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Relation of Influential Parameters to Back-Flashover on the Insulators in Transmission Tower


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DOI: https://doi.org/10.15866/iree.v10i2.4874

Abstract


This paper focuses on behavior of over-voltage across the cross arm and back-flashover on the insulators with different front times of lightning waveshape. The simulations and analysis are performed using Alternative Transients Program/Electromagnetic Transients Program (ATP/EMTP) to investigate both over-voltage across the cross arm and insulators. The scheme under investigations is a part of Thailand electricity transmission and distribution system. The standard of lightning voltage waveshape (1.2/50 μs) will be compared with the other lightning voltage waveshape front time (4/50 μs) in this paper. The results indicate that the front time of lightning waveshape plays an important role for the back-flashover voltage across insulator as well as the tower footing resistance and the lightning current.
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Keywords


Lightning; Transmission Tower; Lightning Surge; Back-flashover; Power Systems

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References


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