New infrastructure

Hami-Chongqing ±800kV UHVDC transmission project is about to start construction

Seetao 2022-08-16 14:28
  • The project is designed to have a transmission capacity of 8 million kilowatts and a transmission distance of about 2,283 kilometers
  • After completion, it will further strengthen Xinjiang's cross-regional power transmission capacity
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Recently, a reporter from learned from the State Grid Hami Power Supply Company that as of now, the Hami-Chongqing ±800 kV UHVDC power transmission project has initially completed on-site investigation and site selection and line selection, and will start construction in 2022.

Hami-Chongqing ±800kV UHV DC Transmission Project

According to reports, the Hami-Chongqing ±800 kV UHV DC transmission project is an important part of the three AC and nine direct projects of China's West-to-East Power Transmission Project, and it is also the third DC channel for Xinjiang power transmission. Hami is one of the seven 10 million kilowatt-level wind power bases determined by the state and one of the four major coal bases in Xinjiang. It is one of the few large-scale energy bases in China that can simultaneously develop clean energy and coal power on a large scale. Chongqing is an important political and economic center in Southwest China, and power security has been in a state of tight balance for a long time.

In May 2020, considering the balance of power supply and demand, the State Grid Corporation of China launched the feasibility study of Xinjiang power into Chongqing project. The project design transmission capacity is 8 million kilowatts. It is planned to build an 8 million kilowatt converter station in Xinjiang and Chongqing. The line passes through five provinces (regions and cities) of Xinjiang, Gansu, Shaanxi, Sichuan and Chongqing, with a transmission distance of about 2283 kilometers. Among them, the line in Xinjiang is 358 kilometers. The sending converter station is located in Balikun Kazakh Autonomous County, and the receiving converter station is located in Yubei District, Chongqing. The line passes through the first district and two counties of Hami, and the project design fully considers the ecological protection along the line.

According to Sun Xueyong, Deputy Chief Engineer and Chief Design Officer of China Electric Power Construction Group Jiangxi Electric Power Design Institute Co., Ltd., during the project construction, great attention will be paid to ecological environmental protection, and some important protected areas and ecologically sensitive areas will be avoided and minimized as much as possible. Impact on the natural environment. The biggest highlight of the project is to increase the proportion of new energy power. It is initially planned that the installed capacity of thermal power is 4 million kilowatts, the installed capacity of wind power is 6.8 million kilowatts, and the installed capacity of photovoltaic power is 1.7 million kilowatts. The installed capacity of new energy accounts for 68%. Supporting the construction of energy storage devices. The implementation of the project not only promotes the development and transformation of advantageous energy resources in the western region, but also helps to optimize the energy supply pattern in the southwestern region.

Li Zhipeng, deputy director of the Development Planning Department of State Grid Hami Power Supply Company, said that the Hami-Chongqing ±800 kV UHV project is an important project to speed up the implementation of Xinjiang's power transmission strategy, which is conducive to extending the coal industry chain in Xinjiang, strengthening Hami's new energy industry, and driving The construction of the Hami energy base and the demonstration area of Shanbei two counties can also promote the low-carbon transformation of energy and serve the dual-carbon goal. After the completion of the Xinjiang Power Project into Chongqing, it will further strengthen the cross-regional power transmission capacity in Xinjiang. The installed capacity of supporting thermal power and new energy will exceed 10 million kilowatts. It is expected to increase the external power transmission by more than 40 billion kilowatt-hours each year, which can drive Hami’s GDP growth by about 2.5 percentage points. , play a role in promoting energy conservation, emission reduction and low-carbon development in China. Editor/He Yuting