单辅助线法在水库调洪计算中的应用研究

Application Study of Single Auxiliary Line Method on Reservoir Flood Routing

针对水库调洪计算中因为变化节点时段长的改变导致单辅助线法存在较大误差的问题,根据水库已知控制条件,通过构建并求解变化节点变时段长变量的一元二次方程,并重新构建变化后时段长相应的工作曲线进行调洪计算,提高了单辅助线法的计算精度,解决了单辅助线法仅适用于无闸门的等时段水库调洪计算的适用范围问题,并且对于双辅助线法,有着同样的效果,尤其利于编程实现。采用该方法,应用于考虑机组过水能力的水库调洪计算中,重点研究了有防洪任务的水库防洪高水位敞泄及机组发电流量控制等操作节点调洪计算的单辅助线法应用及出流量计算,并编制程序应用于某水库的调洪计算中,计算成果精度较好,方法可供借鉴。

In the calculation of reservoir flood routing,the large error in the single auxiliary line method is caused by the changing nodes.According to the known control conditions of the reservoir,this paper constructed and solved the quadratic equation of changed time interval,also,it reconstructed a new working curve based on the changed time interval.This approach highly improved the calculation precision and extended the application scope of the single auxiliary line method.In addition,it had the same effect on double auxiliary line method,especially for programming.By using this method,it was applied to reservoir flood routing which is considering the maximum discharge of turbine,and this paper analyzed the application of single auxiliary line method and the discharge calculation for reservoir flood routing on some operation nodes like high water-level discharge and power discharge control.Finally,this method was applied to the reservoir flood routing in a reservoir.The results was proved to be good and the approach was available for reference.