金：国家重点基础研究发展计划(973计划):大飞机结冰多重安全边界保护和操纵应对方法研究及验证(2015cb755805);国家自然科学基金面上项目:多因素耦合诱发飞机功能危险建模仿真在系统安全性设计中的应用研究(61374145)

摘　　要：针对电网不平衡的问题,提出了一种基于滑模控制的抑制有功功率二次谐波的策略。首先,通过公式分序法提取了交流侧电压、电流的正负序分量,并推导了电网不平衡时瞬时功率的计算方法;在此基础上,根据抑制有功功率二次谐波的要求,改进了电网平衡时的双闭环滑模控制策略,并根据空间矢量调制的特点和交流侧电流、参考电压的位置关系,确定了上述控制策略下Vienna整流器的稳定工作条件。仿真和实验结果表明,当电网不平衡度和正负序电压初相位满足稳定工作条件时,Vienna整流器的交流侧电流能够保持正弦化,且谐波含量较低。For the unbalanced voltage condition, this paper proposes a control strategy for suppressing the second harmonic of active power based on sliding mode method. Firstly, the positive and negative sequence components of voltage and current on the AC side are extracted by the formula division method, and the calculation method of the instantaneous power in unbalanced voltage condition is deduced. Then the double closed-loop sliding mode control strategy proposed in balanced voltage condition is improved to suppress the second harmonic of active power respectively, and the stability operating conditions of the Vienna rectifier using the above strategy is determined based on the characteristics of the space vector modulation and the position relationship between the AC side current and the reference voltage. Finally, the simulation and experimental results show that when the unbalance degree of the grid and the initial phase of positive and negative voltage meet the stability operating conditions, the AC side current of the Vienna rectifier can be kept sinusoidal and the total harmonic distortion is low.

关 键 词：VIENNA整流器 电网不平衡 滑模控制 负序分量 

分 类 号：TM461.4[电气工程—电器]