Operation of Parallel Grid-Connected PVs Due to an Islanding Event

The growing penetration of solar photovoltaic (PV) systems in power grids has increased the opportunity of these systems' exposure to different dynamics. The objective of this paper is to study and analyze the dynamics resulted from an accidental islanding event of a 30 MW grid connected PV system. The effect of voltage source converter (VSC) control switching and the influence of initial phase selection are discussed thoroughly. Different case studies are performed to test the system performance considering resistive and inductive loads. Moreover, the effect of the resulted dynamics on sensitive loads such as rotating machines is examined. Analysis are carried out based on electromagnetic transient (EMT) simulation results using MATLAB/SimPowerSystems.