Foreign object clearance has always been a challenging issue in the operation and maintenance of high-voltage power grids and railway catenary systems. A single kite, piece of plastic film, or branch can trigger power outages, train delays, or even safety accidents. Traditional methods—either de-energizing towers for manual removal or blocking entire lines—are high-risk, time-consuming, and costly. The introduction of laser-based foreign object removal devices has completely transformed this situation.
Previously, clearing obstructions on power lines required 4 to 6 hours of power outage and at least five workers climbing transmission towers. This not only compromised power reliability but also exposed personnel to dual risks of electric shock and falls. Laser-based removal systems now enable "operation without power interruption, no tower climbing, and rapid response."
State Grid Kuitun Power Supply Company removed plastic film wrapped around vibration dampers in just 40 minutes—an efficiency increase of over 80%. State Grid Lanzhou Power Supply Company cleared tree obstructions using remote-controlled, single-person operations without power shutdowns, reducing manpower by 60% and costs by 70%. Maintenance staff in Zunhua, Hebei, have vividly nicknamed it the "laser cannon"—setting up equipment on the ground, locking onto targets via high-definition cameras, and precisely ablating foreign objects.
Technically, the 1064 nm wavelength laser is highly absorbed by non-metallic debris while being strongly reflected by metal conductors, ensuring physical-level clearance without damaging the power lines. In 2025 alone, State Grid Kuitun employed this technology to clear 23 foreign objects, cumulatively avoiding 138 hours of power outages.
For railways, the challenges are even more urgent—catenary obstructions directly cause train delays, affecting thousands of passengers. Traditional methods require line blockades and elevated work, taking over 20 minutes per incident. Xi'an Power Supply Section cleared plastic bags entangled on the Longhai Railway line in just six minutes, achieving a fivefold efficiency improvement. Data from Xiangyang Power Supply Section shows that laser removal reduces labor by 70% and increases efficiency fourfold, enabling "zero contact with wires, zero power outages, and zero damage."
Why is it so effective? Three words: safe, efficient, and uninterrupted operation. Whether in power grids or railways, the core value of HIZ-NT-QZY, the remote laser foreign object removal system developed by Guangxi Haizhuo Technology, remains consistent:
Safe: Workers avoid climbing heights and direct contact with high voltage, eliminating risks of electric shock and falls.
Efficient: Power grid operations drop from several hours to minutes; railway clearance reduces from half an hour to 5–8 minutes.
Uninterrupted: No power outages in grids, no train stoppages on railways, ensuring reliable power supply and passenger travel experience.
From power grids to railways, from highways to photovoltaic power stations, laser-based foreign object removal systems are redefining dangerous maintenance tasks—one beam of light at a time.
