Charge behavior in Palm Fatty Acid Ester Oil (PFAE) / Pressboard composite insulation system with charged oil flow

H. Saito, H. Okubo, H. Kojima, N. Hayakawa, K. Kato, K. Kawanishi, H. Koide
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引用次数: 4

Abstract

Palm Fatty Acid Ester Oil (PFAE) is expected as one of the substitutes for mineral oil of transformers owing to not only the high biodegradation but also the good insulation performance. In this paper, the electric field strength and its time transition in PFAE / Pressboard composite insulation system??under charged oil flow were directly measured by using Kerr electro-optic technique. We found that the electric field was generated by space charges in PFAE and was temporally changed with charge behavior. By comparison with high charging mineral oil, we clarified that the feature of the charge behavior in PFAE was similar to that in the mineral oil, but the behavior of electric field was different due to the variation of electric properties such as permittivity, relaxing time and charge density.
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棕榈脂肪酸酯油(PFAE) /纸板复合绝缘系统中带电油流的带电行为
棕榈脂肪酸酯油(PFAE)不仅生物降解性能好,而且绝缘性能好,有望成为变压器矿物油的替代品之一。本文研究了PFAE / Pressboard复合绝缘系统的电场强度及其时间跃迁。利用克尔电光技术直接测量带荷油流量。我们发现PFAE中的电场是由空间电荷产生的,并随电荷行为而发生时间变化。通过与高电荷矿物油的比较,我们发现PFAE中的电荷行为特征与矿物油中的相似,但由于介电常数、弛豫时间和电荷密度等电性质的变化,电场行为有所不同。
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