Thoughts on the Sediment Passing Content in Pumped-Storage Power Station Design
Pumped-storage power stations are pivotal in China's large-scale energy storage systems,offering economical and reliable solutions.However,their operational efficiency is significantly impacted by sediment-related issues.Currently,the industry lacks a clear standard for permissible sediment content in these stations,typically defaulting to a reference value of less than 0.05 kg/m3.This paper draws on practical engineering experience to propose a methodology for calculating and optimizing sediment content in pumped-storage power stations.Our approach includes:① Assessing sediment gradation and evaluating the abrasive impact of various sediment particle sizes on turbine blades.② Analyzing the vertical sediment distribution,considering the elevation of water intakes and the impact range of pumping operations to determine sediment content.③ Examining the sediment settlement process and proposing corrections to the natural sedimentation process by integrating the sediment discharge and retention processes of upstream reservoirs.Additionally,this study suggests the potential necessity of constructing a sand dam and incorporating the costs of turbine replacement in economic evaluations to more accurately assess the feasibility of pumped storage power stations.The methodologies and insights offered in this paper aim to serve as valuable references for engineering design in this field.
clean energypumped-storage power stationsediment content
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