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西洱河二级水电站是我国目前“以阀代井”全国试点电站中最大的一个。所谓“以阀代井”,就是在引水系统中不设置调压井,而在每台机组的蜗壳直管段末端装设调压阀(也叫空放阀),以代替调压井的作用——这就叫做“以伐代井”。西洱河分四个梯级开发,利用滇西高原湖泊——洱海出口的西洱河水发电。西洱河二级电站为引水式电站。引水系统经进水口、引水隧洞、高压钢管道至机组。压力管道总长度达
The second stage hydropower station in Xi’erhe River is the largest pilot station in China that “replaces the well with the valve” in China. The so-called “valve well” is not in the diversion system surge tank, and in each unit volute straight pipe at the end of the installation of pressure regulating valve (also known as empty valve), instead of the role of surge shaft - This is called “cutting well for well”. The West River is divided into four cascade development, the use of West Lake Plateau Lake - Lake Erhai exports of water to generate electricity. Xi’erhe II hydropower station is a diversion power station. Water diversion system through the inlet, diversion tunnel, high-pressure steel pipe to the unit. Total pressure pipe length up to