Pre-disaster prevention strategies for coupled thermoelectric systems under extreme cold disasters

Extreme natural disasters have occurred more frequently in recent years. Effective pre-disaster prevention strategies can significantly improve the ability of the thermoelectric coupling system to withstand extreme cold natural disasters, reduce the critical load loss, and improve the stability of the system's operating state. To improve the defense of the thermoelectric coupling system against extreme natural disasters, a two-stage pre-disaster optimization prevention strategy is proposed to reduce the risk of the electric coupling system being affected by a disaster. In the first stage, a thermoelectric unit output optimization adjustment model was established to increase the system load margin, and adapted to different fault scenarios to solve the unit output scheme to enhance the stability of the thermoelectric coupling system, and reduce the system stability caused by the rapid increase in load demand; In the second stage, a decision-making model for the optimal allocation of emergency resources was constructed. The preventive methods such as unit fuel allocation, mobile energy storage deployment, critical line inspection and reinforcement were coordinated to reduce the economic loss caused by equipment failure and load shutdown in the system. The simulation of the test thermoelectric coupling system is carried out to verify the effectiveness of the proposed two-stage optimization. Besides, the effect of the two-stage interaction is analyzed, which provides valuable reference information for the planning and decision-making of the power grid company.