Study on Time Delay Estimation Algorithm in Cable Partial Discharge Location Based on Wavelet Transform

DU Yan; LIAO Rui-jin; ZHOU Quan LU Yun-cai

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Study on Time Delay Estimation Algorithm in Cable Partial Discharge Location Based on Wavelet Transform

更新时间：2025-04-26

- Study on Time Delay Estimation Algorithm in Cable Partial Discharge Location Based on Wavelet Transform
- High VoltageApparatus Issue 5, Pages: 389-393(2007)
- 作者机构：
  
  1. 重庆大学高电压与电工新技术教育部重点实验室
  2. 重庆大学高电压与电工新技术教育部重点实验室重庆400044
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM85
- Published：2007
- 稿件说明：
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[1]杜言,廖瑞金,周湶,陆云才.基于小波变换的电缆局部放电定位中时延算法研究[J].高压电器,2007(05):389-393.

DU Yan, LIAO Rui-jin, ZHOU Quan LU Yun-cai. Study on Time Delay Estimation Algorithm in Cable Partial Discharge Location Based on Wavelet Transform[J]. High voltageapparatus, 2007, (5): 389-393.
[1]杜言,廖瑞金,周湶,陆云才.基于小波变换的电缆局部放电定位中时延算法研究[J].高压电器,2007(05):389-393. DOI：

DU Yan, LIAO Rui-jin, ZHOU Quan LU Yun-cai. Study on Time Delay Estimation Algorithm in Cable Partial Discharge Location Based on Wavelet Transform[J]. High voltageapparatus, 2007, (5): 389-393. DOI：

摘要

在电缆局部放电定位直接相关法的基础上

研究出了一种基于小波变换的广义相关时延估计算法。此算法放宽了直接互相关法对信号与噪声的假设条件且在低信噪比下仍能有效估计时延;同时为了提高时延估计精度

在广义相关时延估计的基础上又研究出了基于基小波的二次加权法。利用PSCAD/EMTDC仿真分析论证了这两种算法在电缆局部放电定位中的有效性。

Abstract

Based on direct correlation method and wavelet transform

a general correlation time delay estimation algorithm was proposed.It extended the assumed condition of direct cross-correlation for signal and noise

and was capable to estimate time-delay effectively under low signal noise ratio.Moreover

a base-wavelet based twice-weighted method was proposed to improve the accuracy of time-delay estimation.Using PSCAD/EMTDC to emulate the cable patrial discharge location

simulation results validated the two algorithms.

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