A Multi-objective Microgrid Assessment and Sizing Framework for Economic and Resilience Benefits

This paper presents an innovative multi-objective assessment and sizing framework for battery energy storage systems paired with photovoltaics for a cost-effective and resilient microgrid. In the proposed framework, we simultaneously consider i) economic benefits from bundling grid services in grid connected mode and ii) enhanced resilience by operating the microgrid in island mode upon outages of the main grid. We first develop a survivability evaluation method to quantify the resilience of a microgrid. Next, with resilience and economic benefits being formulated as two separate objectives, we develop a multi objective optimization to explore different sizing and dispatch options and generate Pareto efficient solutions to assist decision making in system design. Case studies on a real-world microgrid project in the Puget Sound Energy's system are presented to illustrate the proposed modeling and sizing methods.