Numerical Simulation of the Influence of Water Flow on Navigation and Optimization Scheme Selection of a Power Station

In the 10 million Kw daily peaking capacity project of a Power Station, the daily average flow is 10000 m(3)/s, the starting passing dam flow is 2800 m(3)/s, 10000m(3)/s and 17200 m(3)/s, and the maximum turbine flow velocity Q is 7200 m(3)/s.We conducts the numerical simulation of load increment and load rejection adjustment operation of the power station, the motion law of single oblique wave caused by the turbine flow and its time-varying process at the dam upstream river.This article also analyzes motion law of non-constant wave at the dam upstream river and its influence on the navigation flow condition when the single oblique wave passes the approach channel entrance area, and then calculates relatively accurate hydrodynamic parameters.In order to meet the navigation standards,we adopt the optimization scheme in which power units are divided into two groups and operate at 5 minutes interval.The calculation results indicate that they can all meet the navigation flow condition.When the power station jointly perform the load rejection adjustment operation and ship lock single-gates filling, the wave height in approach channel exceeds the standard,so the optimization scheme of time-staggered operation of the power unit and ship lock is adopted to reduce the wave height,and the results meet the navigation standard,it is the best optimization operation scheme of power unit to guarantee the safe operation of the river.