电力变压器用油浸绝缘纸板性能测试研究  

Property Test of Oil-immersed Insulation Paperboard for Power Transformer

作　　者：张良县 吴东阳 帅远明 陈荣 杨春 ZHANG Liangxian;WU Dongyang;SHUAI Yuanming;CHEN Rong;YANG Chun(Xi’an XD Transformer Co.,Ltd.,Xi’an 710077,China;Liaoning Xinqi Electric Material Co.,Ltd.,Liaoning Liaoyang 111000,China)

机构地区：[1]西安西电变压器有限责任公司,西安710077 [2]辽宁兴启电工材料有限责任公司,辽宁辽阳111000

出　　处：《高压电器》2022年第4期87-93,共7页High Voltage Apparatus

基　　金：国家重点基础研究发展计划项目(2017YFB0308200)。

摘　　要：绝缘纸板是电力变压器中最主要的固体绝缘材料,纸板浸油后其性能会发生明显变化。文中对浸油前后纸板试样进行拉伸试验,分析浸油后纸板性能的变化趋势,得出浸油会使纸板的机械强度下降、韧性变弱,刚度增大;对纸板试样在浸油前后、干燥前后的聚合度进行对比测试,分析浸油和现有干燥工艺对纸板聚合度影响;采用宽带介电谱仪对油浸绝缘纸板的介电常数、损耗角正切值进行测试,得到了油浸纸板的介电参数随温度和频率的变化特性。文中的研究成果弥补了现有标准的不足,可为变压器设计、运维人员提供更好的参考。Insulation paperboard is the main solid insulation material in power transformers and its property will change significantly after oil immersion. In this paper,the tensile tests on the paperboard samples before and after oil immersion are performed to analyze the variation trend of the paperboard property after oil immersion. It is concluded that the mechanical strength of the paperboard would be decreased,the toughness would be weakened,and the stiffness would be increased by the oil immersion. The comparative tests on the degree of polymerization of paperboard before and after oil immersion is performed so to analyze the effect of oil immersion and existing drying process on the degree of polymerization of the paperboard. The variation characteristic of dielectric parameters of the oil immersed paper board with temperature and frequency is obtained by the test of dielectric constant and loss tangent of the oil immersed insulation paperboard with broadband dielectric spectrometer. The study results in this paper has made up for the shortcomings of the existing standards and can provide good reference for transformer designers and operators.

关 键 词：油浸绝缘纸板 机械强度 聚合度 介电参数 

分 类 号：TM855[电气工程—高电压与绝缘技术]