摘要
介质响应技术是检测油纸绝缘含水量的一种无损诊断技术,该技术通过油纸绝缘的介质响应曲线判断其含水量。为推动该技术的发展和实际应用,以电介质理论为基础,对大型油纸绝缘电力变压器的介质响应特性开展了大量研究。结果表明,大型电力变压器介质响应曲线受频率、温度、含水量的影响具有较强的规律。提出了大型电力变压器油纸绝缘含水量的定性分析方法,并通过建立不同含水量、不同温度油浸纸板的复介电常数数据库及设备的X-Y模型,实现了大型电力变压器油纸绝缘含水量的定量计算,计算结果与实际基本相符。
The dielectric response technology is a nondestructive technology of moisture content diagnosis for oil-paper insulation by dielectric response curve.To promote the development and application for the dielectric response technology,the dielectric response characteristics of the actual large oil-paper insulation power transformer were studied on the basis of dielectric theory,and the test results show a strong regularity that frequency,temperature,and moisture content effect on the dielectric response curve of large power transformer.The qualitative analysis method of moisture content in oil-paper insulation for the large power transformer was proposed.The quantitative analysis method of moisture content in oil-paper insulation of the large power transformer was developed based on the equipment X-Y model and the complex permittivity database of oil impregnated pressboard under various moisture contents and temperatures,and the calculated values agree with the experimental data approximately.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2012年第33期133-140,186,共8页
Proceedings of the CSEE
关键词
大型电力变压器
油纸绝缘
含水量
介质响应
复介电常数
large power transformer
oil-paper insulation
moisture content
dielectric response
complex permittivity