Modelling and measurement of field dependent resistivity of transformer oil

机译：变压器油的现场电阻率建模与测量

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This article studies the apparent resistivity of mineral oil as a function of electric DC stress using theoretical and experimental methods for three different oils. The experimental measurement of the apparent resistivity is done using a cell with two bare Rogowski like electrodes separated by a 2mm gap. The dc current is measured after one hour and the stress is varied in steps. For low DC stress the apparent resistivity rises with increasing voltage, leveling off and dropping slightly for higher voltages. The resistivity is modeled using the ion drift model with equilibrium resistivity measured using dielectric response as input. The charge dynamics and the corresponding resistivity is simulated and the results compared with the measured values. The main features seen in the measurements are captured in the simulation and there is a good overall agreement between the theoretical data and the experimental values.

机译：本文针对三种不同的油，使用理论和实验方法研究了矿物油的视在电阻率随直流电应力的变化情况。表观电阻率的实验测量是使用带有两个裸Rogowski状电极（间隔2mm的间隙）的电池进行的。一小时后测量直流电流，应力逐步变化。对于低直流应力，视在电阻率随电压的升高而升高，对于较高的电压，其趋于平稳并略有下降。使用离子漂移模型对电阻率进行建模，并使用介电响应作为输入来测量平衡电阻率。模拟了电荷动力学和相应的电阻率，并将结果与测量值进行了比较。测量中看到的主要特征已在模拟中捕获，并且理论数据和实验值之间具有良好的总体一致性。

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来源
《2014 IEEE 18th International Conference on Dielectric Liquids》|2014年|1-4|共4页
会议地点 Bled(SI)
作者
Lavesson Nils; Walfridsson Lars; Hjortstam Olof; Schiessling Joachim;
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作者单位

Power Technologies, ABB Corporate Research, V#x00E4;

ster#x00E5;

s, Sweden;

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会议组织
原文格式 PDF
正文语种 eng
中图分类
关键词
HVDC; direct-voltage stress; ion drift model; oil insulation; resistivity measurement;

机译：高压直流直流电压应力；离子漂移模型绝缘油；电阻率测量；;

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Modelling and measurement of field dependent resistivity of transformer oil

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