长引水隧洞水电站小波动过渡过程影响因素研究  

Study on stability of small oscillation transient process of hydropower station with long-distance diversion tunnel

作　　者：焦云乔[1] 江春波[1] 孔庆蓉[1] 张永良[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《水力发电学报》2009年第3期157-163,共7页Journal of Hydroelectric Engineering

基　　金：973项目(2006CB403304);国家自然科学基金项目(90610028;50539070);清华大学水沙科学与水利工程国家重点实验室基金(2008-ZY-5)

摘　　要：结合锦屏二级水电站工程实例,通过数值计算分析长引水隧洞水电站小波动稳定性影响因素。研究了机组空载时的小波动稳定性,以及阻抗式调压室阻抗孔面积、阻抗孔损失系数和引水系统糙率对于小波动稳定的影响。研究结果表明:空载时小波动稳定性满足设计要求;减小阻抗孔面积对于提高小波动稳定性十分有效:小波动稳定性对于阻抗损失系数敏感性较低;引水隧洞糙率对于小波动稳定性有较明显影响,需慎重选择引水管线方案。Taking the Jinping Ⅱ hydropower station for an example, the stability of small oscillation transient process with long-distance diversion tunnel is analyzed by numerical calculation. The stability of small oscillation is investigated when the generating unit has no load, the stability of small oscillation by effect of the chamber area, water head loss coefficient of surge tank and the roughness of the tunnel are also investigated. The results of the investigation suggest that the no-load condition meets the need of safety, the chamber resistance as well as the roughness of tunnel has great influence on the stability of small oscillation transient process, the head loss coefficient of surge tank only has a little influence on the stability.

关 键 词：水力学 过渡过程 小波动 数值计算 糙率 

分 类 号：TV136[水利工程—水力学及河流动力学]