Research on Fault Characteristic and Location Method for Internal Open Circuit Fault of Cascaded Power Electronic Transformer

被引：0
|
作者：
Han J. [1 ]
Zhang Z. [1 ]
Yin X. [1 ]
Ran Q. [1 ]
机构：
[1] State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2020年 / 40卷 / 19期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Fault characteristic; Fault location; Internal open circuit; Power electronic transformer (PET); Protection and fault-tolerant;
D O I：
10.13334/j.0258-8013.pcsee.200008
中图分类号：
学科分类号：
摘要：
Power electronic transformer (PET) has garnered extensive attention for its flexible electric energy conversion and power flow control functions. However, the failure rate of PET is relatively high due to the use of a large number of power electronic devices. In particular, there are many problems in PET open-circuit fault handling, such as various fault types, complex fault characteristics, and incomplete fault location methods, etc., which seriously affect the operating safety and power supply reliability. According to the features of topology and control strategy of PET, this paper summarized the types of internal open-circuit faults, and analyzed the fault characteristics of PET in different control modes and operating states for various open-circuit faults. Based on this, different types of fault location methods were proposed, and comprehensive simulation tests were carried out. The results show that the proposed location methods can realize fast and accurate location of PET open circuit, and can meet the application requirements of PET protection and fault-tolerant control. © 2020 Chin. Soc. for Elec. Eng.
引用
收藏
页码：6071 / 6084
页数：13
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