Simulation of PD Propagation Characteristics in XLPE Cables Based on Vector Fitting Model

CHEN Xiping; YANG Yuqi; LIU Bin; SUN Zhenquan; ZHANG Wei

doi:10.13296/j.1001-1609.hva.2015.04.022

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Simulation of PD Propagation Characteristics in XLPE Cables Based on Vector Fitting Model

更新时间：2025-04-26

- Simulation of PD Propagation Characteristics in XLPE Cables Based on Vector Fitting Model
- High VoltageApparatus Vol. 51, Issue 4, Pages: 119-123(2015)
- 作者机构：
  
  1. 陕西省地方电力(集团)有限公司
  2. 西安交通大学
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2015.04.022
  CLC： TM855
- Published：2015
- 稿件说明：
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[1]陈西平,杨宇琦,刘斌,孙振权,张伟.基于矢量拟合模型的交联聚乙烯电缆中局部放电传播特性仿真研究[J].高压电器,2015,51(04):119-123.

CHEN Xiping, YANG Yuqi, LIU Bin, et al. Simulation of PD Propagation Characteristics in XLPE Cables Based on Vector Fitting Model[J]. High voltageapparatus, 2015, 51(4): 119-123.
[1]陈西平,杨宇琦,刘斌,孙振权,张伟.基于矢量拟合模型的交联聚乙烯电缆中局部放电传播特性仿真研究[J].高压电器,2015,51(04):119-123. DOI： 10.13296/j.1001-1609.hva.2015.04.022.

CHEN Xiping, YANG Yuqi, LIU Bin, et al. Simulation of PD Propagation Characteristics in XLPE Cables Based on Vector Fitting Model[J]. High voltageapparatus, 2015, 51(4): 119-123. DOI： 10.13296/j.1001-1609.hva.2015.04.022.

摘要

近些年来交联聚乙烯电缆由于诸多优点在配电网中的用量越来越大。局部放电信号的检测及定位技术是电力电缆中绝缘状态监测的重要环节

因此研究局部放电信号在电缆中的传播特性是十分必要的。文中给出了考虑导体集肤效应和半导体层特性的单芯交联聚乙烯电缆模型

为了分析局部放电脉冲在时域中的传播特性

首先使用矢量拟合的方法对频域模型进行有理逼近

并在拟合结果的基础上

提出了电力电缆π单元集总参数模型。最后基于该模型对局部放电脉冲在两种具有不同半导体层特性的交联聚乙烯电缆中的传播进行了仿真。计算结果表明:电缆中的高频局部放电脉冲幅值具有较强的衰减;所述模型能够对电缆中的局部放电传播特性进行分析

为电力电缆的局部放电检测和故障诊断提供指导。

Abstract

Cross linked polyethylene cable are using more and more in distribution network due to its obvious advantages over other transmission equipment. Partial discharge（PD） detection and location is of great significance for the power cable insulation condition monitoring

where analysis of the PD propagation is needed. Considering the influence of skin effect and semi-conducting screens

this paper presents the single-core model of cross-linked polyethylene（XLPE）cable. To analysis the propagation of PD pulse in time domain

the model firstly is rational approximated using vector fitting method. Based on the fitting results

the π section lumped parameters model is then proposed. Two examples of two XLPE cables with different permittivity approximating forms of semiconducting screens are presented. Calculation results show that there is a strong attenuation for high-frequency PD pulse amplitude in cable. The proposed model can be used to analyse the propagation characteristics of PD signals

which will be helpful for the PD detection and defects identification in power cable.

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