Cascading-Driven Intentional Controlled Islanding for Enhancing Power Grid Operational Resilience

Power systems face significant threats from severe disturbances, often triggered by extreme weather, leading to widespread cascading power outages. Although intentional
controlled islanding (ICI) is an effective last-resort operational mitigation strategy employed by system operators worldwide to prevent complete cascading blackouts, the impact of large-scale disturbances, particularly weather-induced cascading outages, on when and where to implement it is not adequately considered nor reflected in current operational decision-making standards and procedures. This paper proposes a holistic cascading-driven framework that seamlessly integrates advanced weather-related incident modelling and cascading risk quantification of highimpact low-probability (HILP, or tail-risk) events with a novel decision-making-based islanding method to enhance operational resilience