有损大地上传输线HEMP响应的研究

doi:10.19595/j.cnki.1000-6753.tces.171586

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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 words： High-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
	Jiang Luhang
	Liu Qiang
	Zhou Haijing

Cite this article:

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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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.171586 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I21/4901

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