摘要
湘西山区雷电活动剧烈,线路耐雷水平又相对偏低,雷击跳闸率高。运行经验表明:设计时应考虑山坡对保护角的影响,同时加强接地网的改造;在多雷区段加装线路金属氧化物避雷器;35kV线路进行铁横担接地并布设接地网。以上措施可有效地提高线路耐雷水平。
The thunderstrokes in Xiangxi mountainous areas are intense,accordingly,the strip-out rate from thunderstroke is very high.From experience,we have several effective methods to improve the thunder-protection level of line.The effective measures for improving the thunderstroke resistance level are as follows,considering the influence of the protective angle of the hillside while designing;enhancing the reconstruction of the grounded network,installing additional zinc oxide surge arresters in thunderous areas;grounding the cross-arm on 35kV overhead line and installing the grounded network.
出处
《电瓷避雷器》
CAS
北大核心
2004年第5期43-45,共3页
Insulators and Surge Arresters
关键词
送电线路
跳闸率
雷害原因
防雷措施
overhead line
strip-out rate
cause of thunderstroke damages
precaution measure against thunderstroke
