As for such issues as increase of network loss and voltage deviation due to the grid connection of high proportion of DG (distributed generation)

a hierarchical optimal scheduling strategy for active distribution network considering energy storage system and distribution network reconfiguration is proposed. Firstly

the operation economic performance of the distribution network is considered. The upper level optimization model is constructed to optimize the total charging and discharging power of the energy storage system in each period with purpose of the goal of maximizing the peak filling effect and arbitrage profit of the energy storage system. Then

for enhancing operation reliability of the distribution network and taking the minimum network loss cost

equipment action cost and voltage deviation as the target

the lower level optimization model is constructed to adjust the network topology

optimize the reactive power output of DG and traditional reactive power compensation equipment and reasonably allocate the charge and discharge power of each energy storage device. Moreover

the whale optimization algorithm is used to solve the upper and lower level optimization model. Finally

the effectiveness of the strategy is verified by simulation in an improved IEEE 33-node power distribution system.