高压瓷质绝缘子红外检测盲区分析  

Analysis of High-voltage Ceramic Insulators Infrared Detection Blind Areas

作　　者：姚建刚[1] 张也[1] 李唐兵 彭子健 胡淋波 付强[1] 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]国网江西省电力公司电力科学研究院,南昌330096

出　　处：《高电压技术》2017年第9期2903-2910,共8页High Voltage Engineering

基　　金：江西省电力公司科技项目(52182015000P)~~

摘　　要：针对实际检测中存在绝缘子串中劣化绝缘子漏报问题,提出一种基于戴维南等效电路法的红外检测盲区计算方法。在分析盘型悬式绝缘子电压分布的基础上,着重考虑绝缘子红外检测盲区的范围并进行定量的分析。结果表明:电压分布和温度差范围是影响盲区范围大小的两大核心因素,并得到盲区范围和2者的变化曲线。根据检测盲区变化规律,提出绝缘子串分段处理,温度范围差异选择等一系列减小红外检测盲区的方法。检测盲区的确定对红外检测技术的应用有巨大的促进作用;检测盲区的减少,对发现严重劣化绝缘子,提高红外检测的准确率和减少电网故障有重要指导意义。In order to solve false negative problems of the insulator detection, we propose a method to compute the blind areas of the infrared detection by using the Thevenin equivalent circuit method.In the process of quantitatively analyzing the disc suspension insulator voltage distribution, we take the infrared detection blind areas range into consideration.The results show that voltage distribution and temperature range are two core influential factors of the infrared blind areas detection, at the same time, the variation curves between the two factors and the blind areas are also found. On the basis of blind areas variation detection data,we propose some methods to narrow blind areas such as segmenting insulator strings while detecting and choosing different temperature ranges and so on. Finding the range of blind areas will facilitate the application of infrared detection technology. Narrowing the blind areas will be of great guiding significance to the discovery of severe deterioration of the insulator and the improvement in the accuracy of infrared detection and reduction of the grid failure.

关 键 词：瓷质绝缘子 发热模型 戴维南等效 红外图像 检测盲区 

分 类 号：TM216[一般工业技术—材料科学与工程]