Frequency Regulation Strategy for User-Side BESS Based on Estimated and Corrected Droop Coefficient

The multiplexed application of user-side battery energy storage systems (BESSs) in energy arbitrage and frequency regulation is regarded as an effective way to improve its economic profits. However, the strategy under the multiplexed mode of BESS faces the dual challenges of dynamic resources allocation and random frequency deviation signal. To pursue maximum daily profits and reliable operation of BESS, this paper proposes a frequency regulation strategy based on the estimated and corrected droop coefficient, and forms a scheduling result with the arbitrage power, the droop coefficient and the capacity compensation coefficient. The simulation results show that the strategy achieves the optimal allocation of BESS resources totally avoiding the over-capacity, so that the maximum profits and the continuously available frequency regulation capability are guaranteed.