Proactive Generation Redispatch Strategy Considering Unavailability of Renewable Energy Sources during Hurricanes

This paper proposes a proactive generation redispatch strategy to enhance operational resilience of power grids against hurricanes considering unavailability and forced outages of renewable energy sources during these events. Previous resilience enhancement strategies focus on utilizing available generation resources to enhance the performance of power grids during extreme events without proactively preparing the system for predicted events. Recent incidents have shown that unavailability and forced outages of renewable energy generation during extreme weather events can lead to catastrophic failures yielding the need to extensive assessment of resilience of power systems with high penetration of renewable energy generation. Due to spatiotemporal characteristics of extreme weather events, changing system conditions, and rapidly varying component statuses, system operators need to initiate proactive and preventive actions to avoid severe system operating conditions. In this paper, a multi-objective mixed integer linear programming problem is formulated to minimize operational costs as well as the amount of load curtailments considering behavior of renewable energy sources during hurricanes. Operational generation constraints (e.g., ramping rates, minimum up/down times, start-up/shut-down generation costs), transmission constraints (e.g., line capacity, line availability), and other system constraints (e.g., load variation, weather variation) are considered for realistic representation. The proposed strategy is tested on a modified version of the IEEE 30-bus system under diverse impact levels of a hurricane. The results show the effectiveness of dynamic generation redispatch to improve power system resilience during hurricanes.