China has put into operation its first ultra-high voltage (UHV) power line designed to transmit electricity from a mixed energy base that combines wind, solar, thermal, and battery storage. The project was jointly announced on May 8 by State Grid Corporation of China in events held in Jinan and Lanzhou.
Source: Xinhua News Agency
China has put into operation its first ultra-high voltage (UHV) power line designed to transmit electricity from a mixed energy base that combines wind, solar, thermal, and battery storage. The project was jointly announced on May 8 by State Grid Corporation of China in events held in Jinan and Lanzhou.
The ±800-kilovolt direct current (DC) line connects Longdong in Gansu Province with Tai’an in Shandong Province, forming part of the country’s massive “West-to-East Power Transmission” effort. More than half of the electricity carried by the line comes from renewable sources, including wind, solar and battery-stored energy.
Capable of delivering 36 billion kilowatt-hours annually, the line is expected to help meet Shandong’s rising power demand. "This UHV line functions like a superhighway for electricity," said Zhang Zhigang, Chairman of State Grid. "It enables large-scale, long-distance and high-efficiency transmission, supporting the development of renewable energy bases in desert areas and helping drive economic growth in both Shandong and Gansu."
The project is backed by 14.5 gigawatts of installed capacity, including 10.5 GW from renewables. A key part of the system is the China Huaneng Longdong Energy Base, home to the world’s largest and most efficient carbon capture facility at a coal-fired power plant. The plant can capture up to 1.5 million tonnes of CO₂ each year—roughly equivalent to the annual emissions from 600,000 cars.
With the Longdong–Shandong line now online, China’s UHV network has expanded to 39 completed projects—22 AC and 17 DC—with a total length long enough to circle the Earth. The system forms the world’s most extensive UHV transmission grid, strengthening China’s energy security while advancing its low-carbon goals.
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