Decision-support model for battery energy storage system inclusion in grid-connected PV systems for medium voltage applications

摘要

This paper presents a decision-support model for grid operators to state on the possible inclusion of a Battery Energy Storage System (BESS) into an electrical feeder. Considering that this medium voltage feeder is connected to one renewable distributed generation or more, namely, a PV solar power plant. The decision making will be based on the evaluation of the technical and economic benefits of the batteries presence in such systems. In fact, the technical profit is straightly related to the energy flow management melioration and the economic one is basically reflected by the gains counted on from the electricity prices variation during the day, the battery costs deflation and the PV cells dropping expenses. The latter favor the massive integration of PV power plants in Medium Voltage (MV) distribution networks. At this point, we develop an algorithm for decision making that can be used as a tool for grid managers to support their choices in terms of BESS size and type, then, justify the corresponding investments regarding their acquisition.