Resilience Oriented Unit Commitment Considering Transportable Energy System Under Typhoon Impact
Yu-Chang Lee, Wen‐Shan Tan, Yuan‐Kang Wu
Abstract
Over the past years, extreme weather events such as typhoons and earthquakes have become more frequent and severe across the globe. These events leave thousands of people without electricity and cost utility companies millions of dollars for grid restoration. Therefore, power system resilience, which focuses on high-impact, low-probability events, is a crucial consideration for the system operator. This paper proposes a day-ahead resilience-oriented unit commitment that aims to minimize the cost of mitigating the impact of typhoons. By using a weather-dependent fragility curve for the transmission components, the proposed framework minimizes system load shedding under typhoons. To address the high-impact nature of typhoons, robust optimization is implemented, which ensures the worst-case performance of unit commitment. The tri-level problem is reformulated to a bi-level robust problem using the Column & Constraint Generation algorithm. The proposed model introduces a Transportable Battery Energy System (TBES) to reduce load shedding and absorb the additional operational cost associated with enhancing power system resilience. The effectiveness and efficiency of the proposed framework are demonstrated using the IEEE RTS-24 and 118 bus systems.