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Numerical analysis of the influence between large grounding grids and two-end grounded cables by the moment method coupled with circuit equations

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5 Author(s)
Bo Zhang ; Dept. of Electr. Eng., Tsinghua Univ., Beijing, China ; Xiang Cui ; Zhibin Zhao ; Jinliang He
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The influence between larger grounding grids and two-end grounded cables is a serious problem not only for the performance of the grounding grids but also for the safety and the normal operation of the cables. In this paper, a numerical method coupling the moment method with circuit equations is presented to analyze the performance of the grounding grid connected with two-end grounded coaxial-shielded cables in frequency domain. From the analyzed results by this method, the electromagnetic interference between the grounding grid and the two-end grounded coaxial-shielded cable is analyzed. Validity of the method is testified by comparing the results with those of experiments and with published ones. Both the method and the results are useful for designing safe grounding grid and for analyzing cable's electromagnetic compatibility problems.

Published in:

IEEE Transactions on Power Delivery  (Volume:20 ,  Issue: 2 )