Experimental Study on Corona Characteristics of Ball-Plate Electrode under High Humidity

Liang Xie, Yunxiang Cui, Hongjian Luo, G. Hua, Yunpeng Liu, Song Gao
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引用次数: 2

Abstract

In order to deeply study the corona problem of power fittings in high-humidity areas, an artificial humidity climate chamber was designed to conduct corona experiments on the ball-plate electrode under high humidity. During the experiments, the photon number of the ball electrode with different humidity and voltage was recorded by the ultraviolet imager. The corona initiation voltage experiments at relative humidity of 50%, 60%, 70%, 80%, 90% and 97% are conducted respectively. Under the high humidity condition of 97% with the condensing state, the corona initiation voltage experiment also was taken to compare with non-condensing state. Finally, the influence of each stage of the dewdrop development process on the electric field is analyzed through electric field simulation. The experimental results show that as the humidity gradually increases from 50% to 97%, the ball electrode’s corona initiation voltage drops from 97.5kV to 48kV decreasing of 50.7%. When the humidity is 97%, the corona initiation voltage of the ball electrode with condensation is 29.6% lower than that without condensation. Under the same voltage, the number of photons at the moment of the dew drop is the largest. In the electric field simulation analysis, as the accumulation degree of the dew drop increases, the distortion of the electric field increases, the electric field distortion is the most serious when the dew drops is consistent with the maximum number of photons in the experiment.
高湿条件下球板电极电晕特性的实验研究
为了深入研究高湿地区电力配件的电晕问题,设计了人工湿度气候室,对球板电极进行高湿条件下的电晕实验。实验过程中,用紫外成像仪记录了不同湿度和电压条件下球电极的光子数。分别进行了相对湿度为50%、60%、70%、80%、90%和97%的电晕起爆电压实验。在97%的高湿条件下,进行了冷凝状态下与非冷凝状态下电晕起始电压的对比实验。最后,通过电场仿真分析了露珠发育过程中各个阶段对电场的影响。实验结果表明,随着湿度从50%逐渐增加到97%,球电极的电晕起始电压从97.5kV下降到48kV,下降50.7%。当湿度为97%时,有冷凝的球电极的电晕起爆电压比无冷凝的低29.6%。在相同电压下,露珠瞬间的光子数最大。在电场模拟分析中,随着露珠积累程度的增加,电场畸变增大,当露珠与实验中最大光子数一致时,电场畸变最为严重。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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