摘要
输电线路的雷害事故不仅会造成危险的雷电过电压,还可能扰乱电力供应。推荐采用有选择地加装线路避雷器的做法来减少雷电引起的绝缘闪络。以一条110kV传输线路为例,说明制定线路避雷器安装方案的原则:首先区分线路绝缘子闪络是由反击还是绕击引起的;线路避雷器的安装主要以保护易遭受雷击的个别杆塔为目的,除此之外,应兼顾整条线路耐雷水平的提高。
The lightning strokes on transmission lines not only cause dangerous overvoltages but also disturb the power supply.To reduce the probability of occurrence of insulation flashover caused by lightning,a selective installation of transmission line surge arresters is recommended. With an example of a 110kV transmission line,some principles for installation of surge arresters are described.At first,whether shielding failures or backflashovers causing the line insultor flashover should be ascertained.Then,the main objective of installation of surge arresters is to afford protection for towers liable to lightning stroke and besides,the improvement of the lightning withstand level should be considered.
出处
《电瓷避雷器》
CAS
北大核心
2004年第3期32-35,共4页
Insulators and Surge Arresters
关键词
线路避雷器
反击
绕击
耐雷水平
transmission line surge arrester
backflashover
shielding failure
lightning withstand level
