Study of Lightning Overvoltages in Valcor-Guanta II 230kV Overhead Transmission Line

摘要

A methodology to determine the outage rate by lightning strokes in overhead transmission lines, applicable to any configuration of overhead line and voltage level is shown; which comes influenced by two aspects: the first of them, the outage rate by direct strokes which correspond to shielding failures and back flashover, additionally it is showed in the surges by this type of strokes by using programs ATPDraw and PSCAD. The second aspect exposes Rusck formulae and the methodology of Voislav to determine the Maximum voltages induced in the line, although the IEC60071-2: 1997 establishes that these surges can despise for voltages of services superior to 72.5 kV. A particular case for the study is considered: the 230 kV transmission line Valcor -^sGuanta II, of PDVSA.