Comparison of negative streamer development in synthetic ester and mineral oil in a point-sphere gap divided by a pressboard barrier

IF 1.9 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Electrostatics Pub Date : 2023-09-01 DOI:10.1016/j.elstat.2023.103839

Pawel Rozga, Filip Stuchala, Bartlomiej Pasternak, Malgorzata Binek

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Abstract

This article presents the results of the studies on development of negative streamers in synthetic ester and mineral oil with electrode system using a pressboard barrier. The tests were performed at standard lightning impulse voltage in point-sphere electrode configuration as reference system and a 5 mm thick pressboard barrier placed in different locations between the point and the sphere. Introducing pressboard between the electrodes allowed to relate the observations to the real insulating systems where long oil gaps are divided on shorter by insulating barriers. It was done to show whether pressboard barrier changes the streamers behavior in the considered electrode gap distance what is important from the viewpoint of assessment of dielectric properties of alternative liquids versus mineral oils. The results showed that the pressboard barrier for both liquids tested prevents breakdown. In addition, the barrier causes reduction of the propagation velocity of the streamers in synthetic ester, which is benefit in relation to the results concerning free liquid gaps.

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合成酯和矿物油在由压板屏障分隔的点球间隙中负流光发展的比较

本文介绍了在合成酯和矿物油中利用压板屏障电极体系开发负流光的研究结果。测试在标准雷击电压下进行，以点球电极配置为参考系统，在点和球之间的不同位置放置5毫米厚的压板屏障。在电极之间引入压板，允许将观察结果与实际绝缘系统联系起来，其中长油隙被绝缘屏障分隔成较短的油隙。为了表明压板屏障是否改变了在考虑的电极间隙距离内的流光行为，从评估替代液体与矿物油的介电性能的观点来看，这是重要的。结果表明，两种测试液体的压板屏障可防止击穿。此外，屏障的存在还降低了流光在合成酯中的传播速度，这对自由液隙的研究结果是有利的。

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来源期刊

Journal of Electrostatics 工程技术-工程：电子与电气

CiteScore

4.00

自引率

11.10%

发文量

审稿时长

49 days

期刊介绍： The Journal of Electrostatics is the leading forum for publishing research findings that advance knowledge in the field of electrostatics. We invite submissions in the following areas: Electrostatic charge separation processes. Electrostatic manipulation of particles, droplets, and biological cells. Electrostatically driven or controlled fluid flow. Electrostatics in the gas phase.