Fault Tolerance and Overmodulation Algorithm for Three Level Neutral Point Clamped Inverters
作者单位：School of Electrical Engineering & AutomationHarbin Institute of Technology School of Electrical EngineeringDalian University of Technology
会议名称：《第36届中国控制会议》
主办单位：Dalian University of Technology;Systems Engineering Society of China (SESC);Technical Committee on Control Theory (TCCT), Chinese Association of Automation (CAA)
会议日期：2017年
学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0802[工学-机械工程] 0811[工学-控制科学与工程] 0701[理学-数学] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：supported by National Nature Science Foundation of China(51407023,51377013) China Postdoctoral Science Foundation(2013M540224)
关 键 词：Fault tolerance eight-switch three-phase inverter superposition principle overmodulation
摘 要：It has been a hot issue and also a difficulty to study the fault tolerance of multilevel *** topology changes to eight-switch three-phase inverter（ESTPI） if one leg of three-level NPC inverter is *** optimal modulation algorithm of ESTPI is proposed in this *** to the loss of one leg,the DC-link voltage utilization of ESTPI is reduced by ***,an overmodulation algorithm based on superposition principle is proposed to improve DC-link voltage utilization,without increasing DC-link *** proposed method is easier to implement compared with conventional overmodulation strategies for less *** proof and experimental results show that the proposed overmodulation algorithm is effective,and the DC-link voltage utilization can be increased maximally by 10.3%.