Optimal Reserve Determination for Diversified Frequency Regulation Resources via Frequency Constrained Unit Commitment

With the large-scale integration of renewable energy sources, the frequency security of power systems is increasingly challenged. In this paper, we propose a frequency constrained unit commitment (FCUC) to determine the optimal reserve for diversified frequency support resources (DFSRs), ensuring that the system's frequency response capability after power disturbances meets the specified requirements. DFSRs and load frequency relief (LFR) are considered based on the inertia dependent frequency reserve (IDFR) model, and a joint model-data driven approach is proposed to address the challenges of frequency response analytical expression and maximum frequency deviation constraint convexification arising from the consideration of LFR. Finally, the proposed FCUC is transformed into a mixed-integer linear programming model and validated through case study on the IEEE 39-bus system, demonstrating its effectiveness.