锦屏二级水电站长引水隧洞水力特性研究  

Study on the Hydraulic Characteristics of Jinping Cascade-II Hydropower Station with Long Diversion Tunnel

作　　者：孔庆蓉[1] 张永良[1] 江春波[1] 

机构地区：[1]清华大学水利水电工程系泥沙动力学与水力学重点实验室,北京100084

出　　处：《水力发电》2009年第3期32-34,37,共4页Water Power

基　　金：国家自然科学基金重点资助项目雅砻江基金(50539070)

摘　　要：长引水隧洞由于水击波反射较慢,存在着若干与短引水洞不同的特殊水力学问题。锦屏二级水电站2台机组共用1个调压室,有振荡周期长、振幅大、涌波衰减慢等水力特点,一般情况下,上下游的水位组合对系统的水力干扰稳定性也有一定影响。因此过渡过程计算中,在选择调速器参数的时候,要考虑将水头差较小的情况选择为控制工况;在甩负荷的情况下,压力极值也可能并不出现在甩去满负荷时,对甩去部分负荷的情况也要进行仔细核算。在锦屏二级水电站的基础上,对长引水隧洞水电站的相关特殊水力学问题作了介绍。There are some different special hydraulics problems between long and short diversion tunnel due to slow water hammer wave reflection. In the Jingping Cascade-Ⅱ Hydropower Station, two generating units use one surge chamber so that it has long period of oscillation, large oscillation range and slow-attenuation wave. Generally, the maximum or minimal surge water level caused by load rejection or load increment under stable operation mode is usually not the controlling value, so the possible surge superposition needs to be checked. Based on the Jingping Cascade-Ⅱ Hydropower Station, this paper introduces the relative special hydraulics problems of the hydropower station with long diversion tunnel.

关 键 词：引水隧洞 水锤 水力干扰 锦屏二级水电站 

分 类 号：TV672.2[水利工程—水利水电工程] TV134.1