Abstract
Extra high voltage/ultra-high voltage (EHV/UHV) transmission lines have long insulator strings, and a number of porcelain insulators. Hence, it is convenient and efficient to use an insulator detection robot. The existing insulator detection robots are mainly of a climbing style, with large sizes and complex structures. It is inconvenient to carry them up the tower, and it is inefficient to move them on the insulator strings. Therefore, a lightweight insulator detection robot with a simple structure is designed in this study. To prevent corona discharge on the robot, a 3-D model of the robot along the insulator string is established, to calculate and analyse the electric field distribution. The structure of the robot is optimized according to the simulation results. The field test of the robot is carried out on 500 kV insulator strings, and a UV imager is used for observation. The test results show that no corona discharge occurs on the optimized robot, and it can operate safely and steadily along insulator strings.
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