基于多尺度模板匹配的配电线路劣化绝缘子红外热像检测  

Infrared Thermal Image Detection of Faulty Insulators in Distribution Lines Based on Multi-scale Template Matching

作　　者：童志鹏 邱志斌 吴睿雯 周志彪 范鹏[2] 沈厚明 TONG Zhipeng;QIU Zhibin;WU Ruiwen;ZHOU Zhibiao;FAN Peng;SHEN Houming(Department of Energy and Electrical Engineering,Nanchang University,Nanchang 330031,China;Wuhan NARI Co.Ltd.,State Grid Electric Power Research Institute,Wuhan 430074,China)

机构地区：[1]南昌大学能源与电气工程系,江西南昌330031 [2]国网电力科学研究院武汉南瑞有限责任公司,湖北武汉430074

出　　处：《红外技术》2023年第12期1337-1345,共9页Infrared Technology

摘　　要：瓷绝缘子在配电线路中应用广泛,受长期机电应力与户外恶劣环境影响,在运行中易发生劣化。红外热像法是一种重要的劣化绝缘子带电检测方法,具有检测方便、安全高效和非接触式的优点,已成为线路巡检的重要手段,但劣化绝缘子热像特征不明显,肉眼识别易出现误判。为此,本文首先对配电线路瓷绝缘子进行温度场仿真分析,然后提出了一种劣化绝缘子红外热像检测方法,采用多尺度模板匹配算法定位识别绝缘子,获取绝缘子红外图像中的坐标参数,并对其进行分割提取,通过最小二乘线性拟合提取绝缘子表面温度。结合相关标准与仿真分析结果,通过同类比较判断法对比多个绝缘子温度状态的差异,实现劣化绝缘子检测。Porcelain insulators are widely used in power distribution lines,but they are susceptible to deg-radation during operation owing to long-term electromechanical stress and harsh outdoor environments.Infrared thermal imaging is an important live insulator degradation detection method.It has the advantages of convenient detection,safety,high efficiency,and non-contact operation.It has become an important method in power inspection.However,the thermal image characteristics of faulty insulators are not evi-dent and cannot be recognized directly by the naked eye.Therefore,in this study,we first conduct a temperature field simulation analysis of porcelain insulators in distribution lines and then propose an in-frared thermal image detection method for faulty insulators.A multi-scale template matching algorithm is used to locate and identify the insulators.The coordinate parameters of the insulator in the infrared image are obtained,the insulator is segmented and extracted by multi-scale template matching,and the tempera-ture of the insulator is extracted by least-square linear fitting.Combined with the relevant standards and simulation analysis results,the differences in the temperature states among multiple insulators were com-pared using a similar comparison judgment method to detect faulty insulators.

关 键 词：劣化绝缘子 红外热像法 图像处理 图像匹配 温度提取 

分 类 号：TM726[电气工程—电力系统及自动化]