This paper presents an investigation of the underlying mechanism behind the interface charge barrier between oil and oil immersed paper. Two types of oils and two types of cellulose papers are selected in the study. The interface charges of the samples are measured by the pulsed electro-acoustic (PEA) method and the zeta potentials of different oil-paper combinations are also measured. The results show that the amount of interface charge changes with the type of oils and papers, and is much larger than the Maxwell-Wagner-Sillars (MWS) polarization charge. The difference in the amount of interface charges cannot be attributed to the difference in the conductivity and permittivity of the materials. It is suggested that the barrier for charge transport across the interface, which is formed due to the electric double layer, should be taken into consideration to explain the interface charge behavior in oil-paper insulation.

中文翻译：

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油和油浸纸之间的界面电荷屏障

本文对油和油浸纸之间的界面电荷势垒背后的潜在机理进行了研究。在研究中选择了两种类型的油和两种类型的纤维素纸。样品的界面电荷通过脉冲电声（PEA）方法测量，并且还测量了不同油纸组合的zeta电位。结果表明，界面电荷的数量随油和纸张的类型而变化，并且比麦克斯韦-瓦格纳-西拉（MWS）极化电荷大得多。界面电荷量的差异不能归因于材料的电导率和介电常数的差异。建议由于双电层而形成的跨界面传输电荷的势垒，