Identification method of shielding failure and back striking for overhead transmission line

被引：0
作者：
Du, Lin [1 ]
Chen, Huan [1 ]
Chen, Shaoqing [2 ]
Luo, Tao [2 ]
Li, Jianming [2 ]
机构：
[1] State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing
[2] Electric Power Research Institute, State Grid Sichuan Electric Power Company, Chengdu
来源：
Gaodianya Jishu/High Voltage Engineering | 2014年 / 40卷 / 09期
关键词：
Back striking; Failure recognition; Insulator potential difference; Power transmission line; Shielding failure; Tower grounding current;
D O I：
10.13336/j.1003-6520.hve.2014.09.038
中图分类号：
学科分类号：
摘要：
In order to identify lightning stroke faults on power transmission lines accurately, after discussing the mechanism of back striking and shielding failure, we simulated and studied an 110 kV transmission line with multi-wave impedance tower model and a lightning simulation model established in ATP-EMTP. The results indicate that the direction of insulator voltage differs between shielding failure and back striking. When there is insulator flashover, the voltage of insulator decreases to zero, and after the transient process of lightning strike ends, the voltage of insulator on nearby towers decreases to zero as well. When there is back flashover, the direction of insulator voltage on nearby tower alters. Meanwhile, the tower current can characterize the polarity of lightning current. Based on these features, insulator voltage and tower current are introduced as the characteristic indexes, and their direction and effective values are used as the recognition parameters for lightning stroke identification.
引用
收藏
页码：2885 / 2893
页数：8
相关论文
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