Optimal Siting and Sizing for Distributed Energy Storage System in Active Distribution Networks for Peak Load Management

Abstract

With the continuous technical economy improvement of electric energy storage, it has become a trend to integrate a large number of DESSs (Distributed Energy Storage Systems) in the distribution network. In order to make full use of the battery energy storage system to delay the upgrading and reconstruction of the distribution network, a comprehensive optimization method of selecting the site and capacity to participate in the peak load regulation of distribution network is proposed. In the proposed method, a bilevel planning model is built where the upper layer model is the capacity configuration model, which considers the investment income of DESSs and delaying the expansion and upgrade of the distribution network; whereas the lower layer model is the installation spot optimization model, which considers the characteristics and capacity limit of DESSs, and the load regulation for peak-load shifting. The validity of the proposed method is verified by the IEEE 33-bus system. Simulative results show that, the proposed comprehensive optimization method is suitable for different application scenarios with the integration of DESSs of different capacity configurations and different installation spots and can provide a technical support for the planning and managing of largescale DESSs accessing to the distribution network.