Transactions of China Electrotechnical Society  2018, Vol. 33 Issue (21): 4901-4908    DOI: 10.19595/j.cnki.1000-6753.tces.171586
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The Research for the Transient Response of Overhead Transmission Line on Lossy Ground Excited by HEMP
Gong Yanfei1, Hao Jianhong1, Jiang Luhang1, Liu Qiang2, Zhou Haijing2
1. School of Electrical and Electronic Engineering North China Electric Power University Beijing 102206 China;
2. Institute of Applied Physics and Computational Mathematics Beijing 100094 China

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Abstract  An accurate model for the transient response of overhead transmission line on lossy ground against high-attitude nuclear electromagnetic pulse (HEMP) plane wave was established based on the second-order telegrapher’s equation of electric current. The time-domain finite-element formulas with respect to the electric current only are derived by using the Galerkin method and vector fitting method. The transmission line is divided into many segments, and in each segment the currents in the points are expressed by a linear combination of basis functions, so the residual formula is established in single segment. According the Kirchhoff’s voltage law in circuit analysis, the segments about entire line are synthesized in the finite element time-domain (FETD) matrix equation, which the currents along the line can be computed. In order to solve the voltages along the line, the second time-domain telegrapher’s equation is dealt with spatial and time discretization, so the voltages can be computed by means of the currents gained and previous voltages. Comparison with the results from the method of finite difference time-domain (FDTD) has verified the high efficiency and accuracy of the FETD method, which can provide reference for the transient response of transmission line excited by HEMP.
Key wordsHigh-attitude nuclear electromagnetic pulse      transient response      transmission line      finite-element time-domain      telegrapher’s equation;     
Received: 22 November 2017      Published: 12 November 2018
PACS: TM13  
  TM15  
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Gong Yanfei
Hao Jianhong
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Liu Qiang
Zhou Haijing
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Gong Yanfei,Hao Jianhong,Jiang Luhang等. The Research for the Transient Response of Overhead Transmission Line on Lossy Ground Excited by HEMP[J]. Transactions of China Electrotechnical Society, 2018, 33(21): 4901-4908.
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