Proactive Generation Redispatch to Enhance Power System Operation Resilience during Hurricanes

Abstract

This paper proposes a proactive generation redispatch strategy to enhance the operational resilience of power grids during hurricanes. Enhancing the overall operation resilience is a mathematically involved problem accompanied with many challenges related to modeling and computation methods. Most previous resilience enhancement methods focus on reducing the amount of load curtailment during extreme events without proactively preparing the system for forecasted extreme events or considering the consequences after the occurrence of an event. Also, system operational cost is usually neglected resulting in higher costs for operational resilience enhancement strategies. In this paper, a multiobjective mixed integer linear programming optimization problem is formulated for generation redispatch to minimize load curtailments and operational costs for a one-day interval when a power system is subjected to a hurricane. System constraints (e.g., ramping rates, minimum up/down times, and transmission line constraints) and spatiotemporal properties of extreme events are considered in the optimization problem. The CPLEX solver is integrated with MATLAB to formulate and solve the optimization problem. Although the proposed method can be adapted to enhance power system resilience against different types of extreme events, the focus of this work is on improving the operational resilience of power grids against hurricanes. The IEEE 30-bus system is used to validate the proposed strategy under two levels of severity: low and extreme impacts. The results demonstrate the effectiveness of the proposed method in improving power grid operational resilience during the development of hurricanes.