Coordinating Energy Resources in an Islanded Microgrid for Economic and Resilient Operation

Abstract

Microgrids with advanced management and control strengthen power system reliability and resilience. In normal operation, economy and reliability are the objectives. However, for adverse events, economy would not be the top concern and focus moves to resiliency and providing energy to critical loads. The resource dispatch strategy in normal economic mode would not be suitable for resilient mode given adverse events. In this work, an energy resource coordination strategy is proposed for a hydro–diesel-battery islanded microgrid, which improves distribution system resiliency by preevent control and switching to resilient mode from economic mode. Resiliency metric is used to verify and quantify the effectiveness of the selected strategy among available ones. Real-time resiliency management system (RT-RMS), a real time resilience management and visualization tool is developed and the resiliency driven resource coordination is integrated into it. Finally, a 14-nodes isolated power system model and a simplified 55-nodes real-world islanded microgrid model are used for validation and demonstrate the effectiveness of proposed resource coordination method.