水光蓄互补联合发电工程施工中压力管道闷头应用研究

Application of Penstock Plug in Construction of Hydro-Photovoltaic-Pumped Hybrid Project

春厂坝变速抽水蓄能示范电站是国内首个在已建水电站引水钢管上接入小型抽水蓄能电站的梯级水光蓄互补联合发电工程。在工程施工期间,通过采取安装闷头等措施,在有效确保原水电站发电效益的同时,也给水电站运行带来了的安全风险。通过采用压力容器、球形岔管、三维有限元等模型和计算方法对水电站带闷头运行工况安全性进行复核,总结分析了闷头运行情况,为常规梯级小水电改造为水光蓄互补联合发电系统时,确保原水电站经济效益和运行安全提供了解决思路。

Chunchangba Variable-Speed Pumped-Storage Demonstration Power Station is the first energy generation project applying complement system of hydropower,light energy and pumped-storage power in China,which is connected to a small pumped-storage power station on the diversion steel pipe of an existing hydropower station.During the construction of the project,measures such as installing bulkhead are taken to effectively ensure the power generation benefits of the original hydropower station,meanwhile the risk is also brought to the operation of the hydropower station.In this paper,through the use of pressure vessel,spherical bifurcated pipe,three-dimensional finite element model and calculation method,the safety of hydropower station with bulkhead operation condition is rechecked,and the bulkhead operation condition is summarized and analyzed,which provides a solution to ensure the economic benefit and operation safety of the original hydropower station when the conventional cascade small hydropower station is transformed to the hydro photovoltaic storage complementary combined power generation system.