摘要
研究了变压器油在不同注氧量、120℃加速热老化条件下,其流动带电度与介质损耗、体积电阻率、酸值以及界面张力等4种性能参数随老化时间的变化规律,并利用相关-回归分析方法研究了变压器油的流动带电度与这4种参数之间的相关性及拟合关系.研究结果表明:油中氧气会加剧变压器油的热老化;油的流动带电度与介质损耗及酸值呈显著正相关,与体积电阻率及界面张力呈显著负相关,并与这4种参数均满足指数回归模型.此外,还利用多元回归分析确定了油的流动带电度与介质损耗、体积电阻率、酸值及界面张力等参数的共同依存关系.以上研究结果为今后进一步探讨变压器油在热老化条件下性能参数的变化及预测提供了参考和分析依据.
The correlation and regression relationship of electrostatic charging tendency（ECT） with 4parameters,i.e.,dissipation factor,volume resistivity,acid number and interfacial tension of transformer oil are investigated,which was aged with different oxygen injection content at 120℃.It is concluded that the oxygen speeds up the thermal aging;the ECT has a positive correlation with the dissipation factor and acid number,while has a negative correlation with the volume resistivity and interfacial tension.In addition,the relationships of ECT with the four parameters obey exponential regression model,and the dependences are sought out with multiple regression analysis.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2010年第10期88-92,共5页
Journal of Xi'an Jiaotong University
基金
电力设备电气绝缘国家重点实验室中青年基础研究创新基金资助项目(EIPE10311)
关键词
变压器油
热老化
相关性
回归分析
transformer oil thermal aging correlation regression analysis
