Effect of Artificial Void Area on Partial Discharge Characters

doi:10.7652/xjtuxb201306018

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Effect of Artificial Void Area on Partial Discharge Characters

更新时间：2025-05-01

- Effect of Artificial Void Area on Partial Discharge Characters
- Vol. 47, Issue 6, Pages: 103-108(2013)
- 作者机构：
  
  广东电网公司电力科学研究院,广州,510080
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201306018
  CLC： TM855
- Online First：10 June 2013，
  
  Published：2013
- 稿件说明：
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Effect of Artificial Void Area on Partial Discharge Characters[J]. 2013, 47(6): 103-108.
DOI：

Effect of Artificial Void Area on Partial Discharge Characters[J]. 2013, 47(6): 103-108. DOI： 10.7652/xjtuxb201306018.

摘要

为了研究局部放电过程中放电面积对放电特性的影响

通过改变气隙面积来改变放电过程中的表面电荷分布

进而研究其对局部放电强度的影响。当气隙尺寸较大时

流注到达界面后可以自由扩展

放电面积变化范围较大导致放电量变化剧烈。气隙直径减小至1.5 mm后

由于放电面积扩展受到限制

放电量变化范围缩小。当气隙面积进一步减小后

放电量均匀程度进一步增加。用铝箔替代聚乙烯覆盖界面

放电面积保持不变

放电量变化范围达到最小。在气隙直径为0.7 mm时

正负半周期各约有一次放电

且正负放电位置重合

这使得前一次放电的放电量对下一次放电的放电相位的影响变得明显。

Abstract

To investigate the effect of discharge area on discharge characters during partial discharge(PD)process

the variation of surface charge distribution is obtained via changing the void area

and its effect on PD magnitude is analyzed. When void size gets larger

streamer spreads freely after landing on the interface

and the discharge area varies in a wider range to lead to an intense fluctuation of discharge magnitude. Once the void diameter reduces to 1.5 mm

the variation range of discharge magnitude narrows due to the restriction of discharge area developing. As the void area becomes much smaller

the uniformity of discharge magnitude increases. Replacing the PE with aluminum foil to cover the interface

the variation range of discharge magnitude decreases to the minimum. When the void diameter gets to 0.7 mm

only one discharge takes place in each positive and negative half cycle

and the discharge locations coincide with each other

which results in an obvious effect of the magnitude of the former discharge on the phase of the subsequent discharge.

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Keywords

references

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