The mobilization meeting for the commencement of the grid interconnection project between ali and Tibet was held in Lhasa, Tibet. The construction of the project will completely end the long history of operation of the isolated network of ali power grid and provide power guarantee for the overall national development strategy and border security. The project is planned to be completed and put into operation in 2021.

The power network project between ali and Tibet is the highest and most challenging power transmission and transformation project in the world so far. The construction environment is extremely harsh and the environmental protection requirements are extremely strict. The average elevation of the tower is 4572 meters, and the highest elevation is 5357 meters. The zaga 220kv substation and 220kv zhongba - hall transmission line are the highest 220kv transmission lines in the world. Engineering 3 times across the Brahmaputra, over 5300 meters above sea level, Ma Youmu mountain, mount Kong Tang lahm crossing permafrost area, and no one less people area, marsh, along the weather, mainland oxygen content is only 50%, 60%, the average temperature 0-5 degrees Celsius, more than 25 degrees Celsius temperature gap between day and night, year period only 6 months, especially at an altitude of 4500 meters above the area less than 5 months valid period, also faces during the permafrost swamp area in winter 120 base iron tower foundation construction of extremely difficult.

The project starts from the dolin 220kv substation in sanzhuzi district of xigaze city and ends at the 220kv barr substation in gar county of ali region, spanning 10 districts and counties of 2 prefectural cities in xizang. The total investment of the project is 7.4 billion yuan, and the transmission line length is 1,689 kilometers. During the peak period of construction, hundreds of participating units will participate in the construction, and the peak period of all participating personnel will reach more than 30,000. Editor/zhao jing