Approach for Time-delay Location of UHF Signals of GIS Partial Discharge Based on Interpolating Cross-correlation Function

LIU Jiaxin; TANG Jianeng; LANG Yexing

doi:10.13296/j.1001-1609.hva.2018.02.011

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Approach for Time-delay Location of UHF Signals of GIS Partial Discharge Based on Interpolating Cross-correlation Function

更新时间：2025-04-26

- Approach for Time-delay Location of UHF Signals of GIS Partial Discharge Based on Interpolating Cross-correlation Function
- High VoltageApparatus Vol. 54, Issue 2, Pages: 62-67(2018)
- 作者机构：
  
  国网辽宁省电力有限公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.02.011
  CLC： TM855
- Published：2018
- 稿件说明：
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[1]刘佳鑫,唐佳能,郎业兴.基于插值互相关函数的GIS局部放电特高频时差定位方法[J].高压电器,2018,54(02):62-67.

LIU Jiaxin, TANG Jianeng, LANG Yexing. Approach for Time-delay Location of UHF Signals of GIS Partial Discharge Based on Interpolating Cross-correlation Function[J]. High voltageapparatus, 2018, 54(2): 62-67.
[1]刘佳鑫,唐佳能,郎业兴.基于插值互相关函数的GIS局部放电特高频时差定位方法[J].高压电器,2018,54(02):62-67. DOI： 10.13296/j.1001-1609.hva.2018.02.011.

LIU Jiaxin, TANG Jianeng, LANG Yexing. Approach for Time-delay Location of UHF Signals of GIS Partial Discharge Based on Interpolating Cross-correlation Function[J]. High voltageapparatus, 2018, 54(2): 62-67. DOI： 10.13296/j.1001-1609.hva.2018.02.011.

摘要

文中提出一种基于插值互相关函数的GIS局部放电特高频时差定位方法。该方法对在较低采样频率下捕获的局部放电特高频信号首先进行三次样条插值处理

再对插值后信号进行互相关分析

以达到精确估计特高频信号时延的目的。该方法能够利用算法提升系统采样频率

从而提高弥补系统硬件的采样性能

同时减小由于信号时延与采样间隔非整数倍匹配所造成的时延估计误差。通过仿真试验分析两组特高频信号的时延

验证了该方法的可行性和有效性。应用该方法成功定位了一起220 k V GIS内部悬浮电位放电缺陷。仿真试验及应用结果表明

利用基于插值互相关函数的特高频时差定位方法

能够准确快速地进行时延估计

提高时延估计准确度27%以上。

Abstract

This paper presents an approach for time-delay location of UHF signals of GIS partial discharge based oninterpolating cross-correlation function. For UHF signals captured under lower sampling frequency

this approachmakes cubic spline interpolation processing and cross-correlation analysis

in order to get accurate estimation ofUHF signal time-delay. This approach not only improves system sampling frequency by algorithm

which can makeup for deficiency of system sampling performance

but also reduces estimation error caused by non-integer multiplesampling interval of signal time-delay. The time-delay of two UHF signals is analyzed by simulation test

in whichthe feasibility and effectiveness is verified. Using this approach

an internal suspension potential discharge defect of220 k V GIS is successfully solved. The result of simulation and application shows that the accuracy of time-delay esti-mation is effectively improved by using this approach.

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