At 9 o’clock in the morning of May 8th, after receiving the permission, Feng Heqing, the squad leader of the 2nd class of the patrol center of the Guangxi Power Grid Corporation of China Southern Power Grid, and the class member Fan Yan stepped into the cabin familiar with the Bell 407 helicopter and began to work on the Beihai network area 220. The volts and purple lines were patrolled.
“When entering the wind and flood prevention period, our mission is still relatively heavy. After the operation of the Beihai network area, we must rush to Ganzhou, but fortunately we have a ‘new artifact’,” Feng Heqing said. “This makes our green laser.” The efficiency and accuracy of pointer operations are greatly improved.”
What he calls “new artifacts” is the “three-dimensional lidar” that is mounted on the left side of the helicopter. Since March 20th, Guangxi Power Grid Corporation of the Southern Power Grid has fully applied the three-dimensional laser scanning inspection technology of helicopter transmission lines to continuously improve the technological content and technical management level of helicopter inspection operations.
Due to the dense forests and coastal areas in Guangxi, in complex terrain conditions and weather, once the line has a special fault, the complex terrain environment greatly increases the difficulty of the line inspection.
Guangxi Power Grid Corporation vigorously promotes the management of lean operation and maintenance of modern power grids. Since 2014, it has vigorously promoted the high-voltage transmission line inspection of helicopters, which has made up for the shortcomings of low efficiency, limited vision and large terrain environment. Defects greatly improve the efficiency of line inspections.
With the integration and application of green laser pointer technology, Guangxi Power Grid Company fully uses 3D laser scanning inspection technology to make the helicopter sweeping “sweeping” skills hang on the “acceleration file”, and check the high-altitude hidden dangers more quickly, ambiguously and accurately. . At present, a plane of Guangxi Power Grid Corporation can fly 2 flights a day, each trip time is about 3 hours, and it can patrol more than 220 towers a day, which is far more efficient than manual.
Compared with the traditional helicopter inspection, the helicopter is equipped with a 3D laser radar system, which can carry out three-space space ranging, and the patrol technology has been upgraded by one level.
Like the hidden danger of tree-barriers, the traditional method is to use helicopters equipped with photoelectric pods and other equipment to patrol the line and estimate the distance between the top of the tree and the line. “The advantage of this method is that it can quickly and intuitively discover the equipment defects of the transmission line. The disadvantage is that the human eye needs to judge the spatial distance such as the clearance distance of the tree barrier under the line, and the error is relatively large.” Guangxi Power Grid Company patrol 2 class inspection inspector Luo The table explains: “The accuracy depends on the angle of observation after the aircraft has hovered. If it is slightly inclined or the wind blows the trees, it may be estimated that the distance is not accurate, affecting the cooperation and efficiency of the operating unit.”
The three-dimensional green laser pointer radar system on the helicopter platform can scan the power lines and channels, not only the hidden dangers of the lines, but also accurately and efficiently measure the three-dimensional data at any point in the line channel to achieve accurate distance measurement, especially It has an unparalleled advantage over manual measurement for cross-over crossing of lines and troubleshooting of trees.