With the development of urban and rural construction, the geographical environment in which transmission lines are located has undergone significant changes, and the factors affecting the safety of the power grid are gradually increasing. In recent years, hanging objects such as kite string, plastic film, canvas, advertising banners, and remnants of fireworks and firecrackers have become one of the serious hazards of high-voltage transmission lines. They are entangled and suspended on wires, which can easily cause single-phase grounding, phase to phase short circuits, and other faults in high-voltage transmission lines. In severe cases, they may also cause large-scale power outages in the power grid. Therefore, it is necessary to promptly remove these foreign objects.

Traditional methods for removing suspended foreign objects include contact based methods, power outage operations, or live line operations. The use of post power outage maintenance personnel to handle power outages not only increases the frequency and duration of power outages, but also causes huge economic losses to enterprises and society. Nowadays, many provinces and cities are committed to the research of methods and equipment for handling equipotential live working, and have developed methods for handling charged foreign objects such as blowtorch combustion, rope hanging, equipotential soft ladder, operating rod removal, and insulated bucket arm vehicles. However, these methods belong to mechanical contact methods, and machinery or maintenance personnel need to come into contact with power transmission and transformation equipment, which has a certain degree of destructive power to the line. Personnel and equipment entering the strong electric field of the transmission and transformation equipment's conductors and ground wires pose a high safety risk.

Using laser as energy, the laser beam emitted by the laser foreign object removal device on the ground is used to irradiate the foreign object, forming a laser ablation (or cutting) zone on the foreign object. The entire foreign object is ablated or divided (or cut) into fragments (or segments), achieving non-contact charged removal of non-metallic foreign objects such as kite string, plastic film, canvas, advertising banners, etc. suspended on high-voltage transmission and transformation equipment. The long-distance non-contact high-voltage transmission lines, where operators do not enter high-voltage electric fields and equipment does not come into contact with high-voltage transmission lines, have important theoretical significance and significant engineering practical value in improving the reliability of power supply for transmission lines and ensuring the safety of maintenance personnel.

The laser grid clearing device uses laser as energy to irradiate foreign objects on the ground with a laser beam emitted by a laser foreign object removal device, forming a laser ablation (or cutting) zone on the foreign object,

To achieve non-contact charged removal of non-metallic foreign objects such as kite strings, plastic film, canvas, advertising banners, etc. suspended on high-voltage transmission and transformation equipment by burning or dividing (or cutting) the entire foreign object into fragments (or segments).