An Integrated Battery Optimal Power Dispatch Architecture for End-User-Driven Microgrid in Islanded and Grid-Connected Mode of Operation

Abstract

In this paper, an optimal power dispatch framework for a battery integrated end-user-driven microgrid is proposed that is capable of working in grid-connected and islanded mode. The proposed framework integrates a rule-based dispatch algorithm for the islanded mode that can schedule the battery considering maximum end-user flexibility, with a receding horizon based optimal dispatch algorithm for the grid-connected mode that maximizes grid stability and minimizes grid exchange power to the microgrid. The main advantage of the proposed architecture is that it enables the end-user to operate the microgrid economically (minimizing power from the grid) and at the same time ensures flexibility and grid-level reliability. To demonstrate the applicability and scalability, the proposed architecture is evaluated on a modified IEEE 33 node and IEEE 123 node distribution feeder including three-phase and single-phase connected end-user microgrids suitable for real-time implementation. The test results show that the approach is scalable and the proposed architecture improves feeder reliability and end-user flexibility, keeping overall cost to a minimum.