基于变时间尺度和两阶段鲁棒优化的电力系统短期平衡裕度提升方法

To address the issue of inadequate short-term power balance sufficiency in high-proportion renewable energy power system, a method for enhancing power system balance margin based on variable time scales and two-stage robust optimization is proposed. Considering the uncertainties of renewable energy and load, a two-stage robust optimization model for power balance analysis is established. The model developed short-term hour-level and ultra-short-term minute-level balances at variable time scales. Taking into account the coal quality differences of thermal power units during different periods, a refined model of the operational characteristics of thermal power units is developed. A balance margin early warning and enhancement system centered on short-term balance margin is constructed. Flexible resources are utilized through hierarchical and classified allocation to enhance the short-term power balance margin. The results of case studies demonstrate that the proposed method can effectively improve system balance adequacy, enhance the robustness to renewable energy and load fluctuations and strengthen the power supply capability during peak load periods.