A Determination Method of Sediment Flux Passing Machine in Sandy River Pumped-storage Power Station

Abstract

The invention discloses a method for determining the sediment flux passing through a pumped storage power station in a sandy river. The method establishes a two-dimensional non-constant flow water and sand mathematical model, and simulates and calculates the annual flow rate of the pumped storage power station during operation. area topography. On the basis of the annual topography of the reservoir area, a mathematical model of water and sediment is used to establish the relationship between the sediment concentration in the reservoir and the sediment concentration at the water intake during pumping. Theoretical analysis is used to establish the sediment concentration change model of the reservoir of the pumped storage power station, and the relationship between the sediment concentration at the water intake during power generation and the sediment concentration at the water intake during pumping is established. According to the definition of the passing sediment flux of the pumped storage power station, combined with the above two relational expressions, a calculation method for the passing sediment flux of the pumped storage power station is comprehensively established, and the method can be used to determine the passing sediment flux of the pumped storage power station The flux provides a basis for the selection of the turbine model of the pumped storage power station, the formulation of sedimentation promotion measures in the process of pumped hydropower generation, and the selection of pumping timing.

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 ...

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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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