中文摘要：

特大流域梯级水电站群调度面临越来越高的综合利用要求，对于有航运要求的江河流域，通航和电网调峰是面临的主要突出问题。以澜沧江下游景洪一橄榄坝梯级水电站反调节调度问题为背景，以通航和调峰为控制目标，提出一种梯级水电站多目标优化调度混合搜索方法。该方法采用电网余荷最大值最小和反调节电站下游河道水位过程方差最小为目标，在NSGA—Ⅱ搜索过程中，针对爬坡上限、出力波动控制限制、开停机最小持续时间、期末水位控制等复杂约束，提出时间耦合约束处理策略、末水位修正策略及改进的遗传操作算子，以提高方法搜索求解效率和获得满足工程应用要求的计算结果。实例应用结果表明该文方法可以兼顾电网调峰和河道通航应用要求，是一种切实可行的方法。

英文摘要：

The optimal operation of large scale cascaded hydropower plants involves more and more high comprehensive utilization requirements. The contradiction between peak load regulation and navigation has been one of serious problems facing the rivers with navigation demand. Taking Jinghong and Ganlanba cascaded hydropower stations on the Lancang River as the background, a hybrid search method for multi-objective optimization operations of cascaded hydropower plants with peak load regulation and navigation demands was proposed. The objective of the method is to minimize the residual load＇s maximum of the power grid and the variance of tail water levels of the downstream hydropower station. Furthermore, this method introduced some solution strategies to deal with complex temporal coupling constraints, including generation ramping constraints, generation fluctuation limit and minimum continuous time-steps of operation and shutdown, and the specified level control targets in the solution process of the NSGA-II in order to improve the search efficiency of the method and obtain the practical and rational results. The results show that our method can meet the demands for peak load regulation and navigation simultaneously. Thus it is concluded that the proposed method is feasible and practical.