基于ATP—EMTP的高海拔地区某110kV线路雷击故障分析
Analysis of Lightning Fault on a 110 kV Transmission Line in High Altitude Areas Based on ATP—EMTP
赵文华 1李秋阳 1杨韬辉 1蒋玲 1马志青 1马旭东 1董生成1
作者信息
- 1. 国网青海省电力公司电力科学研究院,青海 西宁 810008
- 折叠
摘要
某高海拔山区 110 kV线路在经受大幅值雷电流侵入时发生三相短路故障,经现场勘查确认故障杆塔及环境状况,结合雷电监测系统中记录的雷电流幅值等故障监测数据以及历史运行数据,对雷击故障原因及线路防雷水平进行综合分析和评估.运用ATP—EMTP仿真软件构建故障杆塔模型,逐步调整雷电流幅值计算反击耐雷水平,结果表明此次故障为大幅值雷电流反击导致.最后分别对改善接地电阻、提高绝缘水平、增设避雷器等防雷措施效果进行仿真分析.并结合线路运行实况,选择合理的防治措施,从而提高线路的防雷水平.
Abstract
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.
关键词
高海拔山区/输电线路/雷电反击/ATP—EMTPKey words
high—altitude mountainous areas/transmission lines/thunderbolt counterattack/ATP—EMTP引用本文复制引用
出版年
2024
NETL
NSTL
万方数据