In order to extend the operating lifetime of large-scale centralized energy storage and realize full life-cycle utilization of batteries
we propose a centralized shared energy storage grouping coordination control strategy considering battery state of health(SOH). First
the centralized shared energy storage operation mode for batteries with different SOH is built to break the energy sharing barrier
so that it can coordinate the power output of new energy stations and smooth out the net load fluctuation of the grid. Second
the dynamic charging and discharging safety margin is set based on the SOH of batteries
so that the group coordination control strategy for batteries with different SOH can be proposed to meet the challenges brought by the inconsistency of retired batteries in operation regulation. The simulation results show that the proposed strategy can meet the demand of grid and power plant regulation in multiple scenarios while improving the economic performance of centralized shared energy storage plants and extending the cycle life of retired batteries.
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