三相四开关容错变换器调制模型预测控制策略  

Three-phase four-switch fault-tolerant converter modulation model predictive control strategy

作　　者：吕恒志[1] 张涛 章凯旋 何帅彪 金楠 LYU Hengzhi;ZHANG Tao;ZHANG Kaixuan;HE Shuaibiao;JIN Nan(Mechanical and Electrical Engineering,Pingdingshan Industrial College of Technology,Pingdingshan 467000,China;College of Electric and Information Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China)

机构地区：[1]平顶山工业职业技术学院,机电工程学院,河南平顶山467000 [2]郑州轻工业大学,电气信息工程学院,河南郑州450002

出　　处：《轻工学报》2019年第4期87-95,共9页Journal of Light Industry

基　　金：郑州轻工业大学研究生科技创新基金资助项目(2018034)

摘　　要：针对传统三相四开关TPFS容错变换器单矢量控制电流跟踪精度不够、易导致电流总谐波失真THD较大的问题,提出了一种TPFS容错变换器在αβ静止坐标系下调制模型预测控制策略.该策略基于TPFS容错变换器运行机理建立了αβ静止坐标系a相故障电流预测模型,将TPFS容错变换器4个电压矢量两两组合,用调制模型预测原理计算每个电压矢量的作用时间以减少计算量,每个控制周期选择并使用两个电压矢量以减小电流纹波.仿真和实验结果验证了该策略的可行性和有效性,TPFS容错变换器控制跟踪精度得到了改善,降低了电流谐波,保证了TPFS容错变换器的持续运行.Aimed at the problem that the single-vector control current tracking accuracy of three-phase four-switch(TPFS)converter was not enough,which will lead to the total harmonic distortion(THD),a TPFS fault-tolerant converter modulation model predictive control strategy was proposed inαβstationary coordinate system.This strategy established the current prediction model under a-phase fault inαβstationary coordinate system based on the operating mechanism of TPFS fault-tolerant converter.The four voltage vectors of TPFS fault-tolerant converter were combined with each other,and the action time of each voltage vector was calculated by the modulation model prediction principle to reduce the calculation amount.Two voltage vectors were selected and used in each control period to reduce the current ripple.Simulation and experimental results showed that the feasibility and effectiveness of the proposed strategy.The tracking accuracy of the TPFS fault-tolerant converter was improved,the current harmonics were reduced,and the TPFS fault-tolerant converter was guaranteed to continue to operate.

关 键 词：TPFS容错变换器 模型预测控制 总谐波失真 

分 类 号：TM712[电气工程—电力系统及自动化]