基于虚拟直流电机的多储能SOC均衡控制策略OA北大核心CSTPCD

Droop control is commonly used in DC microgrids to maintain a reasonable distribution of power between DC microsources and ensure the stable and safe operation of DC microgrids.However,the traditional state-of-charge balance-control strategy based on droop control causes problems such as bus voltage drop and unreasonable system power distribution owing to its characteristics.Therefore,a multi-energy storage state-of-charge balance-control strategy based on virtual DC motor control is proposed.First,the virtual DC motor control is combined with adaptive droop control.A virtual DC motor control is used to provide additional inertia and damping support to the system,reduce the bus voltage drop,and improve the transient stability of the system.Second,the state-of-charge balance strategy based on improved adaptive droop control is used to achieve the state-of-charge balance between multiple sets of batteries and a reasonable distribution of system power.The control strategy was verified using a simulation model of a photovoltaic multi-energy storage DC microgrid and an experimental platform.The results demonstrate that the proposed control method can reduce the influence of power fluctuations on the DC bus voltage and balance the state of charge among multiple sets of batteries.