Analysis on Time-frequency Characteristics of Electrical Tree Discharge in Different Growth Stages

CHEN Shi-jun 1; YE Di 2; LIU Hua-lin 1; YANG Tong-jiang 1

doi:10.13296/j.1001-1609.hva.2013.03.009

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Analysis on Time-frequency Characteristics of Electrical Tree Discharge in Different Growth Stages

更新时间：2025-04-26

- Analysis on Time-frequency Characteristics of Electrical Tree Discharge in Different Growth Stages
- High VoltageApparatus Vol. 49, Issue 3, Pages: 49-52+58(2013)
- 作者机构：
  
  1. 贵州电力试验研究院
  2. 重庆市电力公司南坪供电局
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2013.03.009
  CLC： TM75
- Published：2013
- 稿件说明：
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[1]陈仕军,叶笛,刘华麟,杨通江.不同生长阶段下电树枝放电的时频特征分析[J].高压电器,2013,49(03):49-52+58.

CHEN Shi-jun 1, YE Di 2, LIU Hua-lin 1, et al. Analysis on Time-frequency Characteristics of Electrical Tree Discharge in Different Growth Stages[J]. High voltageapparatus, 2013, 49(3): 49-52+58.
[1]陈仕军,叶笛,刘华麟,杨通江.不同生长阶段下电树枝放电的时频特征分析[J].高压电器,2013,49(03):49-52+58. DOI： 10.13296/j.1001-1609.hva.2013.03.009.

CHEN Shi-jun 1, YE Di 2, LIU Hua-lin 1, et al. Analysis on Time-frequency Characteristics of Electrical Tree Discharge in Different Growth Stages[J]. High voltageapparatus, 2013, 49(3): 49-52+58. DOI： 10.13296/j.1001-1609.hva.2013.03.009.

摘要

采用针缺陷短电缆试验平台

研究电缆电树枝不同生长阶段的时频放电特征

研究发现

在电树枝发展的早期

电树枝放电的频率主要集中在5

.5 MHz之间

随着电树枝的不断发展

在7.5

0 MHz频段内的局部放电信号逐渐增加

在电树枝生长的末期

位于7.5

0 MHz频段内的放电量幅值达到最大

约是5

.5 MHz频段放电的5倍。分析认为在电树枝生长的末期

放电通道越接近电缆线芯

其放电信号的频率越高

放电量越大。

Abstract

Time-frequency characteristics of electric tree discharge during different growth stages were analyzed on an experiment platform of cable with needle-defects.The results show that: in early growth stage of electrical tree

the frequency of discharge signal is within 5

.5 MHz

and the partial discharge signal intensifies gradually in the 7.5

0 MHz band with the growth of the electrical tree;at latter end of the electrical tree growth

the amplitude of the discharge capacity in the band of 7.5

0 MHz gets the maximum

about 5 times of that in the lower frequency band

and the closer the discharge channel from the cable core

the higher the discharge signal frequency of the electrical tree.

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