1000kV特高压变压器油流带电分析及抑制对策  

Analysis on Oil-flow Electrification Phenomenon in 1000 kV UHV Transformer and Restrain Measure

作　　者：李忠全 许鹏 

机构地区：[1]国网运行有限公司晋东南特高压管理处,长治046603

出　　处：《高电压技术》2010年第4期907-911,共5页High Voltage Engineering

基　　金：国家自然科学基金(50407010);国家电网公司科技项目(SGTGY[2007]605)~~

摘　　要：油流带电是威胁大型变压器安全运行的重要因素之一。特高压变压器制造工艺更为复杂,运行条件更为苛刻,为确保其运行可靠性,需要采取有效措施抑制油流带电造成的危害,同时最大程度地减少热效应对绝缘的影响,延长变压器的使用寿命。为此结合国内外大型变压器的油流带电现象的研究成果,介绍了油流带电现象产生机理、影响因素,并针对特高压变压器特点进行分析,提出了特高压变压器油流带电抑制措施。研究表明,降低油速和改善绝缘(特别是油道)以及冷却方式设计是减少油流带电问题的最重要措施。此外,需要加强油务监督工作来监测变压器的油流带电问题。To ensure the operation reliability of power transformer,restraining oil-flow electrification phenomenon form transformers are demanded,meanwhile,the thermal impair should be limited as much as possible.Based on the research findings about oil flow electrification phenomenon in domestic and international large scale transformers,the production mechanism,the influential factors about oil flow electrification phenomenon were introduced,and the restraining measures were summarized.Research results show that the most important measures to mitigate the extent of oil-flow electrification are decreasing oil speed and improving the design of insulation structure,especially the structure of oil lines. In addition,strengthen oil supervision and management can also decrease the trend of oil-low electrification.

关 键 词：油流带电 特高压变压器 油速 绝缘 抑制对策 油务监督 

分 类 号：TM855[电气工程—高电压与绝缘技术]