Most people picture an offshore wind farm as a row of white towers standing in shallow water within sight of the beach. The next generation looks nothing like that. Seventy kilometers off the coast of Guangdong in southern China, over water more than fifty meters deep, a vast new wind project is taking shape in open sea — so far out that the turbines cannot be seen from land.
In late September 2026, the first turbines there were connected to the grid, and a transmission system described as the most powerful of its kind in the world began operating alongside them. It is a useful story to understand, because the hard part of offshore wind is no longer just building a tall turbine. It is surviving a hostile ocean and getting the electricity home without losing it along the way.
What Was Switched On
Let us start with the confirmed facts, reported by China Three Gorges, the developer, and by state broadcaster CCTV.
The project is the Yangjiang Qingzhou Phase 5 and Phase 7 offshore wind site, located south of Yangxi County in Guangdong. When complete it will have 163 wind turbines with a total installed capacity of 2 million kilowatts, or 2 gigawatts. The center of the site sits about 70 kilometers from shore in water deeper than 50 meters, where sea conditions are complex and rough.
On September 28, the first five turbines were successfully connected to the grid. At the same time, the project's flexible direct-current transmission system — the offshore link with the highest voltage level and largest transmission capacity in the world — went into operation. China Three Gorges called it a key step in the large-scale development of far-offshore, deep-water wind power.
Why Distance Makes Everything Harder
To see why this matters, compare it with an early offshore wind farm.
Close to shore, in shallow water, a turbine can be fixed to the seabed relatively simply, and the power it makes can travel a short distance through an ordinary cable. Move dozens of kilometers out into deep water and three problems arrive together. The structures must stand against bigger waves, stronger currents, salt-mist corrosion, and frequent typhoons. Installation is harder because the sea is rougher and the weather windows are shorter. And the electricity has much farther to travel, so simply sending it as alternating current wastes a growing share of the energy as heat and can destabilize the grid.
China's answer to the last problem is a piece of engineering called the "Heart of Sea Wind," an offshore converter station. Here is how the system works in plain terms. Each turbine generates alternating current at a lower voltage. That power is gathered through 66-kilovolt undersea collection cables and brought to the floating converter station, which steps the voltage up and converts the alternating current into direct current. From there, the electricity travels through a ±500-kilovolt undersea direct-current cable straight to a control center on land. Engineers said the team had to work through heavy waves, severe salt corrosion, and repeated typhoons to complete cable-laying, turbine testing, and system checks before the first units could be connected.
Why Direct Current Wins Over a Long Distance
The technical choice is worth a moment, because it is the key to the whole project.
There are two ways to move electricity: alternating current, or AC (Alternating Current), and direct current, or DC (Direct Current). Over short distances, alternating current is convenient because its voltage can be changed easily with transformers. But over very long undersea cables, alternating current builds up unwanted electrical effects that waste power and strain the equipment. High-voltage direct current avoids most of those losses, making it far more efficient across the 70-kilometer gap — though it requires expensive converter stations at both ends to switch the current back and forth. That is why the "Heart of Sea Wind" station and the ±500-kilovolt cable, rather than the turbines alone, are the genuinely record-setting parts of this project.
The Turbines Themselves Are Getting Enormous
The same week showed a second part of the trend: the machines are growing fast to capture more energy and cut costs.
On September 24, a separate project off Guangdong — the CGN Yangjiang Fanshi site, also 2 gigawatts — reached full capacity. It installed 33 of the country's first mass-deployed 18-megawatt offshore turbines, the largest model in batch deployment in China at that time. A turbine of that scale is built around a rotor more than two hundred meters across, standing taller than most skyscrapers, and it can produce far more electricity from a single foundation.
Bigger turbines help in two ways. Fewer machines are needed to reach the same total capacity, and fewer machines mean fewer foundations, less undersea cabling, less construction work, and a smaller area of sea occupied — all of which push the cost of each unit of electricity downward. The shift to 18-megawatt machines and the push into deep water are really one strategy: make far-offshore wind powerful and cheap enough to compete.
How Much Power It Actually Makes
The figures that matter most describe the electricity delivered and the fossil fuel replaced.
Once the Qingzhou project is fully running, China Three Gorges says it will send about 6 billion kilowatt-hours of clean electricity to the Greater Bay Area each year — the dense cluster of cities around Guangdong, Hong Kong, and Macao that includes Shenzhen and Guangzhou. That, the company estimates, is equivalent to cutting carbon-dioxide emissions by nearly 5 million tonnes a year compared with producing the same power from coal.
Put those numbers in context. The Greater Bay Area is one of the most electricity-hungry manufacturing and technology regions on Earth, home to a large share of China's electronics industry and a population running into the tens of millions. Supplying even part of that demand from distant offshore wind, rather than coal plants inland, is the practical reason these difficult projects are being built.
The Honest Caveats
No account is complete without the questions that decide whether this scales.
Only the first units are running. Five turbines are connected; the full 163-machine, 2-gigawatt project is not yet complete, and its annual output is a forecast based on expected wind, not a measured result. The 6-billion-kilowatt-hour and 5-million-tonne figures are planned estimates, and real output depends on wind speeds, storms, and how often the machines are available.
The ocean is a harsh long-term test. Typhoons, corrosion, biofouling, and powerful waves put constant stress on structures and cables. Surviving the first season and running reliably for twenty to thirty years are different achievements, and maintenance far out at sea is slow and expensive.
The transmission hardware is costly. High-voltage direct-current converter stations and long subsea cables are complex and expensive to build and repair. They make distant wind possible, but they also add large upfront costs that have to be recovered.
The figures come mainly from the developer. Capacity, output, and emissions-saving numbers are those reported by China Three Gorges and state media; they are credible as planning figures, but they are not an independent, audited record of actual performance.
What to Take Away
The Qingzhou project is a marker of where offshore wind is heading. As the easier shallow-water sites fill up, the next large reserves of wind energy lie far out in deep, rough water — where you cannot see the turbines from the beach. Reaching them requires more than a big machine. It requires a complete system: enormous 18-megawatt turbines, structures built to survive typhoons, and high-voltage direct-current transmission that can carry the power 70 kilometers home without wasting it.
China has now demonstrated all the main pieces at full scale. Whether they prove durable and affordable over decades of operation is still being tested, and the full project is yet to be completed. But the direction is clear. The offshore wind farm of the near future is not a line of towers near the shore. It is a distant power station standing in the open ocean, quietly feeding the factories and cities of the world's largest industrial region with electricity made only from wind.