Aging State Evaluation of Insulating Paper Based on Image Feature Recognition

CUI Jiaqi; DONG Haiying; LI Shuaibing; KANG Yongqiang

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Aging State Evaluation of Insulating Paper Based on Image Feature Recognition

更新时间：2025-12-08

- Aging State Evaluation of Insulating Paper Based on Image Feature Recognition
- Vol. 48, Issue 2, Pages: 636-643(2022)
- 作者机构：
  
  1. 兰州交通大学自动化与电气工程学院
  2. 兰州交通大学新能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：28 February 2022，
  
  Published：2022
- 稿件说明：
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CUI Jiaqi, DONG Haiying, LI Shuaibing, et al. Aging State Evaluation of Insulating Paper Based on Image Feature Recognition[J]. 2022, 48(2): 636-643.
DOI：

CUI Jiaqi, DONG Haiying, LI Shuaibing, et al. Aging State Evaluation of Insulating Paper Based on Image Feature Recognition[J]. 2022, 48(2): 636-643. DOI：

摘要

针对现有绝缘纸状态检测方法的不足，提出一种新型无损检测方法，利用拍摄所得绝缘纸图像的纹理特征来评估其老化状态。首先，将不同老化阶段的绝缘纸进行图像采集和预处理，通过计算图像的灰度行程矩阵从而得到其纹理特征值；然后，利用相关分析筛选与聚合度相关性较高的特征，并在此基础上，利用支持向量机对所筛选特征表征绝缘纸老化状态的有效性进行验证；最后，采用多元回归分析法得到关键纹理特征与聚合度的拟合关系式，并采用实测结果进行验证。结果表明，绝缘纸的纹理特征与聚合度具有较好的拟合关系，预测值与实际值的误差率小于10%，验证了所提方法用于绝缘纸老化状态评估的可行性和有效性。该文方法配合伸缩式内窥镜可将理论方法推广到实际应用，为未来变压器检修带来便捷性。

Abstract

To deal with the deficiencies of existing insulating paper state detection methods

a new non-destructive detection method is proposed

in which the texture characteristics of the captured insulating paper images are adopted to evaluate its aging state. Firstly

the insulating papers in different aging stages are collected and preprocessed

and its texture feature value is obtained by calculating the gray-level run-length matrix of the image. Then

correlation analysis is used for filtering the features that are highly correlated with the degree of polymerization. Based on this

the support vector machine is used for verifying the effectiveness of the selected features to characterize the aging state of the insulating paper. Finally

the multiple linear regression method is used to obtain the fitting relationship between the texture features and the degree of polymerization

and it is verified by the actual measured results. The results show that the measured texture characteristics of insulating paper have a good fitting relationship with the degree of polymerization

and the error rate between predicted value and actual value is less than 10%

which verifies the feasibility and effectiveness of this method for evaluating the aging state of insulating paper. The method

combined with the telescopic endoscope

can extend the theoretical method to practical application

and it can bring some convenience for the future transformer maintenance.

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