Analysis of Lightning Fault on a 110 kV Transmission Line in High Altitude Areas Based on ATP—EMTP
A 110 kV transmission line in a high—altitude mountainous area experienced a three—phase short circuit fault when subjected to a large value of lightning current intrusion.After on—site investigation and confirmation of the faulty tower and environmental conditions,combined with fault monitoring data such as lightning current amplitude recorded in the lightning monitoring system and historical operating data,a comprehensive analysis and evaluation of the causes of lightning faults and the lightning protection level of the line were conducted.Using ATP—EMTP simulation software to construct a faulty tower model,gradually adjusting the amplitude of lightning current to calculate the lightning withstand level,the results showed that the fault was caused by a large value of lightning current counterattack.Finally,simulation analysis was conducted on the effectiveness of lightning protection measures such as improving grounding resistance,increasing insulation level,and adding lightning arresters.And based on the actual operation of the line,select reasonable prevention and control measures to improve the lightning protection level of the line.
NETL
NSTL
万方数据
