Application of Utility-Connected Battery Energy Storage System for Integrated Dynamic Services

The rapid uptake of renewable energy sources (RES) and displacement of synchronous generators is introducing a number of security challenges, particularly in terms of frequency and voltage stability, whose interactions in RES-dominated systems are to be fully understood yet. This paper models and discusses the application of utility-connected battery energy storage system (BESS) for provision of integrated dynamic services, i.e., simultaneous provision of primary frequency/active power and voltage/reactive power control. To investigate how BESS should respond to system contingencies, a detailed BESS dynamic model is presented along with comprehensive discussions on interaction of frequency and voltage responses and proposing suitable control signal generation algorithms. Simulation results illustrate the BESS capability to provide integrated dynamic services as proposed, highlighting the significance of response prioritization.