Effect of Voltage Reverse Time on Space Charge and Transient Field in Polyethylene

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Effect of Voltage Reverse Time on Space Charge and Transient Field in Polyethylene

更新时间：2025-07-09

- Effect of Voltage Reverse Time on Space Charge and Transient Field in Polyethylene
- Vol. 44, Issue 10, Pages: 105-109(2010)
- 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,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM215.1
- Online First：10 October 2010，
  
  Published：2010
- 稿件说明：
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Effect of Voltage Reverse Time on Space Charge and Transient Field in Polyethylene[J]. 2010, 44(10): 105-109.
DOI：

Effect of Voltage Reverse Time on Space Charge and Transient Field in Polyethylene[J]. 2010, 44(10): 105-109. DOI：

摘要

基于电声脉冲空间电荷测量方法

测量了聚乙烯片状试样在常温(ΔT=0 ℃)及温度梯度(ΔT=40 ℃)下、-50 kV/mm场强直流预压2 h后

分别以不同反转时间(20 s

30 s

60 s)反转到50 kV/mm场强

再加压2 h过程中的空间电荷变化

以及极性反转过程中最大瞬态电场的变化.结果表明:常温下电压极性反转越快

最大瞬态电场越大; 温度梯度下

电压极性反转越快

最大瞬态电场越小; 达到最大瞬态电场的时间均随着极性反转时间的增加而逐渐减少.

Abstract

Adopting pulsed electro-acoustic method space charge measurement method

space charge profiles and maximal transient fields of polyethylene(PE)films were measured at room temperature(ΔT=0 ℃)and under temperature gradient(ΔT=40 ℃)

when DC stress of -50 kV/mm was applied for 2 hours and then voltage polarity reverses to stress of 50 kV/mm with the time of 20 s

30 s and 60 s respectively. The test results show that the faster the voltage reversal at room temperature the higher the maximal transient field. However under temperature gradient(ΔT=40 ℃)

the faster the voltage reversal the lower the maximal transient field

and the time reaching the maximal transient field decreases with the increase of voltage reverse time gradually.

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references

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