Abstract: As the proportion of renewable energy increases, the newly installed energy storage stations in power system become the important means to improve the frequency stability of the power system. Aiming at the stable operation of the distributed energy storage stations (DESS), we propose a coordinated control strategy in which the state of charge (SOC) consensus is taken into consideration. Firstly, the frequency regulation model of regional power system with DESS is constructed, based on which the characteristics of conventional frequency regulation strategy is analyzed, and the frequency regulation and consensus demands with high penetration rate of renewable resources are discussed. Then, the coupling relationship between the demands of frequency regulation and SOC consensus adjustment is analyzed, and the distributed SOC control method is designed based on the consensus algorithm, which forms the coordinated primary frequency regulation strategy. Besides, the key control parameters are analyzed with the designing principle and value determination. Finally, the typical regional power grid model is built, with which the simulation verification is performed under different frequency fluctuation conditions. The simulation results show that the proposed strategy can effectively improve the frequency performance, realizes the SOC consensus of DESS under the premise of not increasing the system frequency regulation burden, and reduces the SOC out-of-limit risk with the enhancement of aggregation control effect of the DESS cluster.