Through the analyze to the structure of main components' weld of linked-together lamp bulb unit and relating materials,the cold crack should be taken into great consideration in welding.

The installation process of bulb turbine units for Dadingzishan Navigation-Power Station,together with some problems existed during installation and relevant solutions are provided,hoping to provide a reference for similar projects.

Some issues on bulb tubular unit operation;

By analyzing the inflow, geology condition and economic index of Luodong hydroplant, the author recommended bulb tubular unit applied to enlarge the electricity generation sets, and also he discussed feasibility design.

It recommends scheme of the electrical primary design which serves as a reference for design of hydropower stations with similar bulb tubular units.

Analysis of problems with the installation and test of tubular hydro-unit;