摘要
主要介绍俄罗斯统一电力系统制定的1999年《6～1150 kV电网雷电和内过电压防护导则》关于《110～1150kV架空线路防雷保护》部分中新内容和新观点。即:①防雷保护计算中增加用第1脉冲和后续脉冲雷电流幅值和陡度参数。②架空线路绝缘子串中个数选择增加了《保证线路绝缘25年不检修运行周期,实施在绝缘子串中增加绝缘子个数》的条款。③架空线路允许雷击跳闸次数是依据线路断路器操作资源准则。④分析架空线路运行耐雷指标指出:(a)110～220kV架空线路雷击跳闸主要起因是反击闪络;(b)330 kV架空线路雷击跳闸主要起因是大致反击闪络和绕击闪络各一半;(c)500～750kV架空线路雷击跳闸主要起因是绕击闪络;(d)提高1150kV架空线路耐雷性是靠使用负保护角避雷线来保证;(e)提高架空线路不问断供电可靠性的后备措施是自动重合闸。但是,采用自动重合闸不应减少使用的防雷保护基本措施,因为接地短路会降低变电所设备资源。
This paper mainly introduces the up-to-date contents and new ideas in the section of 'the lightning protection of 110～1150 kV overhead transmission lines' of the 'lightning and internal overvoltage protection guides for 6～1150 kV networks' comiled by the Russian United Power Network in 1999. In analyzing the lightning withstanding level of transmission lines in operation, the paper concluded that 1. the main cause of lightning trip-out of 110～220 kV lines is due to back strike; 2. the main cause of trip-out of 330 kV lines is approximately half by back strike and half by shielding failure; 3. the main cause for those 500～750 kV lines is shielding failures.
出处
《电力设备》
2003年第2期23-26,共4页
Electrical Equipment
