计及核电风险量化的多源互补调峰调度方法

Multi source complementary peak shaving scheduling method considering nuclear power risk quantification

为应对大规模可再生能源并网造成的电力系统灵活经济调峰难题,文中提出一种计及核电风险量化的多源互补调峰调度方法。首先,分析核电低负荷的调峰机理,并考虑其调峰风险量化指标,从而实现核电的经济安全运行;然后,以总运行成本最低为优化目标,在目标中权衡弃风光损失和不同电源参与调峰增加的发电成本,建立含风、光、火、核、储的多源互补调峰调度模型,并对模型进行求解;最后,实际算例证明了所提优化调度模型的有效性。算例结果表明,与火电调峰、无储能参与的核电调峰相比,所提模型可使弃风弃光量减少94.17%,碳排放下降1.26%,进而验证了多源互补模式不仅可以提升高比例风光电网调峰能力,而且可以实现多源互补系统的低碳经济运行。

To address the flexible and economical peak shaving issue of power grid in the presence of large-scale renewable energy penetration,a multi-source complementary peak shaving scheduling method with detailed consideration of nuclear power risk quantification is proposed.Firstly,the mechanism of low load peak shaving for nuclear power is analyzed,and its peak shaving risk quantitative indicators are considered to balance its economical efficiency and safety.Secondly,a wind-solar-thermal-nuclear-storage based multi source complementary peak shaving scheduling model is established,which takes the minimum total operating cost as the optimization goal,and considers the loss of wind and solar power waste and the increased power generation cost of different power sources participating in peak shaving,and the mode is solved.Finally,case study demonstrates the effectiveness of the proposed optimization scheduling model and its superiority.The results show the proposed method can achieve a 94.17%reduction in wind and solar waste compared to thermal power peak shaving and nuclear power peak shaving without energy storage participation,and a 1.26%reduction in carbon emissions.This indicates a significant improvement of the peak shaving ability of a high proportion of wind and solar power grid within multi source complementary mode.The proposed method provides a practical approach to realize economical and low carbon economy operation of multi source complementary system.