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| Transient Electromagnetic Response of Multiconductor Transmission Line in Electrical System |
| Xie Li, Lei Yinzhao |
| Beihang University Beijing 100191 China |
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Abstract Analysis of the transient electromagnetic response of the multiconductor transmission line in an electrical system excited by an electric dipole is fundamental to protection of power systems against electromagnetic interference. The current Baum-Liu-Tesche (BLT) equation in the complex frequency domain is divided into two parts representing the responses excited separately by the terminal voltages of the loads and the distributed voltage sources produced by the electric dipole, and the time-domain relation of the terminal voltage and current of the transmission line is derived by inverse Laplace transform. Furthermore, the initial conditions of the transmission line are converted to the distributed sources along the line, so the zero-input response produced by the initial state of the line can be analyzed. The derived time-domain relation of the terminal voltage and current of the line is verified by the results comparison with the numerical method. By an illustration of an AC-DC power system, it is shown that the method proposed in the paper can be used to efficiently calculate the electromagnetic coupling problem of an external electromagnetic field and the multiconductor transmission line in an electrical system.
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Received: 10 December 2009
Published: 04 March 2014
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2010, Vol. 25 
