State Grid Releases UHV National Standards

At the commendation meeting of the UHV AC/DC demonstration project held on the 12th, it was learned that the 1,000 kV Jindongnan-Nanyang-Jingmen UHV AC pilot demonstration project built by the State Grid Corporation passed the national inspection and acceptance in the near future, and the State Grid was constructing the project. The UHV AC transmission technology standard system consisting of 7 categories and 77 standards was proposed.

In addition, the “Twelfth Five-Year Plan” period will also be an important period for the development of UHV power grids, and the State Grid plans to accelerate the construction of “Three Chinas” UHV AC synchronous power grids.

Announced a number of UHV national standards A few days ago, China’s 1000 kV AC transmission and transformation project with complete independent intellectual property rights in Jindongnan-Nanyang-Jingmen UHV AC pilot demonstration project was recently approved by the state. The localization rate of the equipment in this project reached 90%. This means that China has begun to fully grasp the core technology of UHV AC transmission.

In addition, the demonstration project of 800-kilovolt HVDC transmission project from Xiangjiaba to Shanghai, which has just been put into operation, can deliver 32 billion kilowatt-hours of hydropower to Shanghai each year.

Through engineering practice, the State Grid Research Institute has proposed 7 technical standards systems for 77 UHV AC transmission standards, revised 1 national standard, issued 15 national standards and 73 corporate standards, and has received 431 patents ( It has been authorized 237) and established China's leading position in the field of UHV transmission technology research, equipment manufacturing, engineering design, construction and operation.

At the same time, the national grid is also pushing its UHV related standards to the international effort. Liu Zhenya, general manager of the State Grid, said that the State Grid has now compiled four international standards, including UHV AC voltage standards.

Analysts said that the State Grid released and revised some national standards for UHV, which will have a major impact on domestic power equipment manufacturers. With the planned construction of UHV lines in succession, the relevant equipment market will usher in expansion. , And equipment manufacturers need to follow the adjustment of UHV technology.

The relevant person of the State Grid will implement three vertical and three horizontal and one ring. The "12th Five-Year Plan" period is an important stage for the development of China's UHV power grid. On the basis of the UHV AC pilot demonstration project, the "Three China" UHV will be accelerated. AC synchronous power grid construction.

By 2015, the “Three Chinas” UHV power grid will form a “three vertical and three horizontal and one ring network”. The Ximeng, Mengxi, Zhangbei and Northern Shaanxi energy bases will send them to Sanhua through three longitudinal UHV AC channels. Electricity, north coal power, southwest hydropower through the three horizontal UHV AC channel to North China, Central China and the Yangtze River Delta UHV ring transmission.

In 2020, with the “Three Chinas” UHV synchronous power grid as the center, the northeast UHV power grid and the northwest 750 kilovolt power grid will be completed.

With the large-scale development of hydropower in the future, the construction of corresponding UHV lines will also accelerate.

Cao Guangjing, Chairman of China Three Gorges Corporation, stated at the meeting that currently the hydropower technologies in Sichuan and Yunnan have exceeded 100 million kilowatts. It is estimated that by 2020, the scale of hydropower development and transport in the southwest will reach 60 million kilowatts. Power transmission distances in East China and Central China load regions will reach 2000-3000 kilometers.

Cao Guangjing said that in the future, the Three Gorges Group will continue to develop several Xiangjiaba and Xiluodu hydropower stations in the lower reaches of the Yangtze River. Therefore, the construction of large-capacity, long-distance, and low-loss UHV transmission lines is an inevitable choice for securing hydropower output.