大小水电可消纳电量期望值最大短期协调优化调度模型

水电富集地区的小水电在电网中所占比例较大,出力波动频繁,汛期与大中型水电挤占输电通道,造成大规模窝电弃水并威胁电网安全,需要构建有效的大小水电协调优化方法。为此,以西南水电富集的某省为背景,提出了大小水电可消纳电量期望值最大短期协调优化调度模型。该模型将分区小水电作为整体,根据小水电计划与实际出力偏差,采用模糊聚类构建小水电出力场景,并应用启发式搜索和关联搜索方法进行求解。实例研究表明,本文提出的模型和方法能够合理利用大中型水电良好的调节能力实现大小水电协调,减少窝电弃水,是一种实用有效的大小水电混合分区协调优化调度方法。

A short term optimal operation model for the maximization of large and small combined hydropower consumption

Small hydropower (SHP) shares a large proportion in the generation mix in hydropower-rich re- gions. As large and small hydropower crowded to export electricity during flood seasons and the output of SHP fluctuate frequently, it has a serious effect on power grid. This paper introduced a short term optimal operation model for the maximization of large and small combined hydropower consumption. The SHP sta- tions in the same area are considered as a group in the model, using fuzzy clustering analysis method to establish the output scenario of SHP and its probability distribution, which is solved by the combination of heuristic search method and successive associated search method. The application in the small hydropower rich areas shows that this model can effectively use the regulation capacity of large hydropower stations to optimize joint operation and reduce the curtailment of small hydropower. It is a practical and effective short-term optimal operation model for large and small combined hydropower subregion.