Partial Discharge Characteristics over Oil/Paper Interface

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Partial Discharge Characteristics over Oil/Paper Interface

更新时间：2025-05-08

- Partial Discharge Characteristics over Oil/Paper Interface
- Vol. 43, Issue 6, Pages: 108-112(2009)
- 作者机构：
  
  西安交通大学电气工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM835.4
- Online First：10 June 2009，
  
  Published：2009
- 稿件说明：
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Partial Discharge Characteristics over Oil/Paper Interface[J]. 2009, 43(6): 108-112.
DOI：

Partial Discharge Characteristics over Oil/Paper Interface[J]. 2009, 43(6): 108-112. DOI：

摘要

采用局部放电测量方法

研究了油/纸沿面从局部放电起始到贯穿闪络整个过程中局部放电量、放电谱图、放电频率及单个放电脉冲的变化情况.采用两种具有不同老化程度的油样研究了油样在沿面闪络过程中对局部放电测量结果的影响.研究结果表明

在初始电子产生阶段

放电量和放电频率均很小

放电集中在工频峰值处

随着电压的升高

放电量和放电频率随之升高

放电处于工频上升处.当临近沿面闪络时

放电量会迅速增大

放电脉冲呈现脉冲序列形式

会听到较大的放电声.油样的老化会降低局部放电起始电压

并导致沿面放电在流注发展阶段的放电量和放电频率增加.

Abstract

The discharge charges

discharge pattern

discharge frequency and current pulse are measured from partial discharge(PD)inception to flashover. Two oil specimens with different aging degree are used

and its influence on flashover process over oil/paper interface is investigated in this experiment. The results indicate that the PD charges and PD frequency are small in inception stage

and PD happens in the crest of power frequency. The PD charges and PD frequency increase with the applied voltage rising

and PD occurs in the ascent block of power frequency. The PD charges significantly increase when the discharge develops to critical flashover stage

and the current pulse bursts. The PD inception voltage decreases to some extent in aged oil specimen. The oil aging degree exerts a great influence on PD charges and PD frequency in streamer development stage.

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references

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李光杰. 纳秒脉冲下变压器油中绝缘介质沿面闪络特性的实验研究[D]. 北京:中国科学院研究生院,2006.

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