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基于机会约束规划的虚拟电厂调度风险分析

DOI: 10.13334/j.0258-8013.pcsee.2015.16.004, PP. 4025-4034

Keywords: 虚拟电厂,经济调度,风险分析,机会约束规划,不确定因素,最佳置信水平

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Abstract:

机会约束规划主要用来处理含多个随机变量的复杂约束问题,由于虚拟电厂存在大量不确定因素,包括可再生能源输出功率波动、负荷预测误差、机组故障停运等,采用机会约束规划建模能够很好地描述由随机变量带来的不确定性。该文建立基于机会约束规划的虚拟电厂(virtualpowerplant,VPP)经济调度模型。该模型以最大化虚拟电厂经济效益为目标、旋转备用约束为机会约束,利用随机模拟和遗传算法结合的混合算法进行求解。针对机会约束规划处理中所伴随的失负荷风险,建立风险量化指标,讨论不同控制场景、不同置信水平及不同风险系数下VPP调度决策所面临的风险水平,探讨虚拟电厂调度过程中经济性与风险性之间的平衡关系,以期为机会约束规划中最佳置信水平的选择提供参考。

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