Recognition of Flashover Fault on the Iced Insulator Based on Frame Segmentation and Wavelet Technology for Leakage Current

LI Yi1; ZHOU Ye1; ZHONG Hao1; WU Zheng-qiu1; HU Xiang-yang2; NIE Yun2; LI Jian-qi3

doi:10.13296/j.1001-1609.hva.2011.02.006

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Recognition of Flashover Fault on the Iced Insulator Based on Frame Segmentation and Wavelet Technology for Leakage Current

更新时间：2025-04-26

- Recognition of Flashover Fault on the Iced Insulator Based on Frame Segmentation and Wavelet Technology for Leakage Current
- High VoltageApparatus Vol. 47, Issue 2, Pages: 27-30(2011)
- 作者机构：
  
  1. 湖南大学电气与信息工程学院
  2. 湖南省电力公司张家界电业局
  3. 中南林业科技大学
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2011.02.006
  CLC： TM216
- Published：2011
- 稿件说明：
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[1]李毅,周野,钟浩,吴政球,胡向阳,聂云,李建奇.利用泄漏电流分帧与小波技术识别覆冰绝缘子闪络故障[J].高压电器,2011,47(02):27-30.

LI Yi1, ZHOU Ye1, ZHONG Hao1, et al. Recognition of Flashover Fault on the Iced Insulator Based on Frame Segmentation and Wavelet Technology for Leakage Current[J]. High voltageapparatus, 2011, 47(2): 27-30.
[1]李毅,周野,钟浩,吴政球,胡向阳,聂云,李建奇.利用泄漏电流分帧与小波技术识别覆冰绝缘子闪络故障[J].高压电器,2011,47(02):27-30. DOI： 10.13296/j.1001-1609.hva.2011.02.006.

LI Yi1, ZHOU Ye1, ZHONG Hao1, et al. Recognition of Flashover Fault on the Iced Insulator Based on Frame Segmentation and Wavelet Technology for Leakage Current[J]. High voltageapparatus, 2011, 47(2): 27-30. DOI： 10.13296/j.1001-1609.hva.2011.02.006.

摘要

在人工气候室内

通过动态采集3片串XP-70覆冰绝缘子融冰过程中的泄漏电流

并在比较传统利用时频域分析泄漏电流存在不足的基础上

提出了对闪络全过程的泄漏电流采用分帧计算参考量:短时能量信号和过零率信号的极值

利用小波分解重构能量信号与过零率信号的包络曲线

从而从数值和曲线2个直观的角度快速地为覆冰绝缘子闪络故障的发生提供预警。

Abstract

The traditional leakage current’s time-frequency analysis method has some insufficiencies.Through dynamic measuring leakage current on the 3-piece string iced insulators at ice-melting stage in artificial climate chamber

this paper proposed that uses frame segmentation method to calculate the reference values:the extreme value of short-time energy signal and zero-cross signal.Through using wavelet decomposition reconstructing the envelope curves of energy signal and zero-cross signal

provides early warning for iced insulators flashover fault from both data and curve aspects.

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