Parallel operation of virtual synchronous generators and synchronous generators in a microgrid

Aiming for integration of a large-scale of distributed generators (DGs) such as photovoltaic into the microgrids, the virtual synchronous generator (VSG) control concept has been developed. By this concept, DGs based on inverters can exhibit the characteristics of synchronous generators (SGs) such as the inertial, damping, and droop functions and can participate in the microgrid control and stability. Here, a detailed VSG model is presented and analysed in order to investigate that, VSGs have really the similar structure of SGs. Then, the paper studies the microgrid with both VSG and ordinary SG. Then, parallel arrangements of VSG-VSG are set up in order to compare the dynamic behaviour of the VSG with the standard SG in an isolated microgrid. The dynamic responses are compared under equal sharing and proportional sharing of the load demand. Simulation results are presented using matlab/simulink