A resilience-oriented preventive unit commitment method incorporating load criticality during typhoon disaster scenarios

Extreme disaster events characterized by low probability but high potential losses, such as typhoons, exert a substantial influence on the safety and stability of power system operations. To strengthen the resilience of power systems under typhoon-induced disaster conditions, while accounting for critical operational factors including prioritized load supply and economic investment constraints, this study proposes a novel resilience-oriented preventive unit commitment method with integrated load criticality during typhoon disaster scenarios. The model seeks to minimize the total of unit start-up costs, unit operational costs, and load shedding losses across various critical levels. It incorporates constraints such as the potential failure states of transmission lines, the limits on load loss for each critical level, and the power flow balance constraints within the transmission network. The model ultimately generates a preventive unit commitment plan designed to ensure the uninterrupted supply of critical loads during typhoon disasters. The proposed model is validated using the IEEE RTS-24 test system, and the results demonstrate that the method effectively ensures power supply to critical loads by formulating pre-disaster unit commitment schemes.