西藏高海拔地区大型机组参数选择探讨

Discuss on Parameter Selection of Giant Unit in High-altitude Area of Tibet

如美水电站地处西藏高海拔地区,机组单机容量大,机组参数选择及机组结构设计时应考虑适应高海拔地区的特殊环境。以如美水电站为例,提出一些高海拔地区机组选择时应注意的问题及相应的解决方案,通过适当降低水轮机比转速及比速系数水平,优化机组结构形式,确保机组投产后安全、可靠、稳定运行。

Because the Rumei Hydropower Station is constructed in high-altitude area of Tibet and has a larger unit capacity, the parameter selection and structure design of units should consider the adaptation of unit to high-altitude environment. Taking Rumei Hydropower Station as a case study, some questions on the selection of unit in high-altitude area are presented and corresponding solutions are also proposed. Through reducing turbine＇s specific speed and specific speed coefficient appropriately and optimizing unit structure, the safe, reliable and stable operation of units can be ensured.