China has officially broken ground on its first fully integrated offshore and onshore high-voltage direct current (HVDC) transmission project for offshore wind power, located off the coast of Yangjiang in southern Guangdong Province. Scheduled for completion in October 2026,
Source: CCTV News
China has officially broken ground on its first fully integrated offshore and onshore high-voltage direct current (HVDC) transmission project for offshore wind power, located off the coast of Yangjiang in southern Guangdong Province. Scheduled for completion in October 2026, the Yangjiang Sanshan Island project is also the first offshore wind transmission system planned and built entirely by a national grid operator.
The project consists of both offshore and onshore infrastructure. A ±500 kilovolt offshore converter station will be constructed at sea to collect up to 2 gigawatts of wind-generated electricity from the surrounding waters. That power will travel 115 kilometers via an undersea HVDC cable to a landing station in Yangjiang, before continuing on overhead HVDC lines to a receiving terminal in Jiangmen. From there, it will feed into the power grid serving the Guangdong-Hong Kong-Macao Greater Bay Area.
Once operational, the system is expected to deliver around 6 billion kilowatt-hours of clean electricity annually—enough to replace roughly 1.74 million tonnes of standard coal and cut carbon dioxide emissions by an estimated 4.63 million tonnes. It will play a key role in powering the Bay Area’s fast-growing economy with renewable energy.
The Sanshan Island project also represents a major shift in how China connects offshore wind to its grid. Instead of each wind farm building its own connection, this unified system acts like an energy expressway—consolidating multiple offshore wind farms into a single, shared transmission route. This reduces redundant infrastructure such as submarine cables and control stations, and helps make more efficient use of both sea and land resources. Guangdong has emerged as a national leader in offshore wind, with total installed capacity reaching 12.22 million kilowatts—the highest in China.
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