Battery Energy Storage System Model for Frequency Support in Power Systems

The operation and planning of electric power systems are supported by continuous studies based on models. However, the fast evolution of the system topology with the integration of green technologies has brought challenges to the classical representation of each component. In this paper, a model to characterize the operation of battery energy storage systems for frequency support is proposed. This representation considers a positive sequence model of the voltage source converter which permits to regulate the exchange of real and reactive powers. Thus, it is possible to interact with a classical electromechanical representation of synchronous generators, and also with turbine-governor, and power support based on battery energy storage systems for large-scale power systems. To verify the scope of the proposed model, the equivalent New England power grid is evaluated. Simulation results with the proposed strategy are compared with the classical dynamic representation of synchronous generators for frequency stability studies. Severe changes of load and generation are analyzed to demonstrate the proposed model applicability.