Fault Current Limiter-Based Protection Scheme in a Standalone Photovoltaic Battery-Based Nanogrid

A short circuit on the converter terminals is the most common type of issue that can be faced in a PV-battery energy storage system (BESS) connected residential DC nanogrid. These kind of faults can be damaging if not correctly limited within the tolerable range of the converter which is generally two times of the nominal current that a converter can carry. This paper presents a study and the analysis of the fault current characteristics of a PV–BESS system with and without the usage of a fault current limiter (FCL). The paper also presents the comparative study with and without impact of FCL under different operating scenarios, and it is being analysed that the fault current decreases significantly in the case of FCL with that of without FCL.