The cross-regional UHV put into operation in China has the following 17

Electricity is an important foundation for social economy and life development. Combined with the objective requirements of China's resource distribution and productivity distribution, China is gradually improving the "West-to-East Power Transmission" pattern, taking the resource advantages of the western region as an economic advantage and providing a solid foundation for the development of the eastern region. Energy security, in 2017, the country's cross-regional power transmission reached 423.5 billion kWh, an increase of 12.1% year-on-year, and the inter-provincial power transmission was 1.13 trillion kWh, an increase of 12.7%. UHV built “eight crosses and 13 straights” and approved the “three crosses and two straights” project under construction. The length of the UHV project line under construction and approval is 32,000 kilometers, and the substation (commutation) capacity exceeds 320 million kVA. (kW), the three channels of the north, south and south of the West-East Power Transmission Channel have begun to take shape.

According to the regional division of the power grid, the UHV can be divided into trans-regional and regional ultra-high voltages. Among them, the northwestern region forms the Mengxi-Tianjin South, Ximeng-Shengli, Shanghai Temple-Shandong two vertical and one horizontal networks, and the East China Power Grid is formed internally. Huaihu UHV ring network.

There are 17 inter-regional UHVs that have been put into operation, as follows: