Abstract
In recent years, unmanned aerial vehicle (UAV) inspection has become one of the main means of daily operation and maintenance of overhead transmission lines. Since the key components of the UAV inspection system are composed of electronic components, it relies on data communication to realize data link transmission. In the actual operation process, the complex electromagnetic field environment has an obvious impact on its control and communication performance, especially when inspecting near the DC line. In this paper, combined with the research on the safety assurance technology of UAV inspection operations, the electromagnetic field simulation model of the UAV inspection operation on DC transmission lines is established. The electromagnetic field distribution around the wire is analyzed when the UAV is at different inspection distances, and the influence range and degree of the DC electromagnetic field on UAV inspection system are obtained. A true test platform for the inspection safety distance of the ±500 kV line UAV inspection was built, and the inspection safety distance test and research of the small rotary-wing UAV with a typical size, structure, and material was carried out. Through the test, when the current of the transmission line is 3 kA, the minimum safety distance of the UAV inspection operation of the ±500 kV DC transmission line straight tower is 3 m, and the distance is corrected in combination with the current. The research results of this paper can provide technical support for the inspection operation of small multi-rotor UAVs on ±500 kV transmission lines.
Highlights
Transmission lines cover a wide area, the terrain across the area is complex, and the natural environment is harsh
unmanned aerial vehicle (UAV) inspection can visually detect the operation of the transmission line equipment, which greatly improves the quality and efficiency of the inspection operation
The tower has a significant influence on the spatial electric field distribution
Summary
Transmission lines cover a wide area, the terrain across the area is complex, and the natural environment is harsh. Under special terrain and meteorological conditions, manual inspection is difficult; it is difficult to find defects above the cross arm of the transmission tower, and the inspection efficiency is low. The operators use the ground station and remote control handle to control the task equipment and patrol and inspect the inspection targets.. The operators use the ground station and remote control handle to control the task equipment and patrol and inspect the inspection targets.5,6 This method can effectively reduce the occurrence of accidents, but it is difficult to maximize the advantages of UAV dexterity and high efficiency. The safety distance test is carried out by using the UAV model and the real UAV inspection system, and the minimum safety distance for UAV inspection operation of the ±500 kV transmission line straight tower was obtained
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