利用辐射UHF信号反演局部放电脉冲电流

ZHOU Li-xing; LI Wei-guo

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利用辐射UHF信号反演局部放电脉冲电流

更新时间：2025-08-13

- 利用辐射UHF信号反演局部放电脉冲电流
- Automation of Electric Power Systems Vol. 30, Issue 8, (2006)
- 作者机构：
  
  1. 长沙理工大学电气与信息学院,湖南省,长沙市,410076
  2. 武汉大学电气工程学院,湖北省,武汉市,430072
  3. 华北电力大学电气工程学院,北京市,102201
- 作者简介：
- 基金信息：
- DOI：
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- Published：2006
- 稿件说明：
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ZHOU Li-xing, LI Wei-guo. [J]. Automation of electric power systems, 2006, 30(8).
DOI：

ZHOU Li-xing, LI Wei-guo. [J]. Automation of electric power systems, 2006, 30(8). DOI：

摘要

获取局部放电（PD）特征信息是局部放电特高频（UHF）检测的关键问题之一，研究UHF信号与PD脉冲电流之间的关系有助于绝缘缺陷的诊断。文中从电磁辐射理论出发，计算了变压器油箱外壳等复杂环境影响下的PD脉冲电流辐射场，分析了PD脉冲电流辐射场的横电磁波特性。在此基础上，提出了利用检测UHF信号的时间积分反演PD点脉冲电流的新方法，并讨论了UHF传感器及检测系统频带对PD脉冲电流推测算法的影响。仿真和油中针-板型放电实验结果表明:文中所提出的方法能有效推测PD脉冲电流波形，对变压器PD信号UHF在线监测和智能化诊断有一定的参考价值。

Abstract

Obtaining the partial discharge（PD） characteristic is one of the key issues of PD ultra-high frequency（UHF） detection. To study the relation between PD pulse current and its UHF signal is helpful to the insulation diagnosis. According to the theory of electromagnetic radiation， the radiating field of the PD pulse current under the influence of the metallic tank shell is deduced and its transverse electromagnetic wave characteristic is analyzed in this paper. Based on the above， a new method for deducing PD pulse currents with the time integral of its radiating UHF signals is presented， and the influence of UHF measuring system frequency bandwidth on the algorithm is also discussed. Simulation results and the typical needle-board discharge experiment show that the proposed method can effectively estimate the PD pulse shape and is of value for on-line monitoring and intelligent diagnosis of UHF PD in power transformers.

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