Abstract: Addressing the power fluctuation issues in grid-connected renewable energy generation, this paper proposes a power smoothing control technology for energy storage clusters. By establishing a renewable energy-storage hybrid system model, the characteristics of power fluctuation and storage clusters are analyzed. Furthermore, a power allocation method considering SOC constraints of storage clusters is proposed, and an adaptive control algorithm based on inter-cluster coordination is designed. Simulation results verify the effectiveness of the proposed control technology in suppressing renewable energy power fluctuations and achieving balanced utilization of storage clusters.