Research On Line Detection Device Of Degradation Insulators In ±800kV DC Transmission Lines

Long-term operation of the insulators under the action of the mechanical load, Since the change in the internal stress of the insulating medium fatigue damage, Resulting in reduced insulation distance insulator strings.At the same time, under natural conditions,would be affected by sulfur dioxide, nitrogen oxides, particulate dust and some other factors,In the event of fog, dew, drizzle and melting ice, snow and other wet weather, in the role of applied voltage leakage current will increase. Resulting in reduced surface contamination insulator electrical performance, and ultimately will make the insulator string flashover occurs greatly increased risk of causing serious threat to the power system..In this paper, porcelain insulators for the large number of low detection accuracy, high labor intensity is detected and other practical problems. From a practical point of view of technical research, running in "safe, practical and effective" Guiding UHV transmission line maintenance as the goal, in the early to carry out basic research in technology-related jobs live on the research and development of intelligent insulator line detection mechanism. This paper describes the development and research of the research background, domestic porcelain insulators detection device, elaborated insulator cause of deterioration, insulators of degradation characteristics and detection methods. Contrast detection method, and ultimately determine the method of measuring the resistance of the insulator, the detection circuit design, simulation verify the feasibility of the detection scheme. Then using a modular approach were elaborated insulator detector mechanical structure, electrical,construction and software design. The detection device using two-finger gripper and gear lever design, ordered by controlling the rotation of the motor can be achieved on the insulator freely climbing. Electrical structure includes voltage management module, the resistance detection module, DC boost module, sampling module, communication module.Finally, the experiment proved that the device can accurately detect the deterioration of the insulators. The research project can effectively reduce the labor intensity of staff and improve the accuracy of detection, security, stability, and reliable operation as well as leading the development of live working grid has obvious economic and social benefits.Research on this subject has important practical implications for the effective detection of the deterioration of the insulator in the automation line detection methods and detection process aspects of a new breakthrough. And it reduce labor intensity and improve theaccuracy of detection, security, stability and reliable operation as well as leading the development of live working grid has obvious economic and social benefits.