基于二阶一致性算法的电池储能系统SOC均衡及功率分配策略OA北大核心CSTPCD

In order to extend the overall lifetime of the energy storage system,it is necessary to keep the state of charge(SOC)of each energy storage unit in the energy storage system in a balanced state.Therefore,this paper proposes an improved droop control strategy based on the second-order consensus algorithm,which is able to realize the SOC balancing of energy storage units with different capacities fast by nesting the coefficients of variation in the exponential function.The secondary control strategy is designed on the basic of SOC balancing,which is able to achieve frequency/voltage restoration and active/reactive power reasonable distribution under certain time delay.Finally,the simulation of the battery energy storage system composed of 4 energy storage units verifies the effectiveness of the proposed control strategies.The results indicate the SOC can quickly converge to reach the balanced state,the frequency/voltage can be restored to the rated value,and the active/reactive power can be allocated proportionally.