Active distribution network expansion planning integrated with centralized and distributed Energy Storage System

A multi-stage Active Distribution Network (ADN) planning model that integrated with the application of Energy Storage System (ESS) is presented in this paper. Both the longterm investment cost and short-term operation conditions of ADN are considered in the proposed model. The benefits of power supply reliability improvement brought by ESS in the ADN are also included. In each planning stage, the operation conditions are divided into several typical-day scenes and an extreme scene based on the load prediction data. The long-term expansion planning decisions including replacing and adding circuits, building up ESS, the short-term operation strategies of the ADN about charging and discharging ESS are optimized together in the model. The benefits of ESS, such as peak load shifting and power reliability enhancement are discussed based on some numerical cases, in which the centralized or distributed ESS become the options of ADN construction. Thus, the effectiveness of the proposed model is also demonstrated.