Aggregated energy storage for power system frequency control : a finite-time consensus approach

Wang, Yu and Xu, Yan and Tang, Yi and Liao, Kai and Syed, Mazheruddin H. and Guillo Sansano, Efren and Burt, Graeme (2018) Aggregated energy storage for power system frequency control : a finite-time consensus approach. IEEE Transactions on Smart Grid. ISSN 1949-3053

[img]
Preview
Text (Wang-etal-TPS2018-Aggregated-energy-storage-for-power-system-frequency-control)
Wang_etal_TPS2018_Aggregated_energy_storage_for_power_system_frequency_control.pdf
Accepted Author Manuscript

Download (1MB)| Preview

    Abstract

    In future power systems, widespread small-scale energy storage systems (ESSs) can be aggregated to provide ancillary services. In this context, this paper aims to integrate energy storage aggregators (ESAs) into the load frequency control (LFC) framework for power system frequency control. Firstly, a system disturbance observer is designed to supplement the secondary frequency control, where the ESA can respond to the estimated disturbance and accelerate the system frequency recovery. Then, within the ESA, a finite-time leader-follower consensus algorithm is proposed to control the small-scale ESSs via sparse communication network. This algorithm ensures that the ESAs can track the frequency control signals and the state-of-charge balancing among each ESS in finite-time. The external characteristics of the ESA will resemble to that of one large-scale ESS. Numerical examples demonstrate the convergence of the ESA under different communication graphs. The effectiveness of the entire framework for power system frequency control is validated under a variety of scenarios.