Impact of Oil-Paper Barrier on Detected UHF Signal of Partial Discharge in Transformer

GAO Hong-wu; LI Jian; CHENG Chang-kui; JIN Zhuo-rui; WANG You-yuan

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Impact of Oil-Paper Barrier on Detected UHF Signal of Partial Discharge in Transformer

更新时间：2025-05-17

- Impact of Oil-Paper Barrier on Detected UHF Signal of Partial Discharge in Transformer
- High VoltageApparatus Vol. 45, Issue 4, Pages: 118-121(2009)
- 作者机构：
  
  重庆大学电气工程学院输配电设备及系统安全与新技术国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM407
- Published：2009
- 稿件说明：
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[1]高红武,李剑,程昌奎,金卓睿,王有元.油纸屏障对变压器局部放电超高频检测信号的影响[J].高压电器,2009,45(04):118-121.

GAO Hong-wu, LI Jian, CHENG Chang-kui, et al. Impact of Oil-Paper Barrier on Detected UHF Signal of Partial Discharge in Transformer[J]. High voltageapparatus, 2009, 45(4): 118-121.
[1]高红武,李剑,程昌奎,金卓睿,王有元.油纸屏障对变压器局部放电超高频检测信号的影响[J].高压电器,2009,45(04):118-121. DOI：

GAO Hong-wu, LI Jian, CHENG Chang-kui, et al. Impact of Oil-Paper Barrier on Detected UHF Signal of Partial Discharge in Transformer[J]. High voltageapparatus, 2009, 45(4): 118-121. DOI：

摘要

受变压器内部复杂结构的影响

局部放电超高频信号在变压器内部的传播特性非常复杂。笔者通过变压器局部放电超高频实验研究

分析了油纸屏障对变压器局部放电被测超高频信号的影响。设计了油中气隙放电、油中沿面放电和油中电晕放电3种局部放电模型

在实验油箱中进行局部放电实验

采用超高频小环天线进行放电信号检测

在有无油纸屏障情况下获得了局部放电超高频信号实测数据

对所测局部放电超高频信号在时域和频域上进行了对比分析。结果表明

油纸屏障对超高频信号幅值衰减及信号功率谱有一定影响。

Abstract

Due to complex internal structure of a transformer

the propagation characteristics of the partial discharge ultra-high frequency（UHF） signal are very complicated.The authors analyze the impact of the oil-paper barriers to the PD UHF signal via a PD UHF experiment

and design three different test models of cavity discharge

surface discharge and corona discharge in oil.These models are put in an oil tank respectively for experiment.A small loop UHF antenna is designed for PD detection under the condition with or without oil-paper barrier.The detected PD UHF signal is analyzed in time domain and frequency domain

respectively.Analysis results show that oil-paper barrier has a certain influence on detected UHF signal in amplitude and power spectrum.

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