日冕(行星地质学)
电压
电流(流体)
气隙(管道)
瞬态(计算机编程)
电晕放电
电场
电晕环
电极
辐射
高压
电气工程
光学
机械
物理
材料科学
工程类
计算机科学
操作系统
复合材料
天体生物学
量子力学
维纳斯
作者
Oscar Díaz,Liliana Arévalo
标识
DOI:10.1109/iclpandsipda54065.2021.9627335
摘要
Atmospheric air has been used during decades as main insulating media in the development of larger electric energy systems. The complexity of the many physical processes involved in the breakdown of air as insulating material, include different stages: the corona inception, streamer-to-leader transition, and leader propagation. These stages are accompanied with different levels of optical radiation and changes in the measured voltage and current across the air gap. During the first stages, low currents and transient events like the fast-current impulses occurring at the corona inception and at the streamer-to-leader transition, can be detected. In this paper we aim to analyze the results of a measurement campaign done at a high voltage laboratory while testing a sphere-to-plane electrode configuration with positive switching voltage impulses, recording voltage, current and fast/still camera images. The measured current impulses were compared with numerical simulations done for the estimation of electric charge produced at the leader-corona region, required to achieve the streamer-to-leader transition.
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