输电线路故障行波保护综述

A summary of fault traveling wave protection for transmission lines

输电线路行波保护利用故障产生的行波快速识别故障,具有超高速动作性能,且不受电力系统振荡、过渡电阻、分布电容电流和电流互感器饱和等因素的影响,是理想的超特高压线路继电保护方式。文中首先回顾了行波保护的发展历程,从行波信号的提取、信号处理技术的发展和工程实践三方面总结了国内外的研究现状;其次介绍了主要行波保护的基本原理,分析了各类行波保护原理的优缺点,总结了相关理论研究的进展情况,并针对各类行波保护原理进行了横向比较及其适用场景分析;然后探讨了行波保护技术实用化需要解决的主要问题,并提出了相应的解决方案;最后展望了行波保护的发展趋势,为后续行波保护技术的研究提供参考。

Transmission line traveling wave protection uses traveling waves generated by faults to quickly identify faults,has ultra-high-speed action performance,and is not affected by factors such as power system oscillations,transition resistance,distributed capacitance current,and current transformer saturation. It is an ideal ultra-high voltage line relay protection method.Firstly,the development process of traveling wave protection is reviewed,and the domestic and foreign research status from three aspects of traveling wave signal extraction,signal processing technology development and engineering practice are summarized.Secondly,the basic principles of traveling wave protection are introduced and the advantages and disadvantages of various traveling wave protection principles are analyzed. The progress of related theoretical research is summarized,and a horizontal comparison and applicable scenarios for various traveling wave protection principles is conducted. Next,the main needs to be solved for the practical application of traveling wave protection technology problems are discussed and corresponding solutions are put forword. Finally,the development trend of traveling wave protection is prospected,which provides a reference for the subsequent research of traveling wave protection technology.