The reporter learned from the State Grid Gansu Provincial Electric Power Company that on May 4th, the Changji-Guquan ±1100 kV UHV DC transmission project in Shandan County, Gansu Province, was successfully connected to the U.S. Tower with the last two large-section conductors. The world's highest voltage transmission line project in Gansu achieved full-line penetration.
Gansu section construction site. Lanzhou Morning Post
According to reports, the Changji-Guixun ±1100 kV UHV DC transmission project is the UHV power transmission project with the highest voltage level in the world, the largest transmission capacity, the longest transmission distance, and the highest technical level. The project was started in 2016, and the total length of the line was 3319.2 thousand. The meters pass through Xinjiang, Gansu, Ningxia, Shaanxi, Henan and Anhui provinces. It is expected to be put into operation by the end of this year.
Changji-Guquan ±1100 kv UHVDC transmission line project passes through Jiuquan, Zhangye, Wuwei, Jinchang, Baiyin, Pingliang, and Qingyang in Gansu Province. The total length of the line is 1279.6 kilometers, accounting for more than one-third of the total length of the line. There is a total of 2289 towers. Base, crossing Gobi, deserts, hills, high mountains, wetlands, woodland and other terrain.
Guo Xuejian, deputy director of the Ministry of Construction of the State Grid Gansu Electric Power Co., Ltd., said that during this project, many construction bids in the Gansu section passed through uninhabited areas, and there were many crossovers across the Yellow River, electrified railways, highways, oil and gas pipelines, and 35 kV. And above power lines 104 times.
It is understood that after the Changji-Guixue ±1100 kV UHV DC transmission project is put into operation, the transmission power can reach 12 million kilowatts, which will promote the thermal power, wind power, and solar power generation in the energy bases in the western regions of China to be bundled and sent to the east and the middle each year. The transmission of electricity was approximately 66 billion kilowatt-hours, reducing the transport of coal by more than 30 million tons, emissions of 24,000 tons of smoke and dust, 149,000 tons of sulfur dioxide, and 157,000 tons of nitrogen oxides.