Workers from State Grid Baiyin Power Supply Company carry out construction. [Photo provided to chinadaily.com.cn]

The Baiyin section of the 330-kilovolt renewable energy transmission project supporting power transmission from Gansu to Shandong was completed and officially put into operation on Nov 29. This marks the full commissioning of the main power grid infrastructure project supporting the ±800kV Gansu-Shandong ultra-high voltage direct current (UHVDC) project, which will further optimize Gansu's energy structure and promote the development of its new energy system.

As a major national initiative under the 14th Five-Year Plan (2021-25), the project involved the expansion of intervals at two 750kV substations and the construction of four 330kV transmission lines. With a total newly built line length of 197.85 kilometers and 481 transmission towers erected, the project successfully connects 4.5 gigawatts of renewable energy projects in the Baiyin region to the UHVDC backbone grid, forming a seamless energy chain from resource development in the west to end consumption in the east via centralized grid transmission.

During construction, the team overcame challenges posed by complex terrain on the Loess Plateau and completed 191 crossings of major transport and power lines. During the peak construction period, over 1,000 workers were mobilized across more than 50 teams to ensure safe and efficient progress.

The Baiyin section of the 330-kilovolt renewable energy transmission project is officially put into operation on Nov 29. [Photo provided to chinadaily.com.cn]

With the project now fully operational, it is expected to deliver approximately 11 billion kilowatt-hours of green electricity annually from Gansu to Shandong and other central and eastern regions. This is equivalent to saving 3.5 million metric tons of standard coal and reducing carbon dioxide emissions by 9 million tons each year, playing a significant role in optimizing the national energy distribution, ensuring energy security, and promoting coordinated regional development.