Simulation of lightning current distribution in towers of ultra-high voltage transmission lines

被引：0

作者：

Li W. ^{[1
]}

Xiang C. ^{[1
]}

Wen X. ^{[1
]}

Dai M. ^{[2
]}

Li Z. ^{[2
]}

Duan C. ^{[3
]}

机构：

[1] School of Electrical Engineering, Wuhan University, Wuhan

[2] China Electric Power Research Institute, Wuhan

[3] Wuhan Power Supply Company, State Grid Hubei Electric Power Company, Wuhan

来源：

Gaodianya Jishu/High Voltage Engineering | 2016年 / 42卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Cat-head type tower; Lightning; Lightning current distribution; Method of moment; MOM; Transmission line; UHV; Ultra-high voltage;

D O I：

10.13336/j.1003-6520.hve.20160812036

中图分类号：

学科分类号：

摘要：

:In order to further study the distribution characteristics of the lightning current through ultra-high voltage (UHV) transmission line tower, this paper simulated the current distribution when lightning striking the UHV transmission line tower. Firstly, a simplified model of a tower with a two-layer structure is established. Its characteristic under lightning stroke is analyzed based on the method of moment (MOM). The validity of the calculation is verified by the measured results of test model. On this basis, the simulation model of the cat-head type tower of UHV transmission lines was established according to the actual parameters. Its current distribution is simulated for four different injected lighting current waveforms and three different lightning strike locations are taken into consideration. The simulation results show that the more gently the lightning current waveform is, the more currents flew to nearby towers through overhead ground wire, and vice versa. The rising of the wave front time makes current through the diagonal brace larger. Lightning striking point has significant effect on the current distribution around the lightning striking point and will change the direction of current flowing through certain conductors. However, as the distance between a conductor and a lightning striking point increases, the effect caused by the lightning striking point location becomes less obvious, and the lightning current distribution tends to be more uniform. Simulation results also indicate that the lightning current located at different part of the tower differs in phase angle, and the sum of amplitude is greater than amplitude of the lightning current injected. The research can contribute to further understanding of distribution characteristics of lightning current through UHV transmission line tower. Moreover, it can provide references for installation of monitor device of lightning current distribution. © 2016, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

引用

页码：2642 / 2650

页数：8

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