This paper deals with the experimental investigation of creeping discharges propagating along a solid insulating surface immersed in mineral oil (MO) and palm kernel oil methyl esters (PKOME). The experimental results show that the radial density of the discharge has a lognormal signature for positive discharges. The medians of the average statistical ratios between the total and maximum branch lengths obtained in MO and PKOME are around 97%. According to the presented results, it can be conclude that PKOME is a very good candidate to substitute MO.

中文翻译：

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沿浸在植物油和矿物油中的绝缘表面传播的正蠕变放电的实验表征

本文涉及沿浸没在矿物油 (MO) 和棕榈仁油甲酯 (PKOME) 中的固体绝缘表面传播的蠕变放电的实验研究。实验结果表明，放电的径向密度具有正向放电的对数正态特征。在 MO 和 PKOME 中获得的总分支长度和最大分支长度之间的平均统计比率的中位数约为 97%。根据所呈现的结果，可以得出结论，PKOME 是替代 MO 的非常好的候选者。