Coordinated Control Strategy of Energy Storage Systems in Distribution Network with the Integration of New Energy

With the purpose of improving the ability of power grid to incorporate new energy, the coordinated control strategy of the battery energy storage systems in the distribution network with the integration of new energy is studied in this paper. An optimization model is built by considering of the active power fluctuation of power grid and voltage fluctuation on the access points of new energy, and the NSGA-II algorithm is used to solve the Pareto non-dominated solution set to achieve coordinated control of multiple energy storage systems. By using this control method, the distributed energy storage systems can be jointly dispatched to stabilize the active power fluctuation of distribution network, to improve the voltage fluctuation on access point of new energy, and to enhance the stability of the power system. In this paper, the analysis case of IEEE14-node distribution network is studied, which incorporates PV-storage and wind-storage systems with capacity close to half load. The joint dispatching of energy storage systems with PV or wind power generations are taken to control power output of the system. In the end, by comparing the effects of individual control and coordinated control of energy storage systems in a complete scheduling cycle, the effectiveness of the proposed strategy in this paper is demonstrated.