Study on the Calculation Method of Inflow of Cascade Hydropower Stations Considering the Optimization of Water Level in Front of the Dam
The inflow and outflow of reservoirs are very important for the operation of hydropower stations.The in-flow and outflow of reservoirs in actual are generally calculated by combining data such as water level,output,and gate o-pening with the characteristic curves of reservoirs and hydropower stations.However,due to various factors such as wa-ter level fluctuations in front of the dam,the correctness of the inflow and outflow of the reservoir and the logical consis-tency of runoff between upstream and downstream power stations are often disrupted.In view of this,this article takes the cascade hydropower stations in the lower reaches of the Dadu River Basin as an example to address the impact of water level fluctuations on the runoff consistency.Based on the idea of replacing single point values with multi-point average water level values,with the goal of minimizing interval fallacy rate,a model for optimizing the multi-point water level values and water balance calculation time points of each power station has been established.Based on the water level data from January 2019 to December 2021,validation analysis was conducted.The results show that after optimizing the water level,the interval fallacy rates of the cascade power stations were reduced to varying degrees.The Shenzhen interval and Gongtong interval had the best effect,with a decrease of about 40%in the Shenzhen interval and about 30%in the Gong-tong interval.The research results can provide reference for relevant research in other basins.
runoff logicwater level optimizationwater balancewater level in front of damwater level fluctua-tionDadu River Basin
NETL
NSTL
万方数据
