Energy Wonders of The World: China’s UHVDC Transmission Line, The First To Surpass The One-Megavolt Hurdle

The Changji-Guquan Transmission Link is a 2,000-mile engineering marvel operating at 1,100 kV, making it the highest-voltage transmission line in the world and the first to surpass 1MV. The project was finished in 2019, and amazingly - it was constructed in just three years.

With the ability to carry 12 Gigawatts (GW) of power, an amount of power that would meet the needs of 50 million Chinese or 12 million US homes, the line acts as a high-capacity bridge, funneling electricity from China’s massive energy hubs in the west, through deserts and mountains, to the dense industrial and population centers in the east.

As global grid constraints demand more innovation and investment, The Changji-Guquan UHVDC transmission line has solidified its place as an energy wonder of the world.

An Infrastructure Solution To Transmit Massive Volumes of Renewable Energy Generated In Remote Regions, Into Robust Economic Regions

The Changji-Guquan link brings electricity full circle. While the Direct Current favored by Edison century's ago lost to AC due to transmission limits, losses and safety, modern semiconductors and microprocessors have enabled advances that were considered impossible, up until recently.

The semiconductor and microprocessor advances make it possible to safely convert massive DC voltages back to AC at the destination, resulting in the movement of renewable energy across large distances. Prior to the building of the UVVDC lines, a large portion of the renewable energy generation was wasted, since there was no way transmit it across the country.

Part of An Electricity Super Highway That Is Opening A New Era of Grid Possibilities

While the Changji-Guquan Link remains the crown jewel, it is now part of a vast electricity superhighway with 45 UVHDC lines spanning over 40,000 kilometers. Through this, China has established global leadership in a vital, albeit not always visible, grid technology.

Although UHVDC lines may not fit everywhere, since they require land usage rights and strict safety clearances, they are becoming a welcome solution in nations like Brazil and India that need to connect remote renewables with urban population centers.

Ultimately, the underlying technologies used to manage the DC-to-AC conversions across Ultra High Voltage transmission lines will be integrated into many new applications, ranging from AI data centers to electrified transportation.