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PV module is a device that directly or indirectly converts solar radiation energy into electric energy through photoelectric effect or photochemical effect by absorbing sunlight. Cracks, hot spots, and PID effects are three important factors that affect the performance of PV modules. Thermal camera is an indispensable tool in the process of PV module detection.
1. Thermal cameras can visually show temperature distribution with obvious fault points
Thermal cameras automatically capture the hottest spot on the screen or in an area to accurately visualize and locate problems. This helps engineers ascertain the root causes of faults to formulate a solution quickly.
2. Thermal cameras feature a remote and non-contact detection without changing the target’s structure
Thermal cameras feature a non-contact mode of temperature measurement and do not affect the surface temperature of the object being measured or electricity generation efficiency. PV modules can be inspected without the need to power them off
3. Alarm function and messages of abnormality alarms
High and low temperature ranges can be set for thermal cameras. When the temperature reaches the set range, an alarm will be triggered, reminding the staff to carry out further inspection or maintenance.
Thermal cameras can be used to detect the heat of each cell of the module. Normally, the temperature distribution of cells is even. If the temperature of a cell in the module matrix is unexpectedly high, there may be a problem with it. This indicates that the cell has changed from converting solar energy into electric energy to consuming electric energy as the load of the cell module. It causes heat rise and affects the conversion power of the entire cell module. Hence, the cell with a too high temperature has to be replaced.
Intelligent functions
Intelligent shooting: support of secondary analysis of videos/photos
Isotherm-based detection: easy identification of color blocks with high temperatures
Report generation in batch: lower data processing cost
Intelligent diagnosis: quickly providing defect diagnosis basis
M300/600 Handheld Thermal Camera
Check clearly, solve quickly
Manual focus: assisting in distinguishing small targets
Dual-spectrum fusion: easier to observe complex environments
Intelligent high and low-temperature alarms: assisting in timely troubleshooting
Wi-Fi transmission: instant sharing of temperature data
IV. Software Solution
IRPT-TAS Measured Temperature Analysis Software for Handheld Thermal Cameras
1. Real-time online preview, and various measurement tools, such as points, lines and frames
2. Alarm image capture, photo taking, video recording and other functions
3. Cloud platform function; the cloud-based file data upload, storage, and download
4. Local storage function; query of historical data and generation of temperature-time curves
5. Secondary analysis; export of the temperature data and images of ROI
