Every spring and autumn, foreign objects on power grids become a frequent issue. Kite strings, plastic greenhouse films, advertising banners, hydrogen balloon ribbons, fishing lines—these light, airborne "garbage" items can turn into time bombs once they entangle high-voltage transmission lines or railway catenary systems. At best, they cause flashover trips due to contamination; at worst, they trigger interphase short circuits and line breakage, resulting in power outages. In 2020, a 500-kilovolt transmission line in one region was wrapped by a kite string, causing two substations to lose voltage and resulting in a load loss exceeding 200,000 kilowatts. Traditional removal methods either require power shutdowns and climbing towers for manual removal—taking several hours—or live-line operations, where workers wear heavy shielding suits and use insulated rods to carefully dislodge the debris from dozens of meters above ground, posing extremely high risks.
Now, a new device has emerged that enables clearing aerial foreign objects directly from the ground: the HIZ-NT-QZY Haizhuo Laser Obstacle Removal Equipment.
The obstacle-clearing system uses an internationally standardized fiber-optic QBH output head with an electro-optical conversion efficiency exceeding 35%, controlled wirelessly via a remote controller. Equipped with a focusable machine vision zoom system, the device can clear obstructions up to 300 meters away, allowing maintenance personnel to remove foreign objects safely without needing to climb.
