Qinghai-Tibet 750kV/+/-400kV AC/DC Grid Interconnection Project

Qinghai-Tibet 750kV/+/-400kV AC/DC  Grid Interconnection Project

Qinghai-Tibet Grid Interconnection Project is the Project composed of Xining-Riyue Mountain-Wulan- Gomud 750kV AC project and Gomud- Lhasa +/-400 kV DC power transmission project and other auxiliary projects, with a total investment of 16.286 billion Yuan. It will be put into operation in 2012.

The project is a transmission project, so far in the world, with the highest altitude and the largest construction scale in alpine region. It is the key project to meet the power demand of Qaidam's circular economy research area in Qinghai, to serve Qinghai's economic and social development, and to solve Tibet's power shortage. Through this project, Tibet grid will be interconnected with the northwest grid. Thus, SGCC will achieve, for the first time, the integration of all provinces in the service area, further improve the ability to optimize the large grid resource allocation, and help western region change resources advantages into economic advantages to achieve better and faster development.

In the project, 750 kV AC transmission project will build 750 kV Xining substation (by expansion), Riyue Mountain substation, Uran switching station, Golmud substation and 736.2 km Double Circuit Line on the same tower. Whereas, +/-400 kV DC transmission project will build Golmud, Lhasa converter stations and 1038 km line and forward transmission power of 600MW and1200MW respectively. In this project, the highest elevation is 5300m, and 87% of the construction area is above 4000m. The complex construction environment makes the construction extremely difficult.



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