VSC-MTDC Oriented High Reliable Permissive Pilot Protection

被引：0

作者：

Wei L. ^{[1
]}

Tong N. ^{[2
]}

Lin X. ^{[2
]}

Sui Q. ^{[2
]}

Chen L. ^{[2
]}

Hu X. ^{[1
]}

Jin N. ^{[2
]}

Li Z. ^{[2
]}

机构：

[1] Electric Engineering & Renewable Energy School, China Three Gorges University, Yichang, 443002, Hubei Province

[2] State Key Laboratory of Advanced Electromagnetic Engineering and Technology (Huazhong University of Science and Technology), Wuhan, 430074, Hubei Province

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷

基金：

中国博士后科学基金;

关键词：

Boundary component; Converter; DC grid; Pilot protection;

D O I：

10.13334/j.0258-8013.pcsee.190588

中图分类号：

学科分类号：

摘要：

VSC-MTDC is a new technology that can overcome the shortcomings of current DC transmission technologies. With the engineering application of DC circuit breaker, ultra-high-speed protection, which can quickly and accurately identify line faults, has become a research hotspot. However, the single-ended protection which is widely studied at present belongs to the type of boundary protection. It has some problems, such as low adaptability to primary structure of the system, inability to coordinate the reliability and the sensitivity, etc. The traditional pilot protection is limited by communication capacity and time delay, and it is difficult to be used as a type of main protection. In view of the above problems, based on the analysis of the complex refraction/reflection characteristics of the traveling wave after the DC grid fault, the refraction/reflection ratio was used to establish the protection criterion. The criterion can cover the whole line with high sensitivity. Considering the special topological structure such as loop network, a locking criterion based on the above ratio relationship was constructed to ensure the high reliability of the protection principle. According to the switch-off time of the converter, the suitable line length range to ensure the protection fast-tripping capability was obtained quantitatively. Finally, the proposed protection principle was analyzed and verified by simulation cases. © 2019 Chin. Soc. for Elec. Eng.

引用

页码：95 / 108

页数：13

共 23 条

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