温度对油纸绝缘极化去极化电流的影响

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摘要温度是影响介电响应方法测量结果的重要因素之一。为解决温度对极化去极化电流的影响, 本文参照变压器绕组绝缘结构制作了油纸绝缘样品, 测量了油纸样品在不同温度下的极化去极化电流, 并提出了消除温度对极化去极化电流影响的新方法。结果表明：极化去极化电流均随温度升高而增大；极化去极化电流随测量时间逐渐减小并趋于稳定, 去极化电流的“拐点”出现的时间随温度升高而减小；不同温度下的极化去极化电流均可通过时间平移因子和幅值平移因子移动到一条主曲线, 消除了测试温度的影响；极化去极化电流的时间平移因子和幅值平移因子均满足Arrhenius方程, 且利用时间平移因子和幅值平移因子分别求得油纸绝缘样品的活化能相差不大, 约为61kJ/mol。

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	马志钦
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	王耀龙
	杨丽君

关键词 ：变压器, 油纸绝缘, 温度, 极化去极化电流, 时间平移因子, 幅值平移因子

Abstract：Temperature is one of the most crucial factors that influence the field measurement results of dielectric response method. For research the influence of temperature on polarization and depolarization current, oil paper samples are made according to the structure of transformer winding. Polarization and depolarization currents of oil paper samples are measured at different temperatures. A new method is put forward to eliminate the influence of temperature. Results show that both the polarization and depolarization current increase with temperature. Polarization and depolarization current decrease with time and become constant finally. An inflection point appears in the depolarization current and the time of inflection point shifts to lower with temperature increasing. A master curve can be formed by shifting the polarization and depolarization currents measured at different temperatures, and the temperature impact on the polarization and depolarization current can be solved by using the time-shift factor and amplitude-shift factor. Both the time-shift factor and amplitude-shift factor meet the Arrhenius equation, and the activation energy of oil paper samples solved by these two factors are almost the same, approximate 61kJ/mol.

Key words： Transformer oil-paper insulation temperature polarization and depolarization current time-shift factor amplitude-shift factor

收稿日期: 2011-10-27 出版日期: 2014-06-27

PACS:

TM835

基金资助:国家重点基础研究发展计划(973计划)(2009CB724505-1),云南省电力科学研究院和重庆市百名杰出科技领军人才培养计划资助项目

作者简介: 马志钦, 男, 1986年生, 助理工程师, 从事电气设备在线监测与故障诊断研究; 廖瑞金, 男, 1963年生, 教授, 博士生导师, 长江学者奖励计划特聘教授, 从事电气设备绝缘在线监测与故障诊断研究和高电压测试技术工作。

引用本文:

马志钦, 廖瑞金, 郝建, 赵小平, 王耀龙, 杨丽君. 温度对油纸绝缘极化去极化电流的影响[J]. 电工技术学报, 2014, 29(4): 290-297. Ma Zhiqin, Liao Ruijin, Hao Jian, Zhao Xiaoping, Wang Yaolong, Yang Lijun. Influence of Temperature on Polarization and Depolarization Current of Oil-Paper Insulation. Transactions of China Electrotechnical Society, 2014, 29(4): 290-297.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2014/V29/I4/290

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