Photovoltaic (PV) system output electricity is related to PV cells� conditions, with the\nPV faults decreasing the efficiency of the PV system and even causing a possible source of\nfire. In industrial production, PV fault detection is typically laborious manual work. In this\npaper, we present a method that can automatically detect PV faults. Based on the observation\nthat different faults will have different impacts on a PV system, we propose a method that\nsystematically and iteratively reconfigures the PV array until the faults are located based on the\nspecific current-voltage (I-V) curve of the (sub-)array. Our method can detect several main types of\nfaults including open-circuit faults, mismatch faults, short circuit faults, etc. We evaluate our methods\nby Matlab/Simulink-based simulation. The results show that the proposed methods can accurately\ndetect and classify the different faults occurring in a PV system.
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