The incident originated on the 1st of this month. The Dongguan Power Supply Bureau received a request for support: Low temperatures continued in some parts of Shaoguan, and high-voltage lines and ground lines in the mountainous areas were severely frozen, which could endanger power supply safety. The “Ice Melting Squad” immediately set off, and they were equipped with a Spitfire rotor drone and a laser gun. The former has a 500-ml “magazine” loaded with gasoline, which can spit out fire tongues; the latter is a laser pointer barrier remover independently developed by Dongguan Power Supply Bureau, with a power of 260 watts, which can accurately cut and ignite at a distance of 100 meters object.
At the scene, the situation was worse than expected: the local 220 kV Guantong line and the 110 kV Damei line were the most icing, and the overall thickness of the ice shell in the section reached 12 cm. The “Ice Melting Squad” immediately set up a laser gun in the snow, and a continuous stream of high-energy beams penetrated the ice shell. After 8 minutes, the 12 cm thick ice shell was cut. Afterwards, with the buzzing of the propeller, the rotorcraft drove up and blew flames near the ground.
After 5 minutes, the ice shell has melted successfully! Yesterday, Yang Ting, head of the Transmission Management Office of the Dongguan Power Supply Bureau, said that the above-mentioned new de-icing technologies are the first applications in the power industry. “In the past, the ground wire de-icing mainly relied on manual labor, which was not efficient and had certain risks. Because the conventional ground wire is not energized, the icing will be more serious, and DC ice melting operations cannot be performed. Field tests of laser guns and drones laser pointers application.