为应对大规模风电并网给电网调度决策带来的不确定性影响,提出电力系统鲁棒调度的概念和实施框架,构建了含多类型电源的鲁棒调度模型,模型考虑了抽水蓄能的工况转换和核电机组的降出力工作模式。在此基础上,明确了调度计划中运行成本、弃风成本和切负荷成本的计算方法,并以总成本最优为目标对不确定集进行了寻优。以某省电网为算例,验证了鲁棒调度在减少切负荷和提高风电利用率方面的优势,验证了不确定集寻优的经济效益。
To deal with inherent stochastic nature of wind power, concept and implementation framework of robust scheduling for power systems are presented and a robust model with multiple types of power sources is constructed. The model takes into consideration operating mode switch of pump storage units and derated state of nuclear units. On this basis, calculation method of operation cost, wind curtailment cost and load shedding cost is determined. Meanwhile, uncertainty set is optimized with purpose of the lowest total cost. Taking a provincial power grid as example, advantages of robust scheduling in reducing load shedding and improving utilization ratio of wind power are verified. Economic benefits of optimal uncertainty set are also validated.