摘要
针对基于电网换相换流器(line commutated converter,LCC)的高压直流输电线路,分析了直流线路保护的作用以及对于保护动作速度的要求,阐述了基于低频分量的行波保护、微分欠压保护、纵联差动保护等直流保护原理,从行波单端量保护、纵联方向保护、距离保护、边界保护、考虑线路分布电流的纵联差动保护等几个方面,总结了相关理论研究的进展情况。对今后的研究方向进行了展望,指出利用故障暂态信息构成的故障方向元件是今后的研究重点,并针对保护装置的独立化和保护原理的实用化提出了建议。
In terms of HVDC transmission lines based on line commutated converter(LCC),this paper analyzes effect of DC line protection and requirements for protection speed,and states DC protection principles of traveling wave protection,differential undervoltage protection and longitudinal differential protection.It also summarizes study progress of related theories in aspects of non-unit protection of traveling waves,longitudinal direction protection,distance protection,boundary protection and longitudinal differential protection considering line distributed current.Meanwhile,it speculates on future research direction and points out the research focus of utilizing the fault direction components.Finally,it proposes suggestions for independence of the protection device and functionization of protection principle.
作者
罗澍忻
董新洲
LUO Shuxin;DONG Xinzhou(Grid Planning Research Center,Guangdong Power Grid Co.,Ltd.,Guangzhou,Guangdong 510080,China;State Key Laboratory of Control and Simulation of Power System and Generation Equipment,Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)
出处
《广东电力》
2019年第12期121-129,共9页
Guangdong Electric Power
基金
国家重点研发计划项目(2016YFB0900600)
关键词
高压直流输电
线路保护
行波保护
暂态量保护
综述
HVDC transmission
line protection
traveling wave protection
transient protection
research review