Foundation pouring for the first tower of Xinjiang section of Hami-Chongqing ±800kV UHV DC transmission line-Qingdao Haineng Electric Power Equipment Co.,Ltd.

Foundation pouring for the first tower of Xinjiang section of Hami-Chongqing ±800kV UHV DC transmission line

2023-11-04

Urumqi, China, October 28 (Rolling Yan Gong Yanlong Guo Zhiwen) about 30 kilometers from the construction site in Yigu County, Xinjiang, on the 27th, with the roar of the concrete pump trucks, concrete is slowly injected into the mold, the Hami-Chongqing ± 800 kV ultra-high voltage direct current transmission line project in Xinjiang is the first section of the tower foundation pouring pilot operations, marking the project has officially entered the stage of full-scale construction. Hami-Chongqing ± 800 kV UHV DC transmission project is one of the 102 major projects identified in the national "14th Five-Year Plan" development plan, is an important part of the "Xinjiang power into Chongqing" project, but also "Xinjiang power outflow It is an important part of the "Xinjiang Power to Chongqing" project, and also the third channel of "Xinjiang Power Sent Outside China" direct current. The project starts from Hami, Xinjiang and ends at Yubei District, Chongqing, with a dynamic investment of 28.6 billion yuan, and a total line length of about 2290 kilometers, with a rated voltage of ± 800 kilovolts and a rated transmission capacity of 8 million kilowatts. Xinjiang section of the project started in Hami North converter station, stopping at the new Gan provincial boundary, via Hami City, Barkun County, Iwu County, Yizhou District and thirteen divisions of Xinxing City, Hongshan Farm, the line length of about 348.594 kilometers, the new tower of 679 bases.

It is understood that Hami, as the country identified seven ten million kilowatts of wind power base and one of the four major coal bases in Xinjiang, is one of the few large-scale development of clean energy and coal power at the same time large-scale development of energy bases, the development of obvious advantages. Chongqing Municipality is an important political and economic center in the western region, power security has long been in a tight balance, the realization of Hami power transmission to Chongqing, not only can make full use of high-quality wind and solar energy resources in the Hami area, to promote the development and transformation of advantageous energy resources in the western region, expanding the scope of use of high-quality energy resources, but also strengthen the power supply capacity of Chongqing, which will help to optimize the pattern of energy supply in the southwest region, to provide energy security for regional economic development. Provide energy security for regional economic development.

Since 2010, the State Grid Corporation started the work of "Xinjiang Electricity Sending Out", and has built the first and second channel of 750kV for connecting Xinjiang to the main grid of Northwest China, Changji - Guquan ± 1100kV UHV DC transmission project, Hami South - Zhengzhou ± 800kV UHV DC transmission project, and the first channel of 750kV for connecting Xinjiang to the main grid of Northwest China. 800kV UHV DC transmission project, "two cross and two straight" transmission channel. The "Xinjiang power into Chongqing" project is the third ultra-high voltage DC project in Xinjiang, after the commissioning will help Xinjiang become the largest new energy transmission base in the country, the formation of the transmission scale of more than 33 million kilowatts of the "three straight and three intersections" transmission channel, through the three major DC Send power to the southwest, east China, central China power grid, three 750 kV AC send power northwest load center, strong service to the national security supply situation, bigger and stronger Xinjiang modern energy economy.

It is reported that the project has 316 kilometers of line is located in Xinjiang, one of the nine windy areas of the three ponds Lake - Nao Mao Lake wind area, where the design wind speed of 38 meters per second, windy weather throughout the year as many as 115 days, the construction of the project is faced with sandy winds and sandy, safety risks and other difficulties.

"Construction, we will combine the characteristics of the local wind season, reasonable arrangement of construction plans, pay close attention to the weather, all sites are equipped with wind meter, adjust the work task at any time. If necessary, we will reasonably increase the input of personnel and machinery to ensure that the construction progress meets the milestone plan." According to the project manager Xu Yubo, considering the project has 23.4 kilometers of line over the East Tianshan Mountain, the project construction will increase the water mill drilling, submersible drilling and other machinery and equipment inputs for the foundation excavation operations, to improve the overall construction efficiency. At the same time, the saline corrosive sections, the use of high-strength concrete, the selection of corrosion-resistant graphite grounding materials to solve the problem of saline corrosion.

It is reported that the project put into operation after the annual transmission of electricity to Chongqing over 36 billion kilowatt-hours, help Chongqing to form a cross has been ultra-high-voltage transmission channel mutual power supply to ensure that the new pattern of external power into Chongqing, build water, fire, wind, light multiple power mutual aid system, significantly enhance the Chongqing power grid supply capacity, can replace the consumption of 6 million tons of coal, carbon dioxide emission reduction of 16.5 million tons per year.

Priv: Meeting of the Political Bureau of the CPC Central Committee: To accelerate the development of wind power, photovoltaic, nuclear power and other clean energy.

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