基于Maxwell-Wagner模型的含水绝缘油的介电性质分析  

Pesearch on Dielectric Spectroscopy of Aqueous Insulating Oil based on Maxwell-Wagner Model

作　　者：彭程[1] 孙军泽 韩旭[1] 钱江波[1] 钱江超 PENG Cheng;SUN Junze;HAN Xu;QIAN Jiangbo;QIAN Jiangchao(Hebei Province Key Laboratory of Low-Carbon High-Efficiency Power Generation Technology,North China Electric Power University,Baoding 071003,Hebei,China;Hebei Construction Group Installation Engineering Co.,Ltd.,Baoding 071052,Hebei,China)

机构地区：[1]华北电力大学河北省低碳高效发电技术重点实验室,河北保定071003 [2]河北建设集团安装工程有限公司,河北保定071052

出　　处：《能源研究与管理》2024年第2期49-53,60,共6页Energy Research and Management

基　　金：中国华能集团科技项目(HNKJ20-HF68)。

摘　　要：绝缘油的微水检测对保障电力变压器的安全运行具有重要意义,而含水绝缘油的介电性质分析能够为绝缘油的微水检测提供物性参考。将Maxwell-Wagner模型简化,得到混合介质复介电常数与离散相含量之间的关系式,基于Maxwell-Wagner模型探究了含水绝缘油在不同温度、不同微水体积分数下随电场频率变化的介电性质。结果表明:在0.5~20 GHz内,微水体积分数为0.0010%时,Maxwell-Wagner模型计算的含水绝缘油实部最大误差不超过0.0514%,虚部最大误差不超过1.0500%,因此该模型适用于研究含水绝缘油的介电性质。复介电常数实部变化量随微水体积分数升高而增大,随电场频率增加而变小;虚部变化量随微水体积分数增加而增大,随电场频率增加,先增大后减小。实部及虚部变化量均随温度的增加而增大。研究表明,微水体积分数、温度及频率能够显著影响含水绝缘油的介电性质。The moisture detection of insulating oil is of great significance to ensure the safe operation of power transformer,and the dielectric property analysis of water-containing insulating oil can provide a reference for the moisture detection of insulating oil.The Maxwell-Wagner model is simplified to obtain the relationship between the complex dielectric constant of the mixed medium and the discrete phase content.Based on Maxwell-Wagner model,the dielectric law of water-containing insulation oil with the change of electric field frequency at different temperatures and different micro-water volume fraction is explored.The results show that:Within 0.5-20 GHz,the maximum error of the real part and the maximum error of the imaginary part of the complex dielectric constant of the water-containing insulating oil when the micro-water volume fractionis 0.0010%does not exceed 0.0514%and 1.0500%.Therefore,the model is suitable for studying the dielectric properties of the water-containing insulating oil.The real part of the complex dielectric constant increases with the increase of micro-water volume fraction,and decreases with the increase of electric field frequency.The changes of real and imaginary parts increased with the increase of temperature.The results show that the dielectric properties of water-containing insulating oil can be significantly affected by micro-water volume fraction,temperature and frequency.

关 键 词：变压器 绝缘油 微水 复介电常数 Maxwell-Wagner模型 

分 类 号：TM411[电气工程—电器]