Shaanxi Power Grid entered the UHV era

Shaanxi Power Grid entered the UHV era
.
After the completion of the project, 40 billion kilowatt-hours of electricity can be transmitted from the wind power and solar power generation base in Hexi area of Gansu to Hunan every year, greatly improving the power supply reliability of the power
grid in central China and Hunan.

At present, the UHV project under construction in Shaanxi also includes the 1000 kV Shaanxi Yuheng to Shandong Weifang UHV project at the starting point of Shaanxi; The UHV projects transiting Shaanxi include± 800 kV Inner Mongolia Shanghai Temple to Shandong Linyi DC UHV, the world's highest voltage level ± 1100 kV Xinjiang Changji to Fujian Guquan DC UHV; Plus the previously built ± 800 kV Ningxia Lingzhou to Zhejiang Shaoxing DC UHV, Xinjiang Hami to Henan Zhengzhou DC UHV
.
Shaanxi has a total of 6 UHV projects starting point and transit, distributed in southern Shaanxi, northern Shaanxi and Guanzhong three Qin lands, Shaanxi power grid has fully entered the UHV era, better play the role of the hub of power transmission in the eastern and western power grids, and continuously transmit clean energy such as coal power, hydropower, wind power and photovoltaic power in the west to the eastern load center, better serve the development strategy of "rich Shaanxi, harmonious Shaanxi and beautiful Shaanxi" and the construction of China's energy Internet, and promote the steady economic and social development of the eastern region
。

Among them, the 1000 kV Shaanxi Yuheng to Shandong Weifang UHV project is the first and first "west-to-east power transmission" UHV artery in Shaanxi and the first in northern Shaanxi to span the four provinces of Shaanxi, Jin, Hebei and Lu, undertaking important power transmission tasks in eastern North China, is one of the 12 key transmission channels in China's air pollution prevention and control action plan, and is the UHV AC transmission and transformation project with the longest transmission distance in China.
The new substation capacity is 15,000 megavolt-amperes, and about 1,048.
5 kilometers of double-loop 1,000 kV AC transmission lines are newly built, with a total dynamic investment of 24.
2 billion yuan
.
In Yuheng Industrial Park, Tawan Town, Hengshan County, Yulin City, 1 1000 kV Yuheng switch station will be built, covering an area of 5.
13 hectares within the wall, with a transmission line length of 2×149.
5 kilometers and a tower of 496 bases
。 After completion, it will give full play to the advantages of large capacity, long distance, multiple landing points and network functions of UHV transmission, incorporate Shaanxi power into the UHV power grid for unified consumption, improve the power transmission capacity of Yuheng Coal Power Base in northern Shaanxi, meet the power demand of load centers in Beijing-Tianjin-Hebei and even central and eastern China, and realize efficient and clean utilization of coal resources and large-scale consumption, which is of great significance to alleviate the shortage of
power supply and improve the ecological environment in Beijing-Tianjin-Hebei.

State Grid Shaanxi Power Transmission and Transformation Company constructed a 1000 kV Yu Heng to Weifang Shaanxi 4 lot, located in Suide County, the section is 2×43 kilometers long, and the iron tower is 139 bases
.
In view of the complicated terrain and inconvenient transportation, they calculated the economic account, repaired nearly 1,000 kilometers of the road up the mountain, and directly transported the construction materials to the tower, improving the transportation conditions
of the local people.
They implement mechanized construction measures such as mechanical excavation of foundation pits, commercial concrete pouring, crane towers, and aircraft pay-offs to reduce safety risks, improve construction efficiency, and accelerate construction progress
.
Each phase of this project is 8 split 630 square millimeters of large section wire
.
In view of the problems of multiple conductor splits and difficult arc sag control, they adopted the wire erection technology of two large tractors and four tension machines to display 8 wires at the same time, mobilized a team of more than 500 people to participate in the construction, and used UAV to display the guide rope, which saved time, effort and high efficiency, protected the original vegetation and crops, reduced local coordination work, and promoted the progress
of UHV construction.