红外技术, 2018, 40 (12): 1193, 网络出版: 2019-01-23
基于铁帽和盘面温升特征的劣化绝缘子红外检测方法
Infrared Image Synthetic Diagnosis Method of Faulty Insulators Based on Temperature Rise Characteristics of Steel Caps and Disks
红外测温 劣化绝缘子 盘面温升 环境湿度 infrared temperature measurement faulty insulator disk temperature rise environmental humidity
摘要
为了解决传统绝缘子红外检测方法存在检测盲区的问题,在绝缘子盘面温升规律仿真分析和实验研究的基础上,将盘面特征纳入劣化绝缘子诊断判据中,提出了一种基于铁帽和盘面温升特征的劣化绝缘子红外检测方法,现场实测验证情况表明该方法可以提高绝缘子检测的准确率。绝缘子盘面温升规律实验研究表明:劣化绝缘子盘面温度较相邻正常绝缘子低,呈“负温升”特征;“负温升”特征的明显程度与劣化绝缘子在串中位置、环境湿度和表面污秽状况有关:两端位置时劣化绝缘子盘面“负温升”特征更明显,湿度大时劣化绝缘子盘面“负温升”特征更明显。
Abstract
To improve the accuracy of insulator detection technology based on infrared thermal imaging, a diagnosis method based on temperature rise characteristics of insulator steel caps and disks is proposed. According to the voltage distribution of insulator strings and heating model of insulators, the temperature rise law of insulator steel caps and disks is studied. Simulation and experimental results show that the insulator disk temperature of a faulty insulator is lower than that of adjacent normal insulator, which shows negative temperature rise characteristics. The evident degree of negative temperature rise characteristics of faulty insulators is related to environment humidity, insulator surface contamination, and the position of the faulty insulator on the insulator string. The higher the ambient humidity, the more evident is the negative temperature rise characteristic of the faulty insulator disk. When the faulty insulator is at the end of the insulator string, the negative temperature rise characteristics of the faulty insulator disk are more evident.
李唐兵, 龙洋, 万亚玲, 姚建刚, 游勇华, 周求宽. 基于铁帽和盘面温升特征的劣化绝缘子红外检测方法[J]. 红外技术, 2018, 40(12): 1193. LI Tangbing, LONG Yang, WAN Yaling, YAO Jiangang, YOU Yonghua, ZHOU Qiukuan. Infrared Image Synthetic Diagnosis Method of Faulty Insulators Based on Temperature Rise Characteristics of Steel Caps and Disks[J]. Infrared Technology, 2018, 40(12): 1193.