绝缘油介质中水分含量对其电气性能的影响  

Influence of Moisture Content on Electrical Properties of Insulating Oil

作　　者：阎雪梅[1] 韦晨[1] 赵婕[1] 谢华强[1] 

机构地区：[1]桂林电器科学研究院有限公司,广西桂林541004

出　　处：《绝缘材料》2016年第7期79-82,共4页Insulating Materials

摘　　要：通过对25#变压器油进行吸潮处理,分析不同微水含量对变压器油交流局部放电、体积电阻率、相对电容率、介质损耗因数、交流击穿电压的影响,探索合理有效控制油中水分含量的方法。结果表明:吸潮处理时,随着湿度的增大和温度的升高,微水含量随之增大,其电气性能随之降低。变压器油最佳的干燥处理条件为105℃下真空干燥96 h,该条件下可有效去除变压器油中的游离水分,处理后变压器油的各项电气性能可达到较理想状态。In order to explore a reasonable and effective treatment method of moisture control for trans-former oil, 25# transformer oil was used to absorb moisture in different humidity circumstance, and the influence of different moisture content on the AC partial discharge, volume resistivity, relative permittivity, dielectric dissipation factor, and AC breakdown voltage of the transformer oil was analyzed. The results show that with the increase of temperature and moisture, the dielectric property of the transformer oil decreases. The optimum treatment condition of transformer oil is drying for 96 h at 105 ~C in vacuum. Under this condition, the free moisture in the transformer oil can be effectively removed, and the dielectric property of the transformer oil is ideal.

关 键 词：绝缘油 微量水分 交流局部放电 体积电阻率 相对电容率 介质损耗因数 交流击穿电压 

分 类 号：TM215.4[一般工业技术—材料科学与工程] TM201.44[电气工程—电工理论与新技术]