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葛洲坝枢纽重要作用之一是三峡电站在枯季进行日调节时,通过葛洲坝枢纽的反调节作用来减弱三峡坝址下游河道非恒定流对于航运的影响,从而充分发挥三峡电站的发电效益.本文采用Paeissmann加权四点隐格式差分法和Newton-Raphson迭代法来求解一维非恒定流偏微分方程组的数值解.文中着重探讨了葛洲坝枢纽的反调节方式、葛洲坝枢纽的水位参数和三峡电站的发电因子对于航运要素值的影响以及这三者之间内在的有机联系.特别是对于葛洲坝枢纽的反调节方式进行了优选,从而使最为重要的航运要素-葛洲坝下游河道的最小流量值极大化.为了闸明这些问题,文中引用了三峡枢纽设计蓄水位150 m方案可行性研究阶段的计算成果.
One of the important functions of Gezhouba Hydropower Station is that when the Three Gorges Hydropower Station adjusts daily during the dry season, the effect of unsteady flow on the downstream of the Three Gorges Dam through the anti-regulation effect of the Gezhouba Dam can be weakened so as to give full play to the power generation benefits of the Three Gorges Hydropower Station.In this paper, Paeissmann weighted four-point implicit difference method and Newton-Raphson iterative method are used to solve the numerical solution of one-dimensional unsteady flow partial differential equations.In this paper, the anti-adjustment method of Gezhouba Dam, the water level parameters of Gezhouba Dam and the power generation of Three Gorges Power Station The influence of factors on the value of shipping elements and the inherent organic relationship between the three.In particular, the anti-adjustment method of Gezhouba junction is optimized so as to maximize the minimum flow value of the most important shipping element - the lower reaches of Gezhouba Dam. In order to clarify these problems, the article cites the calculation results of the feasibility study stage of the 150m water level design for the Three Gorges Project.