废弃矿井抽水蓄能电站水泵水轮机关键技术

 废弃矿井抽水蓄能电站“大落差、小空间、水质差”的特点决定了废弃矿井抽水蓄能电站水泵水轮机需要满足“超高水头、小体积、高耐蚀”的要求。目前适用于废弃矿井抽水蓄能电站的水泵水轮机的研究还不够全面，以矿井水为工作介质的水泵水轮机腐蚀-磨损-空蚀耦合机理还不够系统，针对新能源消纳的水泵水轮机频繁切换工况过渡过程还不够明确，需要进一步开发水泵水轮机水力实物模型设计优化技术，研发水泵水轮机频繁切换工况过渡过程安全稳定运行技术，研究矿井水条件下水泵水轮机腐蚀-泥沙磨损-空蚀耦合机理及协同控制技术。

Key technologies of pump-turbine in underground pumped storage station using abandoned mine

Underground pumped storage station (UPSS) using abandoned mine is a newly emerging technology, which has great significance to adjust the energy industrial structure of China in the future. Pump-turbine is the key equipment of UPSS. The characteristics of large drop, small space and poor water quality of UPSS requires the pump-turbine to be of ultra-high head, small volume and high corrosion resistance. Through the analysis of domestic and foreign research status, it is found that the research on pump-turbine in UPSS using abandoned mine is not comprehensive, the study on the corrosion mechanism of pumpturbine with mine water as working medium is not systematic, nor the transition process of pump-turbine frequently switching working conditions for new energy consumption is clear. Therefore, it is suggested to further develop a hydraulic model design optimization technology, research safe and stable operation technology in the transition process in frequent switching conditions, and study the coupling mechanism of corrosion-sediment wear-cavitation erosion and collaborative control technology.