多级串联梯级泵站扬程优化分配研究

为了使梯级泵站群整体以效率最高状态运行,降低输水成本,确定不同工况下梯级泵站群的最优运行调度方案,开展了针对南水北调来水调入密云调蓄工程梯级泵站不同的梯级净扬程组合下的扬程优化分配研究,即当首级泵站进水侧水位和末级泵站出水侧水位(即梯级净扬程)一定时,各级泵站间的扬程分配。在满足各渠段水力联系、各级泵站进、出水侧水位约束等多个条件的前提下,利用动态规划法进行求解,得出各级扬程分配的最优解,使整个梯级输水系统运行效率最高,从而得出梯级泵站系统联合运行扬程优化分配方案。

Study on optimized distribution of pumping-head for multistage cascade pumping stations

In order to make the cascade pumping station group operates under the condition with the highest efficiency and lower the water conveyance cost， a study on the optimized distribution of pumping-head under the combinations of the net heads of various cascades for the cascade pumping stations for Miyun Reservoir Regulation and Storage Project for Incoming Water from the South-to-North Water Transfer Project is carried out， so as to determine the optimal operation control scheme for the cascade pumping station group； i.e. the pumping-head is distributed among all the pumping stations， when both the water level of the intake-side of the first stage pumping station and the water level of the outlet-side of the final stage pumping station （ the net head of the cascade） are at certain levels. Under the premise of satisfying several conditions， such as the hydraulic connection of all the channel sections， restriction of the intake-side water level and outlet-side water levels of the pumping stations of all the stages， etc.， the optimal solutions for the distribution of all the pumping-heads are obtained by means of the dynamic programming， which makes a highest operation effeciency of the whole cascade water conveyance system， and thus the optimized pumping-head distribution for the joint-operation of the cascade pumping stations is realized as well.