南方电网技术2017，Vol.11Issue(8)：16-24,33,10.DOI:10.13648/j.cnki.issn1674-0629.2017.08.003
功率开关故障情况下MMC型电力电子变压器的故障穿越运行策略
Fault Ride-Through Strategy for MMC Based Power Electronic Transformer Considering Power Switches Failures
摘要
Abstract
The input stage, isolation stage and output stage of modular multilevel converter ( MMC) based power electronic transform-er contain a large number of IGBTs and freewheeling diodes.The circuit topologies and fault characteristics of IGBTs and freewheeling diodes under open-circuit and short-circuit faults are analyzed.According to the characteristics of each stage of power electronic trans-former, the corresponding redundancy methods are designed to help the system to achieve fault ride-through.The input stage adopts sub-module spinning reserve redundancy.The dual active bridge of isolation stage is improved to be used for the isolation of the single stage double active bridge by means of parallel half bridge module in the series capacitors, on this basis, spinning reserve redundancy is configured for the isolation stage.The output stage inverter adopts bridge leg redundancy.Finally, the effectiveness of the proposed fault ride-through strategy is verified though simulation.关键词
MMC型电力电子变压器/故障分析/故障穿越/仿真分析Key words
MMC based power electronic transformer/fault analysis/fault ride-through/simulation analysis分类
信息技术与安全科学引用本文复制引用
徐永海,周廷冬..功率开关故障情况下MMC型电力电子变压器的故障穿越运行策略[J].南方电网技术,2017,11(8):16-24,33,10.基金项目
北京市自然科学基金资助项目(3172036).Supported by the Natural Science Foundation of Bei-jing (3172036). （3172036）
