Testing, Analysis and Diagnostics of Chosen Faults of Photovoltaic Systems

The paper is focused on the analysis and detection of faults of photovoltaic (PV) elements, especially PV modules, and their impact on the reliable operation of the photovoltaic system. Brief overview of currently used measurement techniques and methods in photovoltaic diagnostics is introduced. The consequences for the safe and reliable supply of electricity from the PV system were demonstrated on silicon photovoltaic modules by modelled faults and evaluate them using selected diagnostic methods. The influence of respective defects and environmental impact was demonstrated using current-voltage (I-V) curves, impedance spectroscopy and thermography. The aim was not to quantify the deterioration of measured samples, but to demonstrate chosen methods and their potential.