Review of semi-underground powerhouse scheme application in pumped storage power station

In order to explore the application status and popularity of semi-underground powerhouse scheme in the construction of pumped storage power stations, we explain the scope of application, advantages and disadvantages of semi-underground powerhouses, and sort out the basic situation, investment comparison and selection reasons of semi-underground plant schemes used in existing and under construction pumped storage power stations at home and abroad.It was found that this scheme was currently common in conventional or hybrid pumped storage power stations with tail development mode and suitable terrain and topography, it had the advantages of reducing the amount of chamber excavation, convenient operation and management, saving construction period and investment, etc, but attention should be paid to structural safety and anti-seepage and drainage design.The research results can provide technical reference for small and medium-sized pumped storage power stations to adopt the semi-underground powerhouse scheme.