In order to improve the efficiency of vanadium flow battery energy storage system and promote its efficient utilization

a power distribution strategy based on priority-adaptive weight particle swarm optimization（P-AWPSO） algorithm is proposed. Firstly

a multi-objective optimization model including a compromise among the loss cost

loss rate and state of charge（SOC） is proposed

as well as four indexes to evaluate the power distribution of vanadium redox battery energy storage system. Then

a P-AWPSO algorithm is adopted to solve the problem. This algorithm uses the idea of ―selecting the unit first and then distributing the power‖

in other words

the energy storage unit which can participate in the power distribution is selected firstly according to the priority

and then the power distribution is carried out in the selected energy storage unit. Finally

the algorithm is used in the simulation of two examples and compared with the traditional power allocation algorithm. The simulation results show that the strategy can realize the power distribution of the vanadium redox battery energy storage system

reduce the charge and discharge times of the battery

reduce the running cost of the battery and improve the working efficiency.