Technical analysis of testing results for lightning current amplitude in 27 years on 220 kV Xin-Hang No.1 line
Dong Bao-hua · Electric Power · 2006
There were 716 lightning strokes recorded at 220 kV Xin-Hang No.1 line during the past 27 years from 1962 to 1988.According to these records,the causes of lightning flashover including shielding failure stroke and back-shielding failure stroke were analyzed and therefore shielding-failure stroke rate and lightning trip-out rate were obtained.The improvement anti-lightning stroke measure was proved by the variation of lightning trip-out rate and the tower-drainage of lightning current.The high-frequency-lightning stroke spots and susceptible-to-striking points were defined by the statistical results of the lightning stroke position of the line which can provide a reference for improving lightning protection measures focally and selectively.In addition,these data determined practically were carried out classification and statistics to derive the lightning natural parameters of accumulative probability distribution etc.for lightning current amplitude value of this line.