Modeling of an autonomous microgrid for renewable energy sources integration

The frequency stability analysis in an autonomous microgrid (MG) with renewable energy sources (RES) is a continuously studied issue. This paper presents an original method for modeling an autonomous MG with a battery energy storage system (BESS) and a wind power plant (WPP), with the purpose of frequency stability analysis. A reduced order model is developed, considering only the dominant elements in the frequency control loop. The model´s parameters are identified from experimental results, and the presented results are focused on frequency response for variable load and variable wind speed.