In Qiaoren Township, Qitai County, the staff of Hunan Power Transmission and Transformation Engineering Company is operating the tension machine to display the conductor. This is the first wire exhibition site of Changji-Guquan ±1100 kV UHV DC transmission line project (Xinjiang section). This also marks the last stage of the construction of the world's first ±1100 kV UHV DC transmission line.
“Xinjiang section started to resume work in March this year. It has entered the peak period of the tower assembly. It is expected that the tower will be completed by the end of August. With the first conductor exhibition, the Xinjiang section will gradually enter the construction stage of the line, and it is expected that the end of this year. All the previous completion of the wiring project." Xu Yubo, deputy manager of the project department of the Construction Management Center of the Economic and Technological Research Institute of Xinjiang Electric Power Company.
Changji-Guquan ±1100 kV UHV DC transmission line project is the UHV transmission project with the highest voltage level, the largest transmission capacity, the longest transmission distance and the highest technical level in the world, passing through Xinjiang, Gansu, Ningxia, Shaanxi, Henan and Anhui. 6 provinces (districts). The project will build two ±1100 kV converter stations in Changji and Guquan, with a new commutation capacity of 24 million kilowatts, a new transmission line of 3,304 kilometers, and a dynamic investment of 40.7 billion yuan.
The Xinjiang section starts from the ±1100 kV Changji Converter Station and ends at the Hongliuhe Railway Station at the Xingan junction, passing through 4 counties (cities) such as Jimsar County, Qitai County, Mulei Kazakh Autonomous County and Hami City. The total investment of the project is 450.343 million yuan, the transmission line is 598.684 kilometers long, and there are a total of 1109 towers. It is planned to be completed and put into operation in June 2018.
It is understood that the Xinjiang section is dominated by deserts, Gobi, and mountainous areas. The climatic environment and geographical environment are harsh, which brings great challenges to construction technology and equipment.
At the site of the line, many representatives of the construction units of the other sections were deployed around the wire. "This is the world's first ±1100 kV UHV DC transmission line project, which is also a new challenge for our construction unit. This project is currently the most demanding in terms of safety, quality and technical standards in transmission line engineering." Hunan Yang Fang, chief engineer of the construction project department of the 2nd tender section of the Changji-Guquan ±1100 kV UHV DC transmission line project of the provincial transmission and transformation engineering company.
The reporter saw at the construction site that the tall iron towers extended in an orderly manner with an average span of 560 meters, and eight 1250 square millimeter large-section conductors slowly rose under the traction rope drag. Due to the high voltage level, many new technologies and materials were used in the construction of the project. "Like this 1250 square millimeter large section wire is the first time it is used in the construction of Xinjiang power grid." Xu Yubo said.
This project is the second UHV transmission project of “East Power Transmission†after the Haminan-Zhengzhou ±800 kV UHV DC transmission project in Xinjiang. It is another milestone project for the innovation and development of UHV DC transmission technology in China and the world. . After the project is put into operation, it can transfer 66 billion kWh of electricity per year to the East China region, equivalent to transporting 30.24 million tons of coal, which can reduce emissions of 59.4 million tons of carbon dioxide, 149,000 tons of sulfur dioxide and 157,000 tons of nitrogen oxides.
"Implementing 'East Power Transmission' will effectively promote the intensive development of Xinjiang's energy base, promote the joint delivery of thermal power, wind power and solar power, improve the efficiency of resource utilization, expand the scope of new energy consumption, and effectively promote the transformation of local resource advantages into the economy. Advantages. Wang Jinsuo, deputy director of the Construction Management Center of the Economic and Technological Research Institute of Xinjiang Electric Power Company.
It is reported that since the first "East Power Transmission" UHV project, that is, the Haminan-Zhengzhou project has been put into operation, the cumulative transmission of electricity has reached 38.3 billion kWh, accounting for more than 90% of Xinjiang's power transmission, and has exerted great benefits.
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