Pilot Protection Based on Cosine Similarity for Transmission Line Connected to Wind Farms

被引：0

作者：

Jia K. ^{[1
]}

Zheng L. ^{[1
]}

Bi T. ^{[1
]}

Yang Z. ^{[1
]}

Li Y. ^{[2
]}

Han J. ^{[3
]}

机构：

[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Changping District, Beijing

[2] North China Branch of State Grid Corporation of China, Xicheng District, Beijing

[3] Electrical Power Research Institute of Inner Mongolia, Inner Mongolia Electric Power Co., Ltd., Hohhot, 010020, Inner Mongolia Autonomous Region

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 21期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Cosine similarity; Pilot protection; Wind farm;

D O I：

10.13334/j.0258-8013.pcsee.181540

中图分类号：

学科分类号：

摘要：

The generation principle of the renewable energy power plants, such as wind farms, is different from that of the synchronous machine, which causes the fault characteristics to be different between them. The decline of the traditional protection performance occurs, and even the traditional protections may maloperate or reject operation because of the distinct fault characteristics. In order to solve problems faced by power frequency protection, it was found that there are great differences between transient current waveform characteristics of various wind farms and synchronous machines. When the internal fault occurs in the transmission line, the difference of transient current waveform between both sides is huge, but the difference between the two sides is very small when the external fault occurs because a traversing current flows through the line. Using this difference of waveforms, a principle of pilot protection based on cosine similarity was proposed. The simulation results show that the proposed principle can reliably identify the internal faults and external faults, and it have the ability to withstand the transition resistance and noise. The proposed principle has good performance under the conventional sampling frequency. It is suitable for the existing wind farms. Field data verifies the effectiveness of the proposed protection and it is suitable to realize the industry application. © 2019 Chin. Soc. for Elec. Eng.

引用

页码：6263 / 6274

页数：11

共 37 条

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