SOURCE / PRESS RELEASE
State Grid Zhumadian-Wuhan 1,000 kV UHV AC transmission project put into operation
At 20:48 on November 26, the 1,000-kilovolt Zhumadian-Wuhan ultra-high voltage (UHV) alternating current (AC) power transmission project successfully completed a 72-hour trial and was put into operation, marking a new milestone in the forming of an UHV AC loop network shaped like the Chinese-character "日" (sun) in Central China. It offers stronger guarantee for the improvement of winter supply and mutual assistance capabilities between Henan and Hubei provinces.
The Zhumadian-Wuhan project is the most invested power grid infrastructure project with highest voltage level, and largest transmission capacity in Henan since its post-disaster reconstruction. The project started construction on March 25, 2022, with a total investment of 3.8 billion yuan. It adopts independently developed and internationally leading UHV transmission technology, which has outstanding advantage of large transmission capacity that can travel long distance with low power losses and less land occupation. The 281-kilometer-long project starts from the 1,000-kV UHV Henan converter substation in Zhumadian and ends at the 1,000-kV UHV Wuhan converter substation.
The project is an important part of UHV main gridand will be significant to the high-quality development of the economy and society in Central China. It will not only promote complementary supply of wind power, photoelectricity, hydroelectricity, thermal energy among provinces in this region, improve the safety and stability of power grid, but also ensure the large-scale input of clean energy in the western and northern regions, and effectively meet the growing demand for electricity in Central China during the 14th Five-Year Plan period (2021-25).
In order to implement the action plan of the State Council to peak carbon dioxide emissions before 2030, the National Development and Reform Commission issued a pilot construction plan on October 20, saying that China "will carry out carbon-peaking pilot projects in 15 provinces and regions including Henan, Hubei and Hunan, exploring paths toward carbon-peaking for cities and zones nationwide with different resource endowments and development foundations, providing actionable, replicable and promotable experience and practices for the whole country, thus contributing to reaching peak carbon emissions and achieving carbon neutrality."
The operation of the project can not only meet the needs for regional power grid development, but also reduce power transmission losses, achieving efficient use of transmission-line corridors and land resources. It is a concrete manifestation of building a "resource-saving and environment-friendly" power grid. The project can significantly improve the environmental quality of Central China, promote the use of green and low-carbon energy, improve energy utilization efficiency and contribute to winning the battle for defending the blue sky.
During the construction of the project, the State Grid Henan Electric Power Company fully implemented the requirements of "once successfully operated, long-term safe operation guaranteed." During the construction, it overcame many difficulties and unfavorable conditions such as "multiple crossings, high construction difficulty, strict control requirements and high safety risks," in line with the spirit of craftsmanship and "iron army of power grid." The company seeks benefits from management, and fully enhances the level of construction and management to ensure the construction of "safe, reliable, independent innovation, environmentally friendly and world-class" high-quality projects.
At the same time, the State Grid Henan Electric Power Company innovatively adopts the "three photos and one map" working method, establishes a stable "golden triangle" of "personnel performance, on-site control, safety rewards and punishments," strictly implements the "single foundation planning" of environmental and water conservation construction, and assists in the use of "sky and earth integration" technology supervision methods to control temporary land disturbance and reduce vegetation damage, ensuring intrinsic safety and reliability.
Now, the State Grid has completed a total of 34 UHV projects, including "18 AC and 16 DC" projects, forming a cross regional transmission capacity of 130 million kilowatts of UHV direct current. The preliminary construction of UHV AC backbone grids in East China, North China and Central China has created conditions to ensure safe and reliable power supply and support the transformation of the national energy structure.
(The authors are Yu Lei and Huang Jianjin from State Grid Henan Electric Power Company)
The Zhumadian-Wuhan project is the most invested power grid infrastructure project with highest voltage level, and largest transmission capacity in Henan since its post-disaster reconstruction. The project started construction on March 25, 2022, with a total investment of 3.8 billion yuan. It adopts independently developed and internationally leading UHV transmission technology, which has outstanding advantage of large transmission capacity that can travel long distance with low power losses and less land occupation. The 281-kilometer-long project starts from the 1,000-kV UHV Henan converter substation in Zhumadian and ends at the 1,000-kV UHV Wuhan converter substation.
State Grid Henan Electric Power Company employees conduct high-altitude line-hanging operations. Photo: Wang Cunfang
The project is an important part of UHV main gridand will be significant to the high-quality development of the economy and society in Central China. It will not only promote complementary supply of wind power, photoelectricity, hydroelectricity, thermal energy among provinces in this region, improve the safety and stability of power grid, but also ensure the large-scale input of clean energy in the western and northern regions, and effectively meet the growing demand for electricity in Central China during the 14th Five-Year Plan period (2021-25).
In order to implement the action plan of the State Council to peak carbon dioxide emissions before 2030, the National Development and Reform Commission issued a pilot construction plan on October 20, saying that China "will carry out carbon-peaking pilot projects in 15 provinces and regions including Henan, Hubei and Hunan, exploring paths toward carbon-peaking for cities and zones nationwide with different resource endowments and development foundations, providing actionable, replicable and promotable experience and practices for the whole country, thus contributing to reaching peak carbon emissions and achieving carbon neutrality."
Employees of State Grid Henan Electric Power Company inspect in converter substation in southern Henan. Photo: Hou Panke
The operation of the project can not only meet the needs for regional power grid development, but also reduce power transmission losses, achieving efficient use of transmission-line corridors and land resources. It is a concrete manifestation of building a "resource-saving and environment-friendly" power grid. The project can significantly improve the environmental quality of Central China, promote the use of green and low-carbon energy, improve energy utilization efficiency and contribute to winning the battle for defending the blue sky.
During the construction of the project, the State Grid Henan Electric Power Company fully implemented the requirements of "once successfully operated, long-term safe operation guaranteed." During the construction, it overcame many difficulties and unfavorable conditions such as "multiple crossings, high construction difficulty, strict control requirements and high safety risks," in line with the spirit of craftsmanship and "iron army of power grid." The company seeks benefits from management, and fully enhances the level of construction and management to ensure the construction of "safe, reliable, independent innovation, environmentally friendly and world-class" high-quality projects.
At the same time, the State Grid Henan Electric Power Company innovatively adopts the "three photos and one map" working method, establishes a stable "golden triangle" of "personnel performance, on-site control, safety rewards and punishments," strictly implements the "single foundation planning" of environmental and water conservation construction, and assists in the use of "sky and earth integration" technology supervision methods to control temporary land disturbance and reduce vegetation damage, ensuring intrinsic safety and reliability.
Now, the State Grid has completed a total of 34 UHV projects, including "18 AC and 16 DC" projects, forming a cross regional transmission capacity of 130 million kilowatts of UHV direct current. The preliminary construction of UHV AC backbone grids in East China, North China and Central China has created conditions to ensure safe and reliable power supply and support the transformation of the national energy structure.
(The authors are Yu Lei and Huang Jianjin from State Grid Henan Electric Power Company)
RELATED ARTICLES
