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.