一洞多机引水式水电站短期负荷分配方法

我国许多大型水电站采用一洞多机长距离引水发电模式，短期负荷分配面临机组间水力相互干扰、水头计算困难等问题，建模及求解极其困难。考虑到一洞多机式电站机组间水力联系复杂，采用两阶段建模求解：第一阶段建立考虑持续时段约束的水电机组开停机优化模型，结合启发式搜索策略和逐步优化算法确定开机隧洞及最优开停机组合方式；第二阶段建立以电定水准则的负荷分配模型，采用动态规划方法进行给定开停机方式下机组间的负荷最优分配。以红水河某水电站枯水期不同负荷率典型日分配为例，结果表明所提方法具有较强的实用性，可满足实际运行要求。

Short-term load distribution method for diversion hydropower plant with multiple turbines in one tunnel

Many large hydropower stations in China adopt long distance water diversion power generation mode with multiple turbines in one tunnel, short-term load distribution faces problems of mutual interference between units and complication in hydraulic head calculation and so on, and it is extremely difficult to model and solve. Considering the complex hydraulic connection between units, two-stage modelling is adopted. In the first stage, an optimal on/off model of units considering duration constraints is established, and the heuristic searching strategy combined with progressive optimization algorithm is adopted to determine the start-up tunnel and the optimal on/off unit commitment. In the second stage, the load distribution model with the criteria of determining water consumption by electricity generation is established, and the dynamic programming method is used for optimal load distribution among units under the given on/off unit commitment. The load distribution of a hydropower station of Hongshuihein dry-season under different typical load rates is taken for example, and results show that the proposed method is of strong practicality and can satisfy practical operation requirements.