Although solar photovoltaic modules have been rigorously tested during the production process, they are inevitably damaged during transportation, installation and operation. For example, solar panels are cracked or broken. If they are not replaced in time, system efficiency will be greatly reduced. , or even cause the system to fail.
The current monitoring methods mainly include the thermal imaging photographic technique and the (electro) field excitation luminescence detection technology, but each has a large application restriction condition. The thermal imaging photographic technology can only be used in sunlight with an optical energy density of more than 700 W/m2. Used under conditions, and field-excited luminescence detection techniques can only be used under nighttime low-light conditions.
The Institute of Photovoltaic Technology, University of Stuttgart, Germany, has collaborated with companies to develop a new monitoring technology called “DaySyâ€. This new technology enables the real-time monitoring of solar photovoltaic devices by measuring the intensity of field excitation and photoexcitation of solar photovoltaic modules. In the working state, the monitoring results can be obtained within 30 seconds to determine whether the solar PV module is in good condition and determine the common fault types, such as the loss of the wires between the solar panels, the occurrence of micro-cracks on the board, and the photoelectric conversion failure of the panels. The parts, etc., have a wide range of application prospects.
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