Research on fault characteristics and protection system of cascaded power electronic transformers

被引：2
|
作者：
Han, Jiexiang [1 ]
Zhang, Zhe [1 ]
Chen, Yongxin [2 ]
Yin, Xianggen [1 ]
Ran, Qisheng [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Peoples R China
[2] State Grid Hubei Elect Power Res Inst, Wuhan 430077, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS | 2022年 / 137卷
基金：
中国国家自然科学基金;
关键词：
Power electronic transformer; Internal fault; Fault characteristics; Protection system; SOLID-STATE TRANSFORMER; MODEL;
D O I：
10.1016/j.ijepes.2021.107854
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Power electronic transformers (PETs) play a pivotal role in AC/DC hybrid distribution networks. However, there are few studies on the protection of PET. The safety of PET is seriously threatened by various internal faults. In this paper, internal faults of PET are classified according to fault positions and fault forms. The characteristics and hazards of different types of internal faults are analyzed and compared with external faults. The impacts of grounding mode, control mode, power direction and load level are considered in fault analysis. Moreover, an integrated protection system is established for PET. The principle and criterion of each protection relay are proposed based on fault characteristics. The correctness and effectiveness of fault analysis results and protection principles are verified via simulation tests.
引用
收藏
页数：12
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