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风水火系统长期优化调度方法

, PP. 153-161

Keywords: 风水火,调度,长期,线性混合整数,点估计

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Abstract:

含梯级水电站的风水火联合优化调度对于减少煤炭消耗量、提高清洁能源利用效率具有重要意义。长期优化调度不仅需要考虑不同类型电源运行的差异性和互补性,同时也面临多种的不确定因素,建模和求解的难度均较大。为此,综合考虑检修计划影响、梯级水电站间水力约束以及风力热力与电力相互耦合的复杂约束,建立了风水火长期优化调度模型。为了降低求解难度,将这一大规模、多约束、非线性的优化问题转换为线性混合整数模型予以求解。同时针对模型中各时段水文径流与风速的随机性,利用点估计法构造随机变量的估计点,结合每一个估计点向量进行确定性的长期优化调度模型的求解,进而得到优化调度决策变量的期望值。算例分析结果表明,所提出的调度方法计算精度高,求解速度快,能够方便地处理不确定因素,提高系统的经济性和消纳清洁能源的能力。

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