Cogent fault diagnosis of photovoltaic-fed single-phase supply system

摘要

The renewable power generation is being extensively used globally so as to overcome the disadvantages of traditional non-renewable sources. The variable power output from the Photovoltaic(PV) is the major concern during its interfacing with the inverter module. This problem can be overcome by connecting quasi-Z source network to obtain constant current fed to the inverter module. This paper presents a study of common occurring switch faults i.e open-circuit and short-circuits faults on the inverter module fed to motor load for the proposed topology. This application is intended for single-phase supply system implemented in the experimental laboratory. The occurrence of faults is an common threat to these facilities and study of effects of faults is necessary in order to design snubber circuits for the power switches. The simulation results of voltage and current waveforms of the proposed system are presented. The effects of faults are investigated by calculating the total harmonic distortion under normal and fault condition.