Photovoltaic power station UAV inspection system solution

The solar photovoltaic power generation system is mainly divided into centralized and distributed. The centralized power station generally covers a large area, most of which are built in the northwestern part of China and some remote areas. The natural environment is relatively bad. The distributed power stations are generally built on roofs, greenhouses and large-area pools. on. However, these photovoltaic power plants have brought a lot of operational and maintenance pressures after grid connection, such as conventional equipment testing and photovoltaic panel inspection. The traditional operation and maintenance method adopts manual inspection, which is inefficient, and most of them are based on the experience of operation and maintenance personnel to identify equipment failures, which are highly prone to deviation. At the same time, in the harsh natural environment of remote areas, the inspection work of photovoltaic power stations is very difficult and dangerous. For photovoltaic areas such as agricultural light complementary, fishing light complementary, rooftop power stations, traditional manual inspections can no longer meet the demand, and it is impossible to achieve safe and efficient PV inspection purposes.

1. Program objectives

The drone is equipped with a visible light camera, a thermal infrared sensor or an EL detecting device, and collects visible light, thermal infrared image or EL data of the photovoltaic component to realize intelligent inspection of the drone, and improve the efficiency and safety of the photovoltaic inspection. The visible light and thermal infrared images are stored in real time and can be quickly exported to the pc end. The UAV intelligent diagnostic software is used to intelligently process the thermal infrared image and the visible light image collected by the drone to realize the component non-power generation detection, dust and dirt blocking, Automated diagnosis and localization of hot spots caused by failure of components such as cracks. Greatly improve the inspection efficiency of the photovoltaic power station and the accuracy of fault diagnosis.

2, drone inspection system

The UAV inspection system includes four parts: the UAV system , the data acquisition system, the ground intelligent control system, and the data analysis and processing system. As shown in Figure 3-1:



Figure 3-1 UAV inspection system

2.1, UAV system

The UAV system is equipped with an ultra-long-time, industrial-grade multi-rotor U100 with IP56 protection and the latest DJI A3 flight controller with fully optimized attitude analysis and multi-sensor fusion algorithms for precise and reliable integration. High-definition image transmission, real-time view of the camera screen, transmission distance of up to 5 kilometers, picture transfer quality 720P; built-in intelligent battery management system, real-time monitoring of remaining battery power, the system will automatically analyze the calculated amount of return and landing power and Time to avoid the danger caused by insufficient power. At the same time, the 20-minute fast charging function can be realized, and the battery can be fully charged in a short time. The system parameter table is as follows:

Project	Parameter
Flight platform	M6
Shaft distance	805 mm
Maximum load weight	4.5kg
GPS hover accuracy	Vertical: ±0.5 m; level: ±2.5 m
Maximum rising speed	5 m/s
Maximum falling speed	3 m/s
Maximum speed	18m/s
Maximum wind speed	10 m/s (sixth level)
Maximum flight time	50min

Figure 3-2 UAV System M6

2.2, data acquisition system

The data acquisition system includes visible light collecting obstructions, dust covering conditions, and infrared cameras collecting hot spots. The visible light integrated PTZ camera X5 and the thermal infrared integrated PTZ camera XT are separately arranged. The X5 combines a new image sensor with a powerful processor to capture 4K/30p video and 16 megapixel photos. The XT thermal imaging camera uses a range of FLIR proprietary technologies to reflect subtle temperature differences and make the target clear at a glance. The system parameter table is as follows:

Project	Parameter
Visible light camera	X5
Pixel	16 million pixels
Photo maximum resolution	4096x2160
ISO range	100~25600
Video resolution	4K
Video format	MP4/MOV
Thermal infrared head camera	XT
Resolution	640 × 512
Mirror head	19 mm
Minimum focal length	15.3 cm
Scene range (high gain)	-25°C to 135°C
Scene range (low gain)	-40°C to 550°C
Point temperature measurement	Center 4×4 temperature measurement
Storage	Micro SD card
Photo format	JPEG, TIFF
Video format	MP4

Figure 3-3 Visible Integrated PTZ Camera X5

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