Experimental Study and 3-D Modeling of Positive Streamer Discharges Under the Effect of Humidity
Experimental Study and 3-D Modeling of Positive Streamer Discharges Under the Effect of Humidity
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DOI：
10.1109/tdei.2023.3276855
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发表时间：
2023-10
影响因子：
3.1
通讯作者：
She Chen;Tianwei Wang;Zezhong Wang;Ziyu Yan;Lipeng Zhong;Qiuqin Sun;Feng Wang
中科院分区：
文献类型：
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作者：
She Chen;Tianwei Wang;Zezhong Wang;Ziyu Yan;Lipeng Zhong;Qiuqin Sun;Feng Wang
流注放电的研究不仅为高压输电系统的绝缘设计提供了支持，而且为雷电放电的研究奠定了理论基础。流注放电的宏观参数已经得到了研究，但对湿度影响下流注的发展和分支特性的分析还很缺乏。此外，已经建立了不同类型的模型来模拟流注传播。然而，很少有三维模型模拟不同湿度下的多个拖缆的分支过程。本文建立了一个环境参数可控的放电实验平台。实验研究了4.5-19.1 g/ $\text{m}^{\mathbf {{3}$的湿度对流注传播和分支的影响。在此基础上，改进了三维放电树模型，将湿空气中的光电离引入放电树中。此外，我们比较了三维模拟模型的结果与实验数据。通过仿真模型，得到了线电荷密度、电场分布等流注参数。结果表明，湿度越大，流注通道的电场越大，但流注通道的传播速度却越小。湿度限制了对流光分支比的影响。
The research on streamer discharges not only provides support for insulation design of high-voltage power transmission systems, but also lays a theoretical foundation for lightning discharges. The macroscopic parameters of streamer discharges have been investigated, but there is a lack of analysis on the development and branching characteristics of streamers under the effect of humidity. In addition, different types of models have been built to simulate streamer propagation. However, there are few 3-D models which simulate branching process of multiple streamers at different humidity. In this work, a discharge experimental platform with controllable environmental parameters has been built. The effect of the humidity of 4.5–19.1 g/ $\text{m}^{\mathbf {{3}}}$ on streamer propagation and branching has been experimentally studied. Then, the 3-D “discharge tree” model of collective streamers is improved, in which the streamer branching incorporates the photoionization in humid air. Furthermore, we compare the results of the 3-D simulation model with the experimental data. Through the simulation model, the streamer parameters such as line charge density and electric field distribution are obtained. The results show that the electric field of streamer channels is larger when the humidity is higher, but the propagation velocities are reduced. The humidity has limited the effect on the streamer branching ratio.