Experimental Research and Simulation Analysis on Partial Discharge Signal Propagation Characteristics in 10 kV Power Cables

ZHANG Chang’an; FAN Bintao; HUANG Yin; ZHAN Fuzhi; LI Jianfeng; ZHANG Zhe; ZHAO Xu; MENG Guodong

doi:10.13296/j.1001-1609.hva.2023.01.014

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Experimental Research and Simulation Analysis on Partial Discharge Signal Propagation Characteristics in 10 kV Power Cables

更新时间：2025-04-26

- Experimental Research and Simulation Analysis on Partial Discharge Signal Propagation Characteristics in 10 kV Power Cables
- High VoltageApparatus Vol. 59, Issue 1, Pages: 95-101(2023)
- 作者机构：
  
  1. 陕西省地方电力(集团)有限公司
  2. 陕西能源研究院有限公司
  3. 西安交通大学电力设备电气绝缘国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2023.01.014
  CLC： TM855
- Published：2023
- 稿件说明：
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ZHANG Chang’an, FAN Bintao, HUANG Yin, et al. Experimental Research and Simulation Analysis on Partial Discharge Signal Propagation Characteristics in 10 kV Power Cables[J]. High voltageapparatus, 2023, 59(1): 95-101.
DOI：

ZHANG Chang’an, FAN Bintao, HUANG Yin, et al. Experimental Research and Simulation Analysis on Partial Discharge Signal Propagation Characteristics in 10 kV Power Cables[J]. High voltageapparatus, 2023, 59(1): 95-101. DOI： 10.13296/j.1001-1609.hva.2023.01.014.

摘要

探究局部放电在电缆中的传播特性对于信号放电水平的测定、放电位置的定位及与环境干扰噪声的区分均有着重要的意义。以配电网10 kV电力电缆为研究对象，测量了4种放电量（2、5、10、20 nC）的放电信号在100～600 m电缆本体中传播特性，得到了放电量和幅值随传播距离的变化规律，分析了不同频率分量的局放信号随传播距离的衰减特性，最后在CST软件中对放电信号在电缆中的传播进行了仿真，验证了实验的有效性，并讨论了误差产生的原因。实验结果表明：放电信号的幅值变化呈现负指数衰减，但由于信号脉宽在不断增大，使得实际放电量衰减低于幅值衰减；放电信号中所含的频率分量将直接影响信号的波形变换从而影响幅值与放电量的衰减；对于放电信号中不同频率分量随距离传播的衰减率与频率大小线性相关。

Abstract

It is of great significance to explore the propagation characteristics of partial discharge in cables for the determination of parital discharge level

the location of discharge position and the differentiation from ambient interference noise. The 10 kV power cable of distribution network is taken as the research object

the propagation characteristics of four discharge signals（2

10 nC and 20 nC）in 100～600 m cables are measured. The variation of discharge magnitude and amplitude with the propagation distance and the attenuation characteristics of different frequency components with the propagaton discharge are analyzed. Finally

the propagation of discharge signal in the cable is simulated and verified in CST software

the experimental effectiveness is verified and the causes of the generated errors are discussed. The experimental results show that the amplitude variation of the discharge signal presents a negative exponential attenuation

but the attenuation of actual discharge magnitude is lower than that of amplitude due to the increase of the signal pulse width. The frequency component in the discharge signal will directly affect the waveform transformation of the signal

thus affecting the attenuation of the amplitude and discharge magnitude. For the discharge signal

the attenuation rate of different frequency components propagated with distance is linearly related to frequency.

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