محمدامين پورموسوي

Abstract: The analysis of the small-signal stability of large-scale power systems is well stablished, but still for inverter based microgrids there is a need to establish more systematic studies on the subject of microgrid modeling and model reduction. High penetration of renewable resources is one of the main characteristics of microgrids and voltage source inverters (VSI) are integrating these renewable resources into microgrid. Thus small signal stability study of inverter based microgrids is a vital tool for the understanding roles and effects of each microgrid component and also for determining microgrid operation limits. In this report a new systematic approach for model order reduction of autonomous inverter based microgrid is proposed. At first a review for previous established works for inverter based microgrids is provided and then the most established framework for the modeling of microgrid is chosen. Based on the chosen framework, Microgrid is divided into three sub-systems: inverter, network and load. an‎d then for each sub-system, small signal equations are provided and then all this subsystem are combined together to obtain complete system model. an‎d then for this complete model reduced order model is proposed. Then this proposed model will be verified via the case study and by comparison of proposed model’s obtained result and detailed model results. Finally conclusions and suggested future studies are mentioned. Keywords: Inverter based Micrigrid, Small Signal Stability, Small Signal Model, Microgrid Modeling, Droop Control