Configuration Scheme of Transmission Line Protection for Flexible HVDC Grid

被引：0
|
作者：
Dong X. [1 ]
Tang L. [1 ]
Shi S. [1 ]
Qiu Y. [2 ]
Kong M. [2 ]
Pang H. [2 ]
机构：
[1] State Key Lab of Control and Simulation of Power Systems and Generation Equipments, Dept. of Electrical Engineering, Tsinghua University, Haidian District, Beijing
[2] Global Energy Internet Research Institute Co., Ltd., Changping District, Beijing
来源：
Dianwang Jishu/Power System Technology | 2018年 / 42卷 / 06期
关键词：
Current differential protection; DC grid; Flexible HVDC; Transmission line protection; Travelling wave protection;
D O I：
10.13335/j.1000-3673.pst.2017.3063
中图分类号：
学科分类号：
摘要：
Because of capacity limitation of DC circuit breaker, transmission line protection of flexible HVDC grid must have fast operation speed. Configuration scheme of the transmission line protection for flexible HVDC grid is proposed.Main protection for the transmission line adopts single-end quantities based protection principle to meet need for fast speed of protection. Decoupling method and fault pole selection, accompanied with identification of noise, lightning and other disturbances, are essential to ensure reliability of the protection. Backup protection for the transmission line adopts pilot protection with high sensitivity, including travelling wave differential protection and reactive power based directional protection, and coordinates with main protection in time sequence. During fault on DC side, backup protection should be faster than protection at AC side. Difference and similarity among the transmission line protections for flexible HVDC grid, traditional HVDC system and AC system are analyzed and summarized, providing important reference for HVDC grids in construction in China. © 2018, Power System Technology Press. All right reserved.
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页码：1752 / 1759
页数：7
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