500kV变电站主变一次侧避雷器故障分析  

Fault Analysis on Main Transformer Primary Side Arrester in 500 kV Substation

作　　者：杨璐羽 李冠华[1] 钟雅风[1] 于在明[1] 

机构地区：[1]国网辽宁省电力有限公司电力科学研究院,辽宁沈阳110006

出　　处：《东北电力技术》2014年第4期34-36,共3页Northeast Electric Power Technology

摘　　要：对辽宁电网一起避雷器故障情况进行了分析,指出故障原因是由于避雷器下法兰没有通风排水口,当内部有积水时不能及时排除,导致下法兰密封盖板和防爆板锈蚀,防爆板长期浸泡水中受潮,避雷器内部电阻片柱及绝缘支撑杆受潮,造成避雷器故障,并提出了改进措施。Arrester fault conditions in the Liaoning grid are analyzed in this paper, pointing out that the fault is due to the lower flange of the arrester without ventilation outlet. The internal water can not be removed, resulting the corrosion of lower flange sealing cover plate and the explosion-proof plate. When explosion-proof plate immersed in water for a long time, arrester internal resistance and insulating support rod become damp, which causes fault of the arrester. So improvement measures are proposed.

关 键 词：避雷器 泄漏电流 防爆板 

分 类 号：TM862[电气工程—高电压与绝缘技术]