Thermal Science and Engineering Progress, cilt.42, 2023 (SCI-Expanded)
The demand for electricity generated from solar energy in Turkey is increasing daily. For sustainability in energy, a good design, periodic operational maintenance and instant monitoring of the field all play important roles when generating photovoltaic power. Fast and on-site detection of failures in photovoltaic fields is required to ensure long-term, high-efficiency photovoltaic power generation. On-site testing of solar power systems is useful for evaluating the performance of facilities and identifying potential problems. Thermal imaging of photovoltaic modules and electrical components is the most reliable inspection method compared with other methods. In this article, thermal imaging results from eight different Turkish solar power plants (23.5 MWp in total) are reported. We found that the most common difficulties identified during field tests could be classified according to the type of failure. This experiment demonstrates the efficiency and effectiveness of the thermal imaging approach, both in terms of accuracy and processing time. Passive bypass diodes, connection failures and hot spots in photovoltaic modules and strings, abnormally exploded fuses, and panel cracking and breakage were the main causes of these failures.