中文摘要：

水库调度图是水电站发电调度运行的基础,然而现有研究和算法大都集中在单库调度图,库群发电调度图成果较少。本文结合我国开发得较为完善的乌江流域梯级水电站群,提出了一种实用的梯级水电站群发电优化调度图制定方法。该方法以单库调度图为基础,综合形成初始的库群调度图,并以此进行模拟调度,即根据两种调度图对长系列资料逐时段计算,获得两种负荷结果,最终运用库群负荷分配调整两种负荷的偏差,获得调度结果;然后以模拟调度统计的多年平均发电量最大为目标,采用逐次逼近算法不断修正两种调度图的基本调度线,最终获得满足精度要求的单库调度图和库群调度图。较常规方法,本方法方便一次性得出水电站（群）调度图。模拟调度结果表明所建立的方法有效、实用,在兼顾电网对电站要求的基础上,大大提高了梯级长期发电效益。

英文摘要：

Hydroelectric plant operation is based on an operation chart.Most of the existing literatures,however,paid much more attention to the single reservoir chart than cascade reservoirs.In this paper,an approach of working out the optimal operation chart for cascade reservoirs is proposed and applied to the well-developed Wujiang River hydropower system in China.Based on the initial traditional operation charts for single reservoir and cascade reservoirs,power results of each single plant and the cascade system are obtained.Then the load dispatching strategy of cascade reservoirs is adopted to regulate the power variance between the sum power of all the single plants and the power of cascade system.By repeating this procedure,the simulated runoff history is obtained.Finally a dynamic programming successive approximation（DPSA） is used to modify the basic parameters of the two charts at an objective of energy maximizing.In comparison with the traditional effort,this approach can give an integrated optimal operation charts for single reservoirs and cascade system.Simulation results indicate that the proposed approach is valuable and feasible and it significantly improves the power generation benefit under the power grid requirements.