Processor-in-the-loop simulation of parallel connected single phase i̇nverters in islanded microgrids

In this thesis, a droop control method based on active and reactive power sharing of parallel-connected single-phase inverters in islanded microgrids and a Processor-in-the-Loop (PIL) simulation is presented. The droop control method is one of the most suitable choices for wireless control of parallel connected inverter based Distributed Generators (DGs). However, since the impedance of distribution lines is highly resistive, the traditional P-ω and Q-E droop control method provides poor power sharing in islanded microgrids. Therefore, in this study, P-E and Q-ω droop control method has been chosen for single-phase inverters operating in parallel. In addition, under the control of these inverters, there is a current control loop and a voltage control loop in order to follow the reference voltage obtained from the droop control. In addition, these inverters have a current control loop and a voltage control loop in order to follow the reference voltage obtained from the droop control. Finally, PSIM and PIL simulation results are presented to demonstrate the traditional and improved P-E and Q-ω drop-based active and reactive power sharing performance between two 2.5 kVA single-phase inverters connected in parallel.