Dynamics of grid-connected photovoltaic system at fault conditions

Use of an environmentally clean photovoltaic (PV) power generation system will become more widespread in the future due to anticipated cost reduction in PV technology. As the capacity of PV systems increases, the stable output of the grid-connected PV system becomes important. However, the output variation of PV systems is dependent on the faults and transients of the power system. This paper analyzes the dynamics of a PV system at fault conditions. A 3 MW PV system is modeled by Matlab/Simulink, and then the distribution system with the PV system is modeled. This paper simulates the various fault types, and analyzes the output of the PV system at fault conditions. The results show that output of the PV system depends on the fault type.