基于红外测温的零值和污秽绝缘子快速检测试验研究  

Fast Detection of Zero Insulator and Polluted Insulator Based on Infrared Temperature Measurement

作　　者：陈勇[1] 郭俊峰 邬小均 

机构地区：[1]重庆市电力公司万州供电局,重庆404000 [2]重庆润创科技有限公司,重庆400050

出　　处：《高压电器》2015年第6期191-194,199,共5页High Voltage Apparatus

摘　　要：红外测温技术具有不接触、不停运、不取样、检测速度快的优点,是绝缘子运行状态在线检测的重要方法之一。文中在绝缘子发热机理和红外热像技术的原理上,立足电力工作中零值和污秽绝缘子快速检测,分别对零值绝缘子位于绝缘子串不同位置时红外测温试验对比,以及对污秽绝缘子串与清洁串的红外测温对比,试验结果表明,当绝缘子串有严重污秽和零值绝缘子存在时,其热像表征图像发生明显的突变。此外,当零值绝缘子位于串中靠近高压端时,其热像图像显示零值绝缘子与相邻正常绝缘子平均温差最大,位于中部时与相邻正常绝缘子平均温差最小,位于低压端时为高压端和中部之间,因此可利用红外测温技术通过精度较高的红外热像仪对串中零值绝缘子和污秽绝缘子快速辨别。Infrared temperature measurement is one of the important approaches to online detection of insulator operation status. In this study, the heat generation mechanism of an insulator and the principle of infrared thermal imagining were analyzed. Experiments of infrared temperature measurement were conducted for the porcelain insulator strings with a zero insulator at different position of the string, and for the polluted and clean strings. The results indicate that： ①the thermogram contains catastrophe as pollution or zero insulator exists; ②in the thermogram, the average temperature difference between the zero insulator and the adjacent insulator reaches its maximum when the zero insulator locates near the high voltage side, the average temperature difference reaches its minimum when the zero insulator locates in the middle part, and it is between the maximum and minimum when the zero insulator locates near the low voltage side. Therefore, zero insulator and polluted insulator can be identified rapidly by high accuracy infrared thermal imaging system based on infrared temperature measurement technology.

关 键 词：红外测温 发热功率 污秽绝缘子 零值绝缘子 

分 类 号：TM216[一般工业技术—材料科学与工程]