Real operational data analysis of photovoltaic systems: Performance, technology, and economic viability evaluation

This thesis examines the performance and sustainability of photovoltaic (PV) power plants through the analysis of the Normalized Energy Yield and Performance Ratio (PR), while also evaluating the impact of technological upgrades, maintenance practices, and risk management strategies. The assessment is based on real operational data collected from photovoltaic installations operating under different geographical and technological conditions through telemetry systems and energy production records provided by the Renewable Energy Sources and Guarantees of Origin Operator (DAPEEP S.A.). The collected data were subjected to a correction process in order to isolate the actual technical performance of the systems from external factors, such as weather variability and grid outages.By comparing system performance before and after the replacement of aging photovoltaic modules with modern technologies, the study demonstrates the positive impact of technological upgrades on energy production and the overall reliability of photovoltaic power plants. Furthermore, the thesis highlights the importance of proper system design, high-quality equipment, and well-organized operational management in maintaining high long-term performance.The study also investigates the effects of external events, including theft, grid failures, wildfires, and floods, emphasizing the strategic importance of timely maintenance and the integration of energy storage systems in enhancing the reliability, resilience, and long-term sustainability of photovoltaic projects.