In recent years, with the completion of large-scale photovoltaic power plants, many up to tens of thousands of photovoltaic units will fail in operation. At this time, photovoltaic UAV inspection is needed. As a gold medal partner of Xinjiang, Shanghai Boram technology has accumulated profound experience in the photovoltaic industry. What are the operation steps of large-scale PV modules and external lines? Let’s introduce it.
1. The small UAV is used to quickly establish the inspection area orthophoto.
The UAV can fly along the edge of the site by using the function of selecting points on the aircraft map of GS Pro ground station. Planning the boundary of the exit station, that is, the boundary graphics required by aerial survey. Firstly, the accurate regional geographic information is collected to provide the most basic ground information for the subsequent UAV route editing flight.
After the completion of the enclosure work, the ground station will automatically establish the aerial survey area for orthophoto acquisition. After editing the route parameters, confirm that the state of the aircraft (power, SD card capacity, task completion action, etc.) is good enough to meet the acquisition requirements, and then the automatic flight mission can be executed.
In the process of collecting orthophoto images, it is necessary to pay attention to the remaining power of the UAV at all times and return in time. The photovoltaic panel equipment is scattered and dense, and the crash may lead to relatively large losses at this time. At the same time, the UAV can use GIS modeling software Bentley (smart3d), pix4d, photoscan and so on to produce orthophoto results. At the same time of establishing orthophoto, reasonably planning time points, making a 5cm ground resolution real model, which is used for historical image data preservation and real data analysis, so as to provide one of the basis for the later construction of the power station. 2. Precise inspection of m200 series and XT thermal infrared cameras.
Wide angle lens is not recommended to be used in photovoltaic power inspection. Practice shows that the flying height of wide angle lens is too low, and the aircraft is at risk. Due to the resolution of the camera, the flying altitude is too high, which may lead to miss detection defects. It is suggested that 13 ~ 19mm lens be used in the pan tilt of infrared camera for fine inspection of photovoltaic panels. Through XT thermal infrared pan tilt camera and visible light camera, after inspecting outdoor photovoltaic panels, identify and mark some common heating causes, such as plate damage, shadow shielding, surface fouling, etc. the hot spot image can be clearly observed under the infrared image, and then switch to the visible light equipment for close observation of the faulty equipment, so that The time stamp of the camera is used to record the detailed location information and shooting time.
In the post-processing, FLIR tools can also be used to enhance the false color of the original gray-scale infrared image. More clear marking and identification, and issue relevant reports. Through image comparison and analysis, technicians found that some hot spots were caused by panel damage. 3. The photo taken by the thermal infrared camera and the visible light camera of the UAV contains POS information. When the POS information is imported into the Orthophoto Image, the photo location of the defect image can be seen. Through image comparison, it can quickly and accurately judge which PV panel and module have faults and defects. It is convenient for the operation and maintenance personnel of the power station to replace the faulty parts in time according to the actual operation and maintenance situation, so as to ensure the safe and stable work of the parts. Relying on the advantages of Dajiang gold partner, Boram technology can provide a full range of inspection services for the photovoltaic industry. The above is to introduce the content of photovoltaic UAV inspection, and the related application and operation steps are also introduced to you, hoping to help you.
Editor in charge: PJ