Title :
Medium voltage distribution systems lightning performance estimation
Author_Institution :
Fac. of Electr. Eng., Univ. of Belgrade, Yugoslavia
fDate :
7/1/2003 12:00:00 AM
Abstract :
The estimation method for the statistical approach to the number of distribution system insulation failures caused by direct and indirect lightning strikes based on the lightning limiting parameter method is proposed. The optimal computation parameters like computation time-step, the number of strike locations along and perpendicular to the overhead line, and the number of simulations with different lightning current wave-shapes are determined after sensitivity analyses. The reduction of the overhead line flashover rate due to the direct lightning strikes caused by screening effect of the nearby objects is presented.
Keywords :
flashover; insulation; lightning protection; overvoltage protection; power distribution lines; power overhead lines; sensitivity analysis; shielding; computation time-step; direct lightning strikes; distribution system insulation failures; indirect lightning strikes; induced overvoltage; lightning current wave-shapes; lightning limiting parameter method; lightning performance estimation; medium voltage distribution system; overhead line; overhead line flashover rate reduction; sensitivity analyses; shielding effect; statistical approach; strike locations; Cable insulation; Computational modeling; Conductors; Flashover; Lightning; Medium voltage; Phase estimation; Power transformer insulation; Substations; Surges;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2003.813860
