With the rapid development of power grid construction, The Power grid is becoming more and more expansion; the reliability of the equipment operation is the important precondition for the safe and stable operation of power grid. The insulator is an important component of the primary equipment of the power grid. So it is important to research high efficient, accurate equipment to detector the insulativity of insulator. This paper is based on current problems of insulator detection, An online insulator detection device based on intelligent robot is studied. By installing the equipment onto the robot, the robot will be able to detect online. There is no need for artificially high screening tests to reduce the worker's strength. The DC ultrahigh-voltage transmission line is the latest transmission. The research on these insulators is scant. Through the experiment, device for detecting the insulator resistance was developed. Through experiment, proved the feasibility of this approach.

With the problem of charged insulator zero detection in UHV transmission line has become increasingly prominent, In this paper, We take the UHV transmission line as the background to design and develop a kind of insulator detection robot based on STM32, which can realize the automatic detection of insulator chain, this paper mainly introduces the electrical system design and mechanical design of insulator detection robot. The insulator detection robot greatly improves the efficiency of insulator detection and automation of power operation and maintenance, reduces the cost of manpower operation and creates higher economic and social benefits.

Detecting the low value insulator in the insulator string on-line is of great significance to the safe and stable operation of power system. It is one of the most important technical problems in the construction of HVDC transmission project in our country. At present, there are many researches on HV AC insulator strings both at home and abroad, but HVDC is the only mode of transmission recently used, and there are few researches on this kind of transmission lines. In view of this new problem, after a number of our research design, invented a DC insulator for high voltage zero line detection device, the detection device can effectively detect low and zero value insulators, and through the wireless data transmission system for realtime measurement of insulator shows low value zero data, then the data can be playback and the backup test results.

In recent years, with the vigorous construction of the ultra-high voltage grid, the line operating voltage level has become higher and higher. In order to ensure the safe operation of the transmission line, the line insulator string has a length of several tens of meters, and traditional manual testing has been unable to meet the requirements. With the continuous maturity of wireless communication technology, electromagnetic compatibility technology, sensor technology and other comprehensive technologies, it is necessary to develop an insulator string detection robot to replace artificial insulator detection work on UHV transmission lines. By means of wireless sensor communication technology, electromagnetic compatibility technology, video image technology and many other technologies, the insulator detection robot designed in this paper has realized automatic detection of zero resistance value of insulator of UHV transmission line. In addition, the real-time monitoring of insulator resistance value can be carried out through wireless communication to achieve the purpose of timely alarm. In addition, the robot's motion status and the insulator's field status can be observed in real time through video image acquisition. The insulator detection robot designed in this paper realizes the automatic detection of the zero value of insulator of the UHV DC transmission line. It can adapt to the UHV AC DC transmission line with different voltage levels by changing the length of the climbing arm, and at the same time adapt to the climbing detection of the string insulator of tension tower and the vertical insulator of the straight tower. The problem that the insulator string of the UHVDC transmission line can not be automatically detected by electric charge has been solved. It greatly improves the efficiency of insulator detection and the automation level of power transportation maintenance, reduces the cost of human transportation, and creates higher economic and social benefits.