Definition and Digital Algorithms for Dielectric Loss Factor of High Voltage Power Apparatus under Harmonics Condition

ZHANG Zhong-lei; LI Qing-min; CHEN Peng

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Definition and Digital Algorithms for Dielectric Loss Factor of High Voltage Power Apparatus under Harmonics Condition

更新时间：2025-04-26

- Definition and Digital Algorithms for Dielectric Loss Factor of High Voltage Power Apparatus under Harmonics Condition
- High VoltageApparatus Issue 5, Pages: 327-329+332(2004)
- 作者机构：
  
  1. 山东大学电气工程学院
  2. 山东大学电气工程学院山东济南250061
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM835.1
- Published：2004
- 稿件说明：
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[1]张忠蕾,李庆民,陈鹏.谐波条件下高压电气设备介质损耗因数的定义和数字化算法[J].高压电器,2004(05):327-329+332.

ZHANG Zhong-lei, LI Qing-min, CHEN Peng. Definition and Digital Algorithms for Dielectric Loss Factor of High Voltage Power Apparatus under Harmonics Condition[J]. High voltageapparatus, 2004, (5): 327-329+332.
[1]张忠蕾,李庆民,陈鹏.谐波条件下高压电气设备介质损耗因数的定义和数字化算法[J].高压电器,2004(05):327-329+332. DOI：

ZHANG Zhong-lei, LI Qing-min, CHEN Peng. Definition and Digital Algorithms for Dielectric Loss Factor of High Voltage Power Apparatus under Harmonics Condition[J]. High voltageapparatus, 2004, (5): 327-329+332. DOI：

摘要

简要回顾了高压电气设备在线监测与故障诊断技术的研究现状和应用情况。基于绝缘电介质物理特性

提出了谐波条件下介质损耗因数的新定义

以更合理地评估电气设备的运行状况

并给出了相应的数字化算法。为配合实现介质损耗因数的新定义策略

给出了两种算法:阻容解耦法和基波逼近法。通过计算机仿真分析了背景噪声和电网频率波动对介质损耗因数估算准确度的影响。结果表明

基波逼近法比阻容解耦法的应用误差小。建议采用同时监测全电流、介质损耗因数、阻性电流和容性电流的综合策略来有效评估和诊断电介质的绝缘状况。

Abstract

Experience and applications of the currently available methods for on-line monitoring and diagnosis of high voltage power apparatus are briefly reviewed. Based on the dielectric physics

a new definition of dielectric loss factor with harmonics feature is proposed to evaluate the operational conditions of power apparatus on a more reasonable basis

along with corresponding digitised algorithms. Two approaches

namely the decoupling algorithm and the approximating algorithm

are presented to implement the methodologies with the new definition of dielectric loss factor. The impacts of background noise and power frequency fluctuation on estimation accuracy are analysed by computer simulations showing better application qualities of the approximating algorithm than the decoupling one. A comprehensive strategy of simultaneous monitoring of sum current

dielectric loss factor

resistive current and capacitive current is recommended to give an effective assessment and diagnosis.

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