A Fast Fault-resistance Immune Protection Scheme Based on Impedance Angle for Multi-terminal VSC-HVDC

被引：0

作者：

Lan T. ^{[1
]}

Ren S. ^{[1
]}

Li Y. ^{[1
]}

Duan X. ^{[1
]}

机构：

[1] State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei Province

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2020年 / 40卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Fast protection scheme; Fault resistance; Impedance angle; Multi-terminal VSC-HVDC; Wavelet coherence transform;

D O I：

10.13334/j.0258-8013.pcsee.190573

中图分类号：

学科分类号：

摘要：

In multi-terminal VSC-HVDC, the fast protection scheme is generally with the dead zone problem under high-resistance fault, while the backup protection is insufficient in the operation speed, making the high-resistance fault hard to be detected in time accurately. In this paper, a fast fault-resistance immune fast protection scheme was developed. The similarities of the internal and external fault were analyzed, and the cause of the dead zone was revealed. Further, the differences in the impedance angle under internal high- resistance fault and external fault were investigated. According to the differences in the impedance angle, cross wavelet transform (CWT) was employed to design the criterion of the internal high-resistance fault, and fast protection scheme was proposed. Finally, the proposed protection scheme was validated in a four-terminal VSC-HVDC model. © 2020 Chin. Soc. for Elec. Eng.

引用

页码：3537 / 3547

页数：10

共 28 条

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