This paper analyzes abnormal operation cases of transmission line arresters since their initial application in Guangdong power grid for lightning protection of transmission lines in 1997.

• 通过对发生的电网事故的分析,介绍了一些防止雷害的措施:加装线路避雷器,降低杆塔接地电阻,热备用断路器防雷等方面的内容。