The purpose,input conditions and main technical and economical indices of typical design for 220 kV and 110 kV substations are presented,according to the form of the power distribution unit the typical design is divided into three basic schemes for outdoor,indoor and semi-subterranean substation respectively.

Analysis on present construction situations of underground substation;

Operational problems for large underground substations and relevant countermeasures;

Application of uplift piles with hole expansion end to anti-floating design for underground substations;

Because the 500 kV underground substation has such characters as deep underground,and difficult for fire fighting and smoke ventilation,etc.

Analysis on influence of flow velocity-flow regime and sedimentation on operation of underground hydropower station of Three Gorges Project;

Its underground hydropower station is located in the layered rocks in soft and hard rocks check.

The main powerhouse of Three Gorges underground hydropower station is with large span and thin cover, and it is rare internationally.

Key concrete construction technology of TGP s underground power station on left bank;

Analysis on tailrace system with varying crown elevation of TGP s right bank underground power station;

7 auxiliary transformer of Jingpohu Hydropower Plant underground power station in cave entrance is act as important power supply of network controlled switching station.

Hydrodynamic characteristics of changing top-altitude tailrace tunnel for Three Gorges Project s underground power plant;

Before the excavation of diversion tunnel of the right-bank underground power plant of the Three Gorges Project,the reservoir has started its initial impoundment.