Recently, China Southern Power Grid Corporation successfully applied the new technology of airborne laser pointer radar to the helicopter inspection of the main grid line of the West-East Power Transmission. The accuracy of the line obstacle ranging from visual estimation to centimeter level has improved the efficiency of the aircraft patrol. %. Up to now, the laser radar scanning work of the 5842.304 km transmission line of the main grid of the West-East Power Transmission has been completed. It is expected that the full coverage of the main grid line of the West-East Power Transmission in Guangdong and Guangxi will be realized in the first half of the year.
It is understood that the traditional ground manual line ranging requires a lot of manpower and material resources to master the whole line of the line, and is affected by factors such as the accuracy of the ground handheld equipment and human error, and it is difficult to obtain the data such as the clearance distance and the wire sag under the wire. The large amount increases the difficulty of channel accident prevention. Previously, the helicopters that patrolled the main grid of the West to East were only visible light scanning and infrared scanning. The line patrol personnel could only rely on the naked eye and rely on experience to estimate the distance of the offline obstacles from the transmission lines, and could not obtain quantitative data. There are problems of inaccurate measurement and large randomness of measurement data, which cannot effectively prevent and control the risk of electric power accidents such as line trips and forest fires caused by obstacles under transmission lines.
To this end, China Southern Power Grid Corporation developed a three-dimensional laser pointer radar system, and integrated on the helicopter patrol visible light, infrared pod equipment based on the helicopter line “visible + infrared + three-dimensional laser radar” three-in-one scanning mode. Helicopters equipped with a 3D laser radar system can take video of the corridor corridor, construct a 3D model to monitor the vegetation and buildings under the line, and upgrade the traditional 2D plane photos into 3D stereo images with clearer images. At the same time, the distance measurement accuracy of the 3D laser radar system is controlled to the centimeter level, which can more accurately measure the distance of the tree from the wire, effectively avoiding the inaccuracy of the traditional visual measurement, and greatly improving the type and efficiency of the helicopter patrol data collection. According to estimates, the single patrol range of helicopters using this new technology can be equivalent to one patrolman’s three-month ground patrol workload, which ensures the safe and stable operation of the main grid of the West-East Power Transmission from a technical level.