News
Shangyuan Power Technology Co., Ltd.
26
2023
-
12
China will build the world's largest DC transmission project
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Recently, at the 8th International HVDC User Conference held in Yichang, Hubei, Shu Yinbiao, deputy general manager of State Grid Corporation, revealed that by 2020, my country will build 15 UHVDC transmission projects and become the world's DC transmission projects. The country with the most, the longest transmission line, and the largest capacity.
Shu Yinbiao said that the State Grid Corporation is stepping up the implementation of the "one special three major" strategy of UHV power transmission and large nuclear power, large hydropower, and large coal power, with the purpose of optimizing the allocation of energy resources. He said that the growth rate of China's electricity demand has exceeded 14% for three consecutive years. 80% of my country's hydropower resources are in the west, and more than 2/3 of the energy demand is concentrated in the eastern coastal areas. The use of ± 800 kV UHV DC transmission can realize long-distance and large-scale power transmission from west to east, which is important for the construction of resources. A conservation-oriented and environment-friendly power grid is of great significance to accelerate the optimal allocation of energy resources. He revealed that according to the plan, by 2012, ± 800 kV Xiangjiaba-Shanghai, Jinping-Sunan DC projects will be completed and put into operation; by 2020, Xiluodu-Zhuzhou, Xiluodu-West Zhejiang and other UHV DC projects will also Will be completed. By then, my country will build 15 UHV DC projects, including about 30 UHV DC converter stations, about 26000 kilometers of lines, and a transmission capacity of 94.4 million kilowatts. By the end of 2020, a UHV AC synchronous power grid covering North, Central and East China will be formed.
It is reported that DC transmission has been used in power systems for half a century. Compared with AC transmission, HVDC transmission has large transmission capacity, long distance, low transmission loss, and saves occupied corridors. At present, more than 70 DC transmission projects have been put into operation in the world. DC transmission is widely used in long-distance large-capacity transmission, submarine cable and underground cable transmission, and non-synchronous interconnection projects of power systems.
data show that as of October this year, china has completed and officially put into operation seven UHVDC transmission projects and Lingbao DC back-to-back projects, including Ge (Zhouba) Shanghai (Shanghai), San (Gorge) Chang (Zhou), San (Gorge) Guang (East), San (Gorge) Shanghai (Shanghai), Tian (Tianshengqiao) Guang (East), Gui (Zhou) Guang (East), etc, the total length of DC transmission lines is 7085 kilometers, and the transmission capacity is 18.56 million kilowatts. The total length and transmission capacity of DC transmission lines rank first in the world. At the same time, the design and construction, operation management and equipment manufacturing level of EHV DC transmission projects in China are also in the international leading position. All this has laid the foundation for the UHV transmission project.
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