Abstract
Abstract This paper describes transient performance of the 500 kV overhead transmission line (OHTL) during lightning occurrence using ATP-EMTP modeling. Induced voltages across the insulator strings are calculated. Various parameters that have direct effect on back flashover phenomenon such as the effect of lightning stroke magnitude, the striking distance, rise (front) and decay (tail) times of impulse lightning, tower footing ground system, and soil resistivity are discussed. Surge arresters are used in this work to overcome the back flashover. The performance of OHTL after connecting surge arrester has been studied at the instant of the lightning strokes occurrence.
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