Abstract
Aiming at the participating in secondary frequency modulation(FM) for energy storage auxiliary thermal power units, the advantages and disadvantages of the two control modes, Area Control Error (ACE) and Area Regulation Requirement (ARR), are analyzed, and a coordinated control strategy for energy storage batteries to participate in the secondary FM of the power system is proposed. This control strategy divides the energy storage into two operating conditions, frequency modulation and restoration. The FM conditions are based on adaptive control of the energy storage SOC, and the restoration conditions are based on ultra-short-term load prediction. The simulation results show that the control strategy proposed in this paper has advantages in improving the FM effect and increasing the utilization rate of thermal power units, and realizes the coordinated operation among the energy storage, conventional units and power systems.
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