基于热稳定性能的主变压器油纸电容式套管介质损耗异常诊断  

Abnormality Diagnosis on Dielectric Loss of Main Transformer Oilpaper Capacitance Casing Pipe Based on Heat Stability

作　　者：杨贤[1] 柯春俊[1] 

机构地区：[1]广东电网公司电力科学研究院,广东广州510080

出　　处：《广东电力》2014年第8期60-63,共4页Guangdong Electric Power

摘　　要：以一起500 kV主变压器油纸电容式套管介质损耗异常增长的故障诊断为例,介绍了基于热稳定性能的主变压器油纸电容式套管介质损耗异常诊断方法。通过热稳定性能试验,获取套管介质损耗随温度变化的规律;依据套管热稳定性能理论,诊断套管介损异常原因。该方法对于绝缘介质受潮缺陷诊断的有效性得到了验证。Taking one fault diagnosis on abnormal increase of dielectric loss of 500 kV main transformer oilpaper capacitance casing pipe as an example,this paper introduces a kind of abnormality diagnosis method for dielectric loss of the main trans-former oilpaper capacitance casing pipe based on heat stability. By testing for heat stability performance,law of dielectric loss with change of temperature was obtained and reason for abnormal dielectric loss was diagnosed according to heat stabili-ty theory. Effectiveness of this method for diagnosis on insulating medium affected with damp was verified.

关 键 词：油纸电容式套管 热稳定 介质损耗 介质损耗因数 诊断 

分 类 号：TM85[电气工程—高电压与绝缘技术]