Numerical model study on optimal scheme of water intake and sediment control for typical pumped storage power station in sandy rivers
According to the characteristics of water and sediment in the water intake channel of pumped storage power stations(PSPS),two water intake and sediment control schemes,namely sediment interception and drainage and sediment avoidance,have been proposed.The optimization numerical model for water intake and sediment control is established by taking the upper reservoir,the lower reservoir,pressure pipeline and power station equipment as a whole.Based on the study of the turbine sediment concentration(TSC)and the siltation in the upper and the lower reservoirs of a certain PSPS intended to be built on a sandy river,the sediment control effects of the optimized schemes are quantitatively evaluated.Modelling results show that:after implementing sediment interception and drainage engineering,the average TSC will be reduced by 39.7％～44.8％,and the sedimentation rate in the upper and lower reservoir will be reduced by 3.54％and 2.11％,respectively.After adopting the unit outage scheme for sediment avoidance,the average TSC will be reduced by 43.6％～44.8％,the sedimentation rate in the upper reservoir will be reduced by 0.73％;however,the sedimentation rate in the lower reservoir has increased by 2.02％.Both of two optimization schemes can control the TSC within a safe range,and alleviate the effective capacity loss of the upper reservoir to a certain extent.The research results can provide technical support for engineering design and have certain guiding significance for related research.
pumped storage power stationturbine sediment concentrationwater intake and sediment controlscheme optimizationnumerical simulation
万方数据
维普
