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首页> 外文期刊>Science, Measurement & Technology, IET >Inter-correlations between emitted lights and corresponding currents associated to different energy level spark discharges in mineral oil submitted to high-voltage direct current stresses
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Inter-correlations between emitted lights and corresponding currents associated to different energy level spark discharges in mineral oil submitted to high-voltage direct current stresses

机译：矿物油中受到高压直流应力作用的与发出的光和与不同能级火花放电相关的相应电流之间的相互关系

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摘要

The present work is devoted to the analysis of currents and emitted lights associated to electrical spark discharges in mineral oil in a point-plane electrode system under high-voltage direct current stress. A systematic survey has been led on currents and emitted lights that characterise both positive and negative events through large applied field levels. On the other hand, interrelationships have been established between the currents and their corresponding emitted lights for all types of discharges. A particular attention will be accorded to the inter-correlation function between the recorded currents and light emissions and between their corresponding fast Fourier transforms. In spite of the similar shapes, major differences have been found between the spectral behaviours between currents corresponding to low-energy level discharges and those corresponding to high-energy level ones. On the other hand, photonic signals are found to be more accurate and expressive than the recorded current ones to investigate the physicochemical processes involved in the degradation of the insulating properties of the oil. The total energies of all types of discharges are of comparable magnitudes for both polarities. Their derivatives, i.e. powers, dissipated along the propagation are more expressive of the nature of discharge.
机译：本工作致力于分析点平面电极系统在高压直流应力下矿物油中的电火花放电所产生的电流和发射光。已经对电流和发出的光进行了系统的调查，通过大量应用的电场水平来表征正事件和负事件。另一方面，对于所有类型的放电，已经在电流与它们相应的发射光之间建立了相互关系。将特别注意记录的电流和光发射之间以及它们对应的快速傅里叶变换之间的互相关函数。尽管形状相似，但在对应于低能级放电的电流与对应于高能级放电的电流之间的频谱行为之间发现了主要差异。另一方面，发现光子信号比记录的当前光子信号更准确和更具表达力，以研究与油的绝缘性能下降有关的物理化学过程。对于两种极性，所有类型放电的总能量都具有可比较的大小。它们的导数，即功率，随着传播而耗散，更能表示放电的性质。

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