Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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基于FDS法研究水分含量对特征频率处介质损耗的影响

来源:电工电气发布时间:2019-02-19 09:19浏览次数:682
基于FDS法研究水分含量对特征频率处介质损耗的影响
 
刘翔,张可迪,胡康
(国网湖北省电力有限公司孝感供电公司,湖北 孝感 432100)
 
    摘 要:为研究水分对油纸绝缘系统的影响,分别在30 ℃和60 ℃下对试验室制备的试品进行频域介电谱(FDS)测量,通过对所得试验结果进行分析,选取特征频率处的介质损耗和水分含量进行拟合,并获得相关的拟合关系。研究表明:水分含量和特征频率处的介质损耗呈指数函数关系,随着水分含量的增大介质损耗也增大,其增长速率也逐渐增大,且频率越小其增长速率越大;在同一特征频率处,温度越高介质损耗的增长速率越大。
    关键词:变压器;油纸绝缘;频域介电谱;水分含量;特征频率;介质损耗;温度
    中图分类号:TM403.3;TM855     文献标识码:B     文章编号:1007-3175(2019)02-0048-04
 
Effect of Moisture Content on Dielectric Loss at Characteristic Frequency Based on FDS Method
 
LIU Xiang, ZHANG Ke-di, HU Kang
(Xiaogan Electric Power Supply Company of State Grid Hubei Electric Power Co., Ltd, Xiaogan 432100, China)
 
    Abstract: To accurately assess the effect of moisture on the oil-paper insulation system of transformer, the influence of moisture was studied at 30 °C and 60 °C by FDS method respectively. Through the analysis of the obtained test results, the dielectric loss and moisture content at characteristic frequency were selected to carry out fitting and to obtain the relevant fitting relationship. The research results show that the moisture content and the dielectric loss at the characteristic frequency are exponentially related. With the increase of moisture content, the dielectric loss also increased, and its growth rate also increased, moreover, the smaller the frequency, the greater the growth rate. The rate growth of dielectric loss increases with the increase of temperature at the same characteristic frequency.
    Key words: transformer; oil paper insulation; frequency domain dielectric spectroscopy; moisture content; characteristic frequency; dielectric loss; temperature
 
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