Distributed energy storage can

to a certain extent

suppress the fluctuation of intermittent power and play an important role in the compensation of voltage sags of regional power grid. For improving voltage stability of the power grid

in this paper

the influence of the distributed energy storage on the grid voltage is modeled after access of the distributed energy storage is modeled firstly by way of analyzing the operation mode of distributed energy storage. Then

the coordinated operation model of the distributed energy storage device is set up by way of studying the influence mechanism of distributed energy storage on the stability of grid voltage. The charge and discharge condition of each distributed energy storage system is obtained and the voltage stability of each node is maintained with minimum system voltage fluctuation as optimal objective and the charge and discharge performance of system flow and the distributed energy storage as the constraint condition as well as through particle swarm optimization algorithm. Finally

a certain regional power grid is used as an example to verify that the proposed distributed energy storage coordinated operation method can effectively improve the stable operation level of the regional power grid voltage.