Flashover Property of Epoxy Resin and Epoxy Composites under Fast Pulse in Transformer Oil

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Flashover Property of Epoxy Resin and Epoxy Composites under Fast Pulse in Transformer Oil

更新时间：2025-07-09

- Flashover Property of Epoxy Resin and Epoxy Composites under Fast Pulse in Transformer Oil
- Vol. 44, Issue 10, Pages: 83-87(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： TM855
- Online First：10 October 2010，
  
  Published：2010
- 稿件说明：
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Flashover Property of Epoxy Resin and Epoxy Composites under Fast Pulse in Transformer Oil[J]. 2010, 44(10): 83-87.
DOI：

Flashover Property of Epoxy Resin and Epoxy Composites under Fast Pulse in Transformer Oil[J]. 2010, 44(10): 83-87. DOI：

摘要

研究了纳秒级高压脉冲作用下环氧及其复合材料在变压器油中的沿面闪络特性

发现由于多次闪络引起材料表面的破坏和杂质的积累

致使环氧树脂的闪络电压随着闪络次数的增加显著降低

并且随着液压的增加

液体中的气泡运动受到阻碍

闪络电压有明显的升高.对脉冲陡度和沿面闪络电压的关系进行了拟合和外推

发现采用肖特基效应方程的倒数形式可得到较好的拟合效果.不同填料含量的微米TiO

/环氧复合材料的闪络电压随着w(TiO

)的增加呈现“V”形变化趋势

并在w(TiO

)约为20%时出现最低值.

Abstract

The flashover characters under nanosecond pulsed voltage in transformer oil of epoxy resin and epoxy composites are reported. It is indicated that the flashover voltage of epoxy resin decreases while flashover times increase

and the surface damage and impurities caused by multiple flashovers are considered to be the reason. The movement of bubbles is restricted when liquid pressure increases

so the flashover voltage increases evidently. The relationship between pulse steepness and the flashover voltage is fit and extrapolated

and the fit result based on the reciprocal form of Schottky effect equation is preferable. In addition

the research of Micro TiO

/epoxy composite samples with different filler weight percent demonstrates that while the weight percent of TiO

increases the flashover voltage varies as a ‘V' style

and the lowest voltage value is obtained when the filler we

ight gets about 20%.

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references

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