Method for determining flux of sediment passing through turbine of pumped storage power station for heavily silt-carrying rivers

Abstract

The invention discloses a method for determining the flux of sediment passing through a turbine of a pumped storage power station for heavily silt-carrying rivers. The method is characterized in that a plane two-dimensional unsteady flow-sediment mathematical model is established, the reservoir area terrain of each year in the running process of the pumped storage power station is obtained through analog calculation, the flow-sediment mathematical model is adopted to establish a relationship between the storage sediment concentration and the sediment concentration at an intake during pumping on the basis of the reservoir area terrain of each year, a sediment concentration change model of a reservoir of the pumped storage power station is established by theoretical analysis, a relationship between the sediment concentration at the intake during power generation and the sediment concentration at the intake during pumping is established, and a method for calculating the flux of sediment passing through the turbine of the pumped storage power station is comprehensively established in combination of the two relationships according to definition of the flux of sediment passing through the turbine of the pumped storage power station. The method provided by the invention can be adopted to determine the flux of sediment passing through the turbine of the pumped storage power station and provides references for selecting the model of the turbine of the pumped storage power station, formulating deposition promotion of sediment in the pumped power generation process and choosing the pumping time.

Description

technical field [0001] The invention relates to a method for calculating reservoir sediment, in particular to a method for determining the flux of sediment passing through a pumped storage power station in a sandy river. Background technique [0002] Electricity is produced, delivered, and used all at once, which is difficult to store. There are generally peak and valley differences in electricity consumption in daily life, such as: the electricity consumption is high during the day, and the electricity consumption is small after midnight. The difference in electricity load leads to the need for full generation of power generation equipment during peak electricity consumption, and the need to reduce generator sets during low electricity consumption, which has a negative impact on the safety, economy, and stability of the power grid. Therefore, a series of measures need to be taken to reduce the impact of peak and valley differences in power consumption. The pumped storage ...

AI Technical Summary

Problems solved by technology

Existing machine-passing sediment volume is mainly determined by physical models, but the research cost and research period of the physical model are long, and it is difficult to predict the actual machine-passing sediment volume in real time after the construction of the pumped storage power station

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