Abstract:To enhance power supply assurance in system operations, this study proposes an evaluation methodology to assess the impact of coal-fired power capacity pricing mechanisms on improving power generation capacity. Firstly, a coal-fired power production revenue model is established under the capacity pricing mechanism, incorporating factors such as power generation costs, energy revenue, and capacity revenue. Subsequently, based on this revenue model and actual grid operation requirements, the maximum achievable generation capacity of coal-fired power units is analyzed under profitability assurance constraints. Finally, leveraging real grid operation data, unit parameters, and capacity pricing implementation details, the effectiveness of capacity pricing in enhancing coal-fired power generation capacity is evaluated, with further analysis on how varying capacity pricing implementation ratios affect capacity improvement. Results demonstrate that for a 660MW unit, a 30% capacity pricing implementation ratio increases generation capacity by approximately 6% in validation scenarios. Additionally, an optimal capacity pricing implementation ratio exists, enabling the maximization of generation capacity at the minimum compensation cost.