摘要
高压输电线路跳闸主要是由雷击引起的。研究雷击电流波形能有效地提高判别雷击故障的准确性。且雷击产生的暂态信号在特定条件下可能对行波保护和暂态量保护产生不良影响,使其误动。针对这一情况,本文分别对雷击输电线路不同位置产生的电流行波进行详细的分析。并研究了雷击闪络与雷击未闪络的机理,发现雷击闪络产生的行波总体上呈现出单调变化,雷击未闪络时产生的行波在零轴上呈正负交替变化。针对这一发现提出了一种基于零序电流的输电线路行波保护雷击干扰识別方法。
The trip of HV transmission line is mainly caused by lightning strike.The study of lightning current waveform can effectively improve the accuracy of the fault identification.And the transient signals generated by lightning strike may have adverse effects on traveling wave protection and transient protection under certain conditions,leading to malfunction of the device.In this paper,the analysis of the current traveling waves generated by lightning strike transmission line is carried out in detail.And the mechanism of lightning failure with flashover and the failure without flashover are studied.It is found that lightning flashover of traveling wave on the whole present a monotonous change,and lightning failure without flashover of traveling wave on the zero shaft of plus or minus alternately.Based on this discovery,a new method is proposed to determine the lightning in failure with flashover and failure without flashover of high voltage transmission lines.
作者
纪思
李天权
杨桥伟
张瑀明
束洪春
JI Si;LI Tianquan;YANG Qiaowei;ZHANG Yuming;SU Hongcun(Chuxiong Power Supply Bureau,Chuxiong 650000,China;Electrical Power Engineering,Kunming University of Science and Technology,Kunming 650051,China)
出处
《电瓷避雷器》
CAS
北大核心
2019年第5期37-44,49,共9页
Insulators and Surge Arresters
关键词
输电线路
雷击
行波
transmission line
lightning strike
travelling wave
作者简介
纪思(1985—),男,硕士,研究方向为电力系统保护与调度。
