Typical Pulse Shape and Feature Extraction of PD Signals in Oil-paper Insulation under DC Voltage

REN Yin-yin

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Typical Pulse Shape and Feature Extraction of PD Signals in Oil-paper Insulation under DC Voltage

更新时间：2025-04-26

- Typical Pulse Shape and Feature Extraction of PD Signals in Oil-paper Insulation under DC Voltage
- High VoltageApparatus Issue 5, Pages: 438-441(2008)
- 作者机构：
  
  佛山供电局
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM835.4
- Published：2008
- 稿件说明：
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[1]任寅寅.直流下油纸绝缘中局部放电脉冲典型波形及其参数提取[J].高压电器,2008(05):438-441.

REN Yin-yin. Typical Pulse Shape and Feature Extraction of PD Signals in Oil-paper Insulation under DC Voltage[J]. High voltageapparatus, 2008, (5): 438-441.
[1]任寅寅.直流下油纸绝缘中局部放电脉冲典型波形及其参数提取[J].高压电器,2008(05):438-441. DOI：

REN Yin-yin. Typical Pulse Shape and Feature Extraction of PD Signals in Oil-paper Insulation under DC Voltage[J]. High voltageapparatus, 2008, (5): 438-441. DOI：

摘要

笔者介绍了直流下局部放电脉冲波形测量系统的组建以及测量电阻的校验。利用该试验系统对模拟换流变压器油纸绝缘的5种典型缺陷模型进行了局放脉冲波形测量。试验结果表明:直流下油纸绝缘中缺陷放电稳定

脉冲波形无振荡分量和过冲

且不随电压变化而发生畸变。在对典型脉冲波形进行预处理的前提下

使用形状参数法、自相关函数法、AR模型参数法以及Renvi信息量进行了波形特征参数提取。所得结果为深入研究直流下油纸绝缘中局部放电机理、局放在线监测系统的频率特性以及放电类型的波形识别提供了实验依据。

Abstract

A test system with wide frequency response designed to measure pulse shape of partial discharge was introduced in this paper.The measuring impedance was tested by square wave with very steep trailing edge and the corona in air under DC voltage was detected

all of which proved the whole system meet the specification.According to the analysis of defects in oil-paper insulation of the converter transformer

five corresponding PD models were designed.With using the UWB detection system

plenty of the PD pulses were obtained to get the typical pulse shapes in oil-paper insulation under DC voltage.The results show that the PD pulse shapes of the defects in oil under DC voltage are non-oscillatory

and have no overshoot.The feature parameters of the pulse shapes extracted by shape in time domain

self-correlation

AR model and Renyi information methods differ with different discharge models.All these will be help for the research of the mechanism of PD in oil-paper insulation system

the spectral characteristic of on-filed monitoring system and the identification of different PD pulse shapes under DC voltage.

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Related Institution

State Key Laboratory of Electrical Insulation for Power Equipment, Xi’an Jiaotong University

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Fuzhou Ultra-high Voltage T&D Bureau

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