Integrated Performance Diagnosis of a Utility-Scale Photovoltaic Plant
Utility-scale photovoltaic (PV) plants frequently exhibit discrepancies between measured energy production and model-based expectations, leading to uncertainties in performance assessment, operational diagnostics, and financial forecasting.
A 9.8 MWac PV plant in Colombia showed persistent underperformance, reflected in a Performance Ratio (PR) below target and an Energy Performance Index (EPI) systematically different from unity. These deviations may arise from both technical faults and modeling inaccuracies.