基于无人机的绝缘子带电零值检测技术

为提高输电线路零值绝缘子的检测效率，利用无人机装载电场探测装置可实现免登塔带电检测。文中首先建立220kV瓷绝缘子串1∶1仿真模型，通过Comsol有限元数值仿真，分析研究串型、路径抖动、无人机及电场探头对绝缘子串空间电场分布的影响；继而建立零值绝缘子识别方法及其后台检测系统；最后进行实验室及现场实测。研究结果表明：双联绝缘子串同时存在零值绝缘子时，其空间电场分布互不影响；无人机飞行过程中直线检测路径的偏移距离应小于50mm；绝缘子串的空间电场分布不受无人机及电场探头影响。利用文中所提的零值绝缘子检测方法，通过无人机搭载电场探测装置，可实现零值绝缘子的现场检测。

Live zero value detection technology of insulator string based on UAV

In order to improve the detection efficiency of zero value insulator of transmission line,the unmanned aerial vehicles (UAV) equipped with an electric field detection device can realize live detection without climbing the tower. Firstly,the 1:1 simulation model of 220 kV porcelain insulator string is established. Through Comsol finite element numerical simulation,the influence of string type,path jitter,UAV and electric field probe on the spatial electric field distribution of insulator string is analyzed. Then,the identification model and background detection system of zero value insulator are established. Finally,the laboratory and field measurements are carried out. The results show that when double insulator strings have zero value insulators at the same time,their spatial electric field distribution does not affect each other. The offset distance of straight line detection path should be less than 50 mm during UAV flight. The space electric field distribution of insulator string is not affected by UAV and electric field probe. Using the zero-value insulator detection algorithm proposed in this paper,the field detection of zero-value insulators is realized by the UAV equipped with an electric field detection device.