频域谱技术用于油浸式电力变压器绝缘状态现场诊断  

Application of Frequency Domain Spectroscopy to the Insulation Diagnosis of Oil-immersed Power Transformer on Site

作　　者：张致[1] 董明[2] 杨双锁[2] 姜惟[2] 张冠军[2] 严璋[2] 

机构地区：[1]湖北省电力试验研究院,武汉430077 [2]西安交通大学电力设备电气绝缘国家重点实验室,西安710049

出　　处：《高电压技术》2009年第7期1648-1653,共6页High Voltage Engineering

基　　金：国家高技术研究发展计划(863计划)(2007AA04Z411)~~

摘　　要：为了提高大型油浸式电力变压器的运行可靠性,提出了基于频域谱技术进行油浸式变压器绝缘状态及老化诊断的方法,利用该方法对国内某220kV变压器进行了测量,得到了其检修前后绝缘系统的介损频率特性曲线,并将频域谱测量方法与预防性试验数据进行了对比,验证了二者在变压器电容测量上的一致性。试验表明,频域谱方法可以反映变压器内部绝缘状态,估计固体绝缘中的含水量,为绝缘诊断提供参考信息;频域谱技术是一种无损试验方法,可作为现有绝缘诊断方法的重要补充,具有良好的应用前景。In order to improve the reliability of large oil-immersed power transformers, the frequency domain spectroscopy for oil-immersed transformer insulation condition and aging diagnosis was introduced, a domestic 220 kV transformer was measured using FDS methods, and the tan δf curves of the transformer insulation system before and after maintenance were obtained and compared. The consistency of frequency domain spectroscopy and preventive test on measuring capacitance Was verified by comparing the data acquired by both methods. The results show that the frequency domain spectroscopy can reflect the internal transformer insulation, estimate moisture content in solid insulation, and provide reference information for the insulation diagnosis. FDS is a non-destructive testing method that can be used as a supplementary technique for the existing diagnosis methods, having good application prospects.

关 键 词：油浸式变压器 频域谱 绝缘 老化 含水量 介电响应 

分 类 号：TM41[电气工程—电器]