Pulse sequence development of surface discharge under negative ramping voltage

作者：Lu Fan, Minyu Zhou, Yalin Wang, Yifan Rui, Yifeng Yin · 发表于：2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) · 年份：2022 · DOI：10.1109/ichve53725.2022.9961599 · 被引用次数：3 · 研究领域：High voltage insulation and dielectric phenomena、Plasma Applications and Diagnostics、Aerosol Filtration and Electrostatic Precipitation

The Trichel pulse in negative corona discharge received widespread attention, while the current pulse in surface discharge was rarely mentioned. This paper took the needle-plate electrodes for surface discharge, and the epoxy sample was fixed on the electrodes. A negative ramping voltage with a rising rate of 200 V/min was applied to the needle electrode, both discharge current and light signal were measured. The current pulse and the light pulse appeared synchronously when discharging, and the discharge current amplitude kept a linear relationship with the light signal amplitude. The pulse sequence pattern changed with the applied voltage increased, and the turning voltage was around 8.6 kV. The increased voltage made it easier for the accumulated surface charge to reach the discharge threshold, and the pulse sequence showed lower amplitude and shorter intervals.