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文章摘要
基于GLCM和LBP的局部放电灰度图像特征提取
Feature Extraction for Partial Discharge Grayscale Image Based on Gray Level Co-occurrence Matrix and Local Binary Pattern
Received:August 05, 2015  Revised:October 08, 2015
DOI:
中文关键词: 变压器局部放电  特征提取  灰度共生矩阵  局部二值模式  支持向量机
英文关键词: transformer  partial discharge, feature  extraction, gray  level co-occurrence  matrix, local  binary pattern, support  vector machine
基金项目:中央高校基本科研业务费专项资金资助项目;国家电网公司科技项目
Author NameAffiliationE-mail
Zhao Lei* State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources North China Electric Power University zhaoleizozelar@163.com 
Zhu Yongli State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources North China Electric Power University  
Jia Yafei State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources North China Electric Power University  
Zhang Ning State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources North China Electric Power University 841858517@qq.com 
Guo Xiaohong State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources North China Electric Power University  
Yuan Liang State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources North China Electric Power University  
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中文摘要:
      针对变压器局部放电模式识别中传统统计谱图特征提取维数高、识别率差等问题,提出基于灰度共生矩阵和局部二值模式的局部放电灰度图像纹理特征提取方法。该方法从宏观角度将灰度图像转化为灰度共生矩阵并获取其8维特征,从微观角度计算邻域像素相对灰度响应并获取其10维特征量。搭建四种局部放电实验模型,通过脉冲电流法采集局部放电信号;结合两类特征,以支持向量机作为分类器来识别放电类型并用传统特征提取方法作为对比。结果表明利用该方法提取灰度图像特征在避免特征灾难的同时仍有较高识别率,能有效识别四种放电模型,验证了该方法的有效性。
英文摘要:
      In allusion to the defect of traditional statistical spectrum feature extraction of transformer partial discharge (PD) pattern recognition such as high dimension and low recognition accuracy, a novel method to extract the feature of PD grayscale image based on gray level co-occurrence matrix (GLCM) and local binary pattern (LBP) is proposed. According to the proposed method, grayscale image is transformed to GLCM to obtain 8 features of GLCM from a macro perspective and relative grayscale response of neighbor pixels is calculated based on LBP to obtain 10 features of LBP from a micro perspective. PD signals of four experimental models are collected by using pulse current method, combining two kinds of features, support vector machine is used as the classifier to recognize four PD types, and one traditional feature extraction method is used for comparison. The results show that the proposed method can overcome the defect of high dimension and also have a high recognition accuracy, effectively identify the four PD models, and verify that the proposed method is effective.
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