Data of paper Frequency Security Constrained Multi-stage Dispatch of Power Systems with Offshore Wind Farms

High-penetrated offshore wind farms (OWFs) to power systems result in low inertia and bring large disturbances. To enhance the frequency security, this paper proposes a frequency security constrained multi-stage dispatch problem by inserting the dynamic frequency process into the unit commitment (UC) and economic dispatch (ED) framework. Firstly, the transient frequency response model of power systems considering the active frequency support of OWFs is established. Then, a transient frequency security constrained model is built through discretization and linearization methods. This model, regarded as the third stage problem, is embedded into the traditional dispatch framework. To avoid over-deloading of OWFs caused by frequency security constraints, the curtailment rate constraint is established. Finally, the nested Benders decoupling algorithm is designed to accelerate the solution of the above multi-stage optimization problems. Numerical results demonstrate that the proposed model and method can well describe the transient state, and accurately solve the frequency constraints. Compared to the previous works, the method in this paper can further reduce the number of startup power units, optimize the dispatching cost, and improve the utilization rate of offshore wind power.