Fast Load Recovery Optimization Method After Under Frequency Load Shedding Considering Demand-Side Resources

Load shedding is an emergency measure in power systems, but the recovery time after a load shedding event is often quite long. To reduce the adverse effects on users caused by under frequency load shedding(UFLS), this paper proposes an optimized scheduling model for load recovery after UFLS, which considers demand-side resources and aims to maximize load recovery while minimizing recovery time. The model also provides a method for linearizing nonlinear constraints. By introducing the demand response of loads into the load recovery process after load shedding and adjusting the demand-side resources downward, the model provides more space for load recovery, thereby improving the efficiency of load recovery and reducing the adverse effects of power outages on users. The IEEE-33 node system was used for case study verification, and the results showed that the proposed model can provide load restoration plans that ensure frequency dynamic security, with a fast recovery speed.