Application of Partial Differential Equation to Suppress White-noise Interference in GIS PD Signals

LAN Hui-li; GAO Yuan; YE Hong-tao; WEN Jia-yan; FENG Ping

doi:10.13296/j.1001-1609.hva.2013.04.001

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Application of Partial Differential Equation to Suppress White-noise Interference in GIS PD Signals

更新时间：2025-04-26

- Application of Partial Differential Equation to Suppress White-noise Interference in GIS PD Signals
- High VoltageApparatus Vol. 49, Issue 4, Pages: 43-48(2013)
- 作者机构：
  
  广西科技大学电气与信息工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2013.04.001
  CLC： O175.2;TP391.41
- Published：2013
- 稿件说明：
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[1]蓝会立,高远,叶洪涛,文家燕,冯平.利用偏微分方程抑制局部放电信号中的白噪声干扰[J].高压电器,2013,49(04):43-48.

LAN Hui-li, GAO Yuan, YE Hong-tao, et al. Application of Partial Differential Equation to Suppress White-noise Interference in GIS PD Signals[J]. High voltageapparatus, 2013, 49(4): 43-48.
[1]蓝会立,高远,叶洪涛,文家燕,冯平.利用偏微分方程抑制局部放电信号中的白噪声干扰[J].高压电器,2013,49(04):43-48. DOI： 10.13296/j.1001-1609.hva.2013.04.001.

LAN Hui-li, GAO Yuan, YE Hong-tao, et al. Application of Partial Differential Equation to Suppress White-noise Interference in GIS PD Signals[J]. High voltageapparatus, 2013, 49(4): 43-48. DOI： 10.13296/j.1001-1609.hva.2013.04.001.

摘要

借助偏微分方程（partial differential equation

PDE）在图像去噪中的平滑滤波原理

提出一种基于PDE的局部放电（partial discharge

PD）信号去噪方法。采用基于Gauss滤波核函数的一维热传导方程去噪模型

利用有限差分法对去噪模型进行数值解。讨论PDE运算迭代次数和噪声强度对去噪效果的影响

当噪声强度在一定范围内时

适度的运算迭代次数可以获得较好的去噪效果。通过对仿真PD信号和现场实测信号试验结果表明

该方法具有去噪后信号能量损失较小

信号边缘细节保留较好

且运算量较少等优点

比其他传统去噪方法更有利于真实PD信号的快速提取。

Abstract

As white noise interference inevitably exists in gas insulated switchgear（GIS）partial discharge（PD） detection

the available suppression methods are unsatisfactory.By studying on partial differential equation（PDE） with its application in picture de-noising

a new de-noising method based on PDE is proposed.PDE de-noising model based on Gauss core function is analyzed in detail

and its numerical solutions is solved by the finite difference method.Moreover

we discuss the impacts of noise intensity and iterations of PDE on de-noising effect by analyzing simulation and experiment.Finally

PDE de-noising method is used to suppress the white-noise in ultrahigh frequency PD signal which is got from GIS field.The de-noised results of field monitoring signal indicate that this method can suppress white-noise effectively

has less energy loss

and keep the edge of signal property.It is conducive to restore the PD signal.

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