Power lines and equipment are important components of the power grid. They are mostly in long-term operation and exposed to nature. They are not only affected by normal mechanical loads and electrical loads, but also often exposed to external factors such as sundries, lightning strikes, and strong winds. influences. Therefore, in order to avoid line failures and ensure the safety and stability of the power system, the relevant departments actively carry out inspections, the main purpose of which is to timely discover and eliminate the factors that promote the aging, fatigue, oxidation, and corrosion of components on the lines and equipment.
In recent years, drones have been widely used in various fields. Compared with traditional power inspection, UAV power inspection has the following advantages:
1) The traditional electric power inspection process is staff on-site inspection lines. When encountering natural disasters such as snow and ice, floods, earthquakes, and landslides, inspections cannot be carried out. The application of UAV inspection can not only quickly detect the defects of transmission lines, hidden dangers of passages, but also obtain timely, accurate, and efficient field information under a variety of complex terrains, severe climates, and severe weather. In addition, UAV line inspection improves the speed and efficiency of power maintenance and inspection, enabling many tasks to be completed quickly with full power, which is dozens of times more efficient than manual inspection;
2) Fixed-wing UAVs can perform flight inspections on terrains, such as plains, lakes, and mountains. It can take advantage of the air to comprehensively and accurately check the operation of electrical lines, so it can make up for the shortcomings of manual inspections.
3) In addition, fixed-wing UAVs have the characteristics of short preparation time, fast flight speed, and long flight mileage. They are mainly used for large-scale rapid inspection of transmission lines, an inspection of line corridors, post-disaster power grid assessment, and line design survey and site selection. Wait.
The fixed-wing drone has completed the inspection of a power line in northern Zhejiang. During the period, many difficulties were overcome, such as the large scale of power line detection, the planning of the target line boundary, the high efficiency and no omission of route paths, and the influence of factors such as undulating terrain.
The specific operation process is as follows:
Airline planning: Download, map, and plan the area maps that need to be inspected through the ground station planning software Captain, and set the corresponding overlap parameters according to the focal length of the sensor lens, flight height, and project requirements.
Illustration: Ground Station
Collecting data in the field: After completing the route planning, obtain effective communication between the aircraft and the ground station, and avoid possible interference signals. After taking off, fly according to the preset route, and at the same time pay attention to the flight status of the aircraft monitored by the ground monitor to ensure the accuracy of the inspection.
Take-off inspection of fixed-wing UAV
Engineer inspecting footage on the monitor
Internal puzzle: Use Pix4D software to make orthophoto images of the collected Huzhou Power Line photos, as the basis for inspection of power pipelines.
Orthographic image result mosaic of power line photo software collected by fixed-wing drone
Analysis of results: Using data collected by fixed-wing drones and orthophoto production of internal software, it is possible to clearly detect areas where power lines have failed, added, deleted, or modified, ensuring the stable operation of the circuit and greatly reducing Inspection costs also improve efficiency.