Probabilistic Evaluation of Lightning Performance of Overhead Transmission Lines with Considering Non-Vertical Strokes

چکیده مقاله

Thispaperrepresentsadevelopedprocedurefortheevaluationofflashoverratescausedby bothlightningverticalandnon-verticalstrokesontransmissionlines,usingaMonteCarlomethod.The maingoalofthispaperistoincreasetheaccuracyflashoverratesthroughtheaccuratemodellingof networkcomponents,suchasfootingimpedance,thetransmissiontowerandchainofinsulators,and alsosimulationoflightningnon-verticalstrokes.Modellingnetworkcomponents,statisticalparameters relatedtolightningandaproblem-solvingalgorithmaredescribed.Parametricstudiesusingthis procedurecanalsobeperformedtodeterminethesensitivityoftheflashoverratewithrespecttosome parametersofthereturnstrokeandthetransmissionline.SimulationresultsobtainedusingMATLABand theATP/EMTPshowthatconsideringthelightningnon-verticalinsteadofverticalstrokesleadstoabetter evaluationofthelightningperformanceoftransmissionlines