七电平MPUC逆变器滞环SVPWM容错控制方法  

Hysteresis SVPWM Fault-tolerant Control Method for Seven-level MPUC Inverter

作　　者：李国华[1] 韩颖 李丰 刘明[2] LI Guohua;HAN Ying;LI Feng;LIU Ming(Faculty of Electrical and Control Engineering,Liaoning Technical University,Huludao 125105;College of Mathematics and Computer,Chaoyang Teachers College,Chaoyang 122000)

机构地区：[1]辽宁工程技术大学电气与控制工程学院,葫芦岛125105 [2]朝阳师范高等专科学校数学计算机系,朝阳122000

出　　处：《电气工程学报》2023年第3期216-223,共8页Journal of Electrical Engineering

基　　金：国家自然科学基金(51307076);辽宁省自然科学基金(20180550268);辽宁工程技术大学学科创新团队(LNTU20TD-32)资助项目。

摘　　要：为了提高单相多电平MPUC逆变器的工作可靠性,提出一种电流跟踪型单相七电平MPUC逆变器滞环SVPWM容错控制方法。首先,分析功率开关器件开路故障对单相MPUC七电平逆变器电压矢量的影响。逆变器开路故障状态下,该方法利用冗余电压矢量的替代实现容错控制;优先选择位置重合的冗余电压矢量进行等效替代;如果没有重合非故障矢量,则选择位置和作用效果最接近的其他非故障矢量。在逆变器单管开路故障状态下,该方法可保证逆变器输出电流较准确地跟踪参考电流,不需要增加备用的硬件冗余单元,能够节约硬件成本,简化系统结构。仿真结果证明了该方法的有效性。In order to improve the reliability of single-phase MPUC multilevel inverter,a current tracking single-phase seven-level MPUC inverter hysteresis SVPWM fault-tolerant control method is proposed.Firstly,the influence of single switch open circuit fault on voltage vector of single-phase MPUC seven-level inverters is analyzed.When the inverter is in open circuit fault state,the fault-tolerant control is realized by replacing redundant voltage vectors;the redundant voltage vectors with overlapping positions are preferred for equivalent substitution;if no non-fault vectors are overlapped,the other nonfault vectors with the closest position and effect are selected.Under the condition of single switch open circuit fault,this proposed method can ensure that the output current of the inverter can accurately track the reference current.This proposed method does not need to add spare hardware redundancy unit,which can save the hardware cost and simplify the system structure.Simulation results show the effectiveness of the proposed method.

关 键 词：MPUC逆变器 电流跟踪 七电平 容错 电压矢量替代 

分 类 号：TM71[电气工程—电力系统及自动化]