摘要
由于雷电活动在不同地区存在较大差异,用规程DL/T 620-1997推荐的雷电参数对输电线路绝缘的耐雷性能进行分析时,得出的结果往往与运行实际相差甚远。以广西110 kV竹防-竹石同塔双回输电线路为例,利用雷电定位系统统计的雷电参数和规程DL/T 620-1997推荐的雷电参数,对线路绝缘的耐雷性能分别进行计算分析,证明用雷电定位系统统计的雷电参数算出的线路雷击跳闸次数与实际更为吻合,并针对引起该线路频繁跳闸的原因,提出相应的防雷改造措施。
As the lightning activity has a great difference in different regions, when using the lightning parameter which recommended by DL/T 620-1997 to analyze transmission line＇s insulation lightning protection performance, the results may far from the actual performance. Take the Zhufang- Zhushi double-circuit transmission line＇s insulation of 110 kV for example, the lightning parameter counted by lightning location system and the lightning parameter recommended by DL / T 620-1997 will be both used to analyze and calculate the lightning protection performance respectively, prove the former is more reasonable by comparing with actual performance. The corresponding lightning protection methods are proposed for the cause of line frequent trip.
出处
《电瓷避雷器》
CAS
北大核心
2011年第6期31-35,共5页
Insulators and Surge Arresters
关键词
雷电定位系统
雷电参数
地闪密度
输电线路
防雷措施
lightning location system
lightning parameter
cloud-to-ground lightning flash density
transmission line
lightning protection
