Operational Strategy Based Evaluation Method of Distributed Energy Storage System in Active Distribution Networks

Abstract

Abstract Distributed energy storage system (DESS) is an effective way in adapting to increasing penetration of distributed generations (DGs) and will play an important role in the operation of active distribution networks (ADNs). However, the high capital cost and limited life cycles restrict the further development of DESS. In this paper, an operational strategy based method for economic evaluation of DESS is proposed. Firstly, rate of return is set as the economic evaluation index. Then, the economic operation model is established. By applying convex relaxation, the original nonlinear programming (NLP) model is converted into an effectively solved second-order cone programming (SOCP) model. Finally, the effectiveness of the economic evaluation method is verified on the modified IEEE 33-node test feeder.