In addition to emergencies, daily line maintenance and modification is perhaps one of the most common causes of power outages. Recently, Shanghai Power Grid Qingpu Power Supply Company for the first time to 35 kV transmission lines to carry out live insulation spraying operations, for the future of the city's "live replacement" to provide a sample, Shanghai citizens due to line transformation and power outage troubles will also be greatly reduced.
"Scheduling is permitted, start the live spraying operation!" Located on the side of the 35 kV Qingfeng 3603 overhead transmission line in Qingdong Farm, Qingpu District, with the order of Hua Chenjian, deputy head of the live operation team of the State Grid Shanghai Qingpu Power Supply Company, three intelligent coating robots completed insulation spraying of the overhead power wires in the running state under the coordination of the drone.
At the scene, the staff first manipulated the drone suspension tow rope, pulled up the special "upper line belt" tied to the sides of the intelligent coating robot, and accurately fixed it to the power wire more than 10 meters high through the card slot. Subsequently, the robot's built-in hoist began to tighten the "upper line belt", and the robot took off autonomously and was attached to the wire through the robotic arm.
The rollers on the robotic arm start running, and the robot travels along the wire at a speed of 3 meters per minute while uniformly spraying the wire with a layer of 4 mm thick self-curing polymer lightweight insulation material. After about 10 minutes, all three bare wires with a total length of 90 meters were draped in a new "insulating protective coat".
Fang Qi, deputy director of the transportation and inspection department of the State Grid Shanghai Qingpu Power Supply Company, said that lines like the 35 kV Qingfeng Line, due to the long operation period, the trees below grow luxuriantly, birds often nest here in the spring, and there is a hidden danger of tripping on the power wire for a long time, so insulating the line is not only conducive to the safe operation of the power grid, but also helps to protect the local ecological environment.
"In the past, such coating operations could be carried out in the state of line suspension, but the 35 kV Qingfeng line was connected to another 10 kV overhead line, so it was more difficult to transform the power outage." Fang Qi said that the blackout is the best power service, the implementation of live insulation spraying with robots can efficiently and safely eliminate the hidden dangers of line risks without affecting the normal power supply of users.
At present, Qingpu power grid is entering a period of rapid development, power supply reliability requirements continue to improve, the State Grid Offshore Power priority in the area of the pilot, the external damage hidden danger of the line section, in the way of robot live operation to carry out line insulation coating. In the future, State Grid Offshore Power is also expected to promote this kind of "live replacement" line transformation method in the city, minimize the impact of construction work on users' power outages, and continuously improve the reliability of power supply in the urban power grid.