Motion Behavior of Free Conducting Wire-type Particles in SF<sub>6</sub> Gas Under DC Voltage

ZHANG Qiaogen; YOU Haoyang; MA Jingtan; QIN Yifan; WEN Tao; GUO Can

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Motion Behavior of Free Conducting Wire-type Particles in SF₆ Gas Under DC Voltage

更新时间：2025-12-08

- Motion Behavior of Free Conducting Wire-type Particles in SF₆ Gas Under DC Voltage
- Vol. 44, Issue 3, Pages: 696-703(2018)
- 作者机构：
  
  西安交通大学电力设备电气绝缘国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：30 March 2018，
  
  Published：2018
- 稿件说明：
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ZHANG Qiaogen, YOU Haoyang, MA Jingtan, et al. Motion Behavior of Free Conducting Wire-type Particles in SF₆ Gas Under DC Voltage[J]. 2018, 44(3): 696-703.
DOI：

ZHANG Qiaogen, YOU Haoyang, MA Jingtan, et al. Motion Behavior of Free Conducting Wire-type Particles in SF₆ Gas Under DC Voltage[J]. 2018, 44(3): 696-703. DOI：

摘要

在大量工程和实验中发现

相对于自由球形导电微粒而言

自由线形导电微粒对于设备绝缘性能威胁更大

且直流下微粒更容易进行起跳。为此利用搭建的自由微粒实验装置和观测平台

研究了直流电压下自由线形导电微粒在SF

气体中的运动特性。结果表明:微粒起跳场强随气压无明显变化;随着微粒长度的增加

微粒起跳场强有略微增大的趋势;随着微粒直径的增大

微粒起跳场强呈现指数增长趋势;当微粒长度较短时

随着微粒直径的增加

微粒起跳场强实验值与计算值较为接近;当微粒长度>3 mm时

随着微粒直径的减小

微粒起跳场强实验值与计算值相差较为明显。此外

还研究了线形微粒在SF

气体中特有的两种现象:随着微粒长度增加、半径减小或气压降低

微粒产生飞萤现象和竖立现象的概率均增大

且上极板为正极性时更容易产生这两种现象。最后

文中从空间电荷角度对实验现象做出了解释。

Abstract

Based on a large number of engineering practices

free conducting wire-type particles threaten insulation of facilities more severely compared with sphere-type particles

and particles tend to lift off under a DC voltage. Therefore

we specially designed a free conducting particle experimental device and an observation system to study the motion behavior of free wire-type conducting particles in SF

gas. The results show that lift-off electric field strengths are unchangeable with gas pressure; when lengths of particles increase

lift-off electric fields strengths will increase slightly. When the radius of particles increases

lift-off electric field strengths will increase exponentially; when the length of particles is short

the experimental value and c

alculated value lift-off electric field will be similar as the radius of particles increase; when the length of particles is longer than 3 mm

the experimental value and calculated value are noticeably differential as the radius of particles decreases. Besides

special phenomena of wire-type particles in SF

are discussed

and it is found when the length increases

and the radius decreases or the gas pressure decreases

the appearance probability of "Firefly and Standing still" phenomenon will increase

and the phenomenon will easily appear on the negative electrode. Lastly

the experimental phenomenon is explained in the view of space charge.

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AI问答

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Motion Behavior of Free Conducting Wire-type Particles in SF6 Gas Under DC Voltage

DOI：

摘要

Abstract

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references

Motion Behavior of Free Conducting Wire-type Particles in SF₆ Gas Under DC Voltage