基于PDC的变压器油浸纸老化程度与水分含量评估方法研究

发布时间：2018-04-23 19:52

本文选题：油浸纸 + 老化程度　；参考：《高压电器》2017年11期

【摘要】：为将极化去极化电流法(PDC)应用于实际运行中变压器油纸绝缘的状态评估,笔者在实验室搭建了油纸绝缘PDC测试试验平台,测试了不同老化程度不同水分含量油浸纸样品的PDC特性曲线,并对测试结果进行对比分析。分析结果表明:在测试时间范围内,老化程度对油浸纸极化电流曲线的前段和中段以及去极化电流曲线的整个测试阶段产生影响;水分含量对油浸纸极化电流曲线的整个测试阶段以及去极化电流曲线中末段产生影响。提出以初始去极化电流idp1作为油浸纸聚合度的映射特征量,稳态极化电流id(电导电流)作为水分含量的映射特征量,分别拟合出两者之间的函数关系,以此提出一种适用于不同老化程度油浸纸水分含量的评估方法。
[Abstract]:In order to apply polarization depolarization current method to evaluate the condition of oil-paper insulation of transformer in practical operation, the PDC test platform of oil-paper insulation is set up in the laboratory. The PDC characteristic curves of oil impregnated paper samples with different aging degree and moisture content were measured and the test results were compared and analyzed. The results show that in the test time range, the aging degree has an effect on the front and middle sections of the oil-immersed paper polarization current curve and the whole testing stage of the depolarization current curve. The moisture content has an effect on the whole testing stage of the polarization current curve of oil impregnated paper and the end of the depolarization current curve. Using the initial depolarization current (idp1) as the mapping characteristic of the degree of polymerization of oil-impregnated paper and the steady-state polarization current (idd) as the mapping characteristic of water content, the functional relations between the two are fitted respectively. A method for evaluating the moisture content of oil impregnated paper with different aging degree is proposed.
【作者单位】：西南交通大学电气工程学院;
【基金】：中国电力科学研究院科技项目(GYB51201400860)~~
【分类号】：TM855

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