Stability Constrained Robust Unit Commitment for LCC-HVDC Transmission Power System with Renewable Energy-Thermal Power Bundled

The transmission of power from large-scale renewable energy-thermal power bundled installations via LCC-HVDC transmission system is considered as a crucial method. To ensure system stability and minimize operational costs, a stability constrained robust unit commitment (UC) model is proposed. First, the model formulates stability constraints, including short-circuit current, voltage stability, and frequency stability. Next, accounting for the N-1 safety criterion, a robust UC model is developed to handle multiple discrete scenarios. Then, a linear equivalent transformation method is devised for the proposed UC model, facilitating the conversion of the original problem into a mixed integer linear programming (MILP) problem. Finally, a modified IEEE 39-bus system is tested to validate the effectiveness of the proposed method.