Beijing Post

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Monday, Oct 13, 2025

China's Zhundong-Wannan UHVDC Project Achieves Milestone in Power Transmission

Asia's Largest Power Transmission Line Advances China's Energy Efficiency and Sustainability Goals
In a significant development for China's energy infrastructure, the Zhundong-Wannan ±1100 kV ultra-high-voltage direct current (UHVDC) transmission project has successfully transmitted 300 billion kilowatt-hours (kWh) of electricity since it commenced operations in 2019. This remarkable figure underscores China's commitment to improving its power distribution framework, enhancing energy efficiency, and reducing carbon emissions.

The Zhundong-Wannan project, hailed as a pioneering initiative by the State Grid Anhui Electric Power Co., Ltd., is pivotal in transferring electricity from the resource-rich northwest region of Xinjiang to more industrially developed areas in eastern China.

The transmission line originates in Changji Hui Autonomous Prefecture, Xinjiang, extending across several provinces and concluding in Xuancheng City, Anhui.

It epitomizes technological advancement with its unparalleled voltage level, significant transmission capacity, and extensive coverage distance, positioning it as the most prominent UHVDC project worldwide.

This project is crucial not just for its scale, but for its role in China's broader energy strategy.

By transferring power equivalent to the annual energy requirement of 133 million households, the project curtails the use of approximately 90 million tonnes of standard coal.

Consequently, it mitigates carbon dioxide emissions by more than 255 million tonnes in eastern China.

Such achievements align with China's environmental objectives by contributing to cleaner and more sustainable energy consumption patterns.

Since its initiation, the Zhundong-Wannan UHVDC line has notably amplified the flow of renewable energy from Xinjiang to the eastern provinces.

The project leads UHVDC installations nationwide, maintaining the highest outbound electricity transmission figures for four consecutive years.

This operational consistency emphasizes the project's role in supporting China's renewable energy targets while bolstering the nation's grid reliability and stability.

The achievements of the Zhundong-Wannan initiative signal China's rigorous pursuit to modernize its energy infrastructure.

As global attention increasingly focuses on sustainable development, this project serves as a testament to China's active participation in combatting climate change.

As the world’s largest energy consumer, China's strategies in expanding renewable energy and optimizing electricity transmission possess significant global implications, influencing energy policies beyond its borders.
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