三峡梯级日优化运行模型及算法

 三峡梯级水电站日运行中，给定三峡用水量制定梯级发电计划，给定梯级总负荷优化电站间负荷分配，是其两种最基本的运行方式。针对这两种基本运行方式，探讨了几种常用优化准则的数学模型。根据实际运行中梯级的各种约束条件，建立了梯级日优化运行的数学模型，给出了相应的计算方法。在计算中，考虑电站的水头变化和两坝间水流时滞的影响，对上述优化问题采用了综合改进动态规划的方法进行计算。仿真计算表明，该模型及算法能够很好地解决三峡梯级日优化运行问题，并能够满足实际运行的需要。同时，还就实时优化问题进行了探讨。

Optimal daily operation model and algorithm for Three Gorges cascade hydropower plants

In the daily operation of the Three Gorges cascade hydroelectric power stations, working out the power generation program of each cascade under given total water consumption of two plants and optimizing the load distribution between two plants under given total load in order to get maximum benefit are two fundamental modes. Aiming at these two modes, a mathematics model is established based on various restraint conditions of cascade hydropower stations and their corresponding algorithms are given. Considering the affecting factors such as variable heads and time-delay of flow between two dams, the synthetic improved dynamic programming (DP) algorithm is applied to solve the optimization problems. Simulation study shows that the model and algorithm can solve the problems of optimal daily operation of Three Gorges cascade hydropower stations, and the results are satisfactory. Finally, The real-time optimization is discussed.