Experimental study on streamer-leader transition characteristics of sphere-plane gap in valve hall under positive switching impulse voltage

IF 1.9 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Electrostatics Pub Date : 2023-09-01 DOI:10.1016/j.elstat.2023.103829

Yaqi Fang , Suhan Mao , Bingsen Yang , Hongxian Tu , Zhi Zhang , Junkang Fang , Xiaoxing Zhang

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Abstract

Since a large number of spherical shielding balls are adopted in valve hall, investigating discharge characteristics of sphere-plane gap is of great significance for insulation design in HVDC projects. In order to study the discharge physical process of sphere-plane gap, this paper conducts sphere-plane gap experiment with gap distance set to 1.0 m and 1.5 m and electrode diameter set to 0.2 m, 0.3 m and 0.4 m under positive switching impulse voltage. The experimental comparative analysis of the discharge process of streamer-leader transition, and the physical parameters such as leader velocity and the amount of injected charge are calculated. The results show that the streamer to leader transition process is accelerated as the spherical electrode diameter increases. The leader velocity of sphere-plane gap is almost consistent with that of rod-plane gap. And the charge injected into initial streamer is much high than that of rod-plane gap.

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正开关脉冲电压下阀厅球平面间隙流-引线过渡特性实验研究

由于阀厅采用了大量的球形屏蔽球，研究球面间隙的放电特性对高压直流工程的绝缘设计具有重要意义。为了研究球平面间隙的放电物理过程，本文在正开关冲击电压下，分别将间隙距离设置为1.0 m和1.5 m，电极直径设置为0.2 m、0.3 m和0.4 m，进行了球平面间隙实验。对飘带-先导过渡的放电过程进行了实验对比分析，计算了先导速度和注入量等物理参数。结果表明，随着球形电极直径的增大，流线向引线的过渡过程加快。球面间隙的前导速度与杆面间隙的前导速度基本一致。注入初始流线的电荷量远高于栅面间隙的电荷量。

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来源期刊

Journal of Electrostatics 工程技术-工程：电子与电气

CiteScore

4.00

自引率

11.10%

发文量

审稿时长

49 days

期刊介绍： The Journal of Electrostatics is the leading forum for publishing research findings that advance knowledge in the field of electrostatics. We invite submissions in the following areas: Electrostatic charge separation processes. Electrostatic manipulation of particles, droplets, and biological cells. Electrostatically driven or controlled fluid flow. Electrostatics in the gas phase.