Stratosphere Airborne Wind Energy System Megawatt Wind Power from A Height of 1.2 Miles: Airship Feeds Ectricity into the Grid

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The idea of using turbines to generate energy at high altitudes and transmit it to earth is nothing new. However, a Chinese energy company recently took the concept to a new level with a helium-filled aerostat carrying twelve integrated wind turbines and generating electricity in the megawatt range for the first time.

Concepts for flying wind turbines have been tested for some time now. While smaller systems based on kites or wings are often tested in European projects, much larger platforms are used in China. The company Linyi Yunchuan from Beijing has been developing SAWES series aerostats together with Tsinghua University and the Chinese Academy of Sciences for several years.

The abbreviation stands for Stratosphere Airborne Wind Energy System. An aerostat is a lighter-than-air missile that floats in the air due to the buoyancy of a gas. In the case of Linyi Yunchuan, helium is used. The company's projects have already attracted attention in the past—including on the ELEKTRONIKPRAXIS website. The company has now announced another milestone for 2026.

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Energy from 1.2 Miles Above Sea Level

An airship-like system for generating electricity in the megawatt range has been tested for the first time: the S2000 platform. During a test flight in Sichuan province, the aerostat climbed to an altitude of around 1.2 miles in around 30 minutes. During the test, the system generated around 385 kWh of electrical energy, which was fed directly into the local power grid.

The wind turbine carried aloft by the aerostat uses winds that are usually stronger and more consistent at this height than at ground level. In principle, this allows higher energy yields to be achieved. The energy generated is transmitted to the ground station via a cable.

"It's like capturing the wind from all sides and restricting the airflow within this channel so that as much wind as possible is absorbed by the rotors. We have installed twelve wind turbines in this channel," explains Weng Hanke, Chief Technology Officer at Linyi Yunchuan, to Tide News (via Interesting Engineering).

The world's first MW-class S2000 Stratosphere Airborne Wind Energy System (SAWES) for urban use has successfully completed a test flight in Yibin, southwest China's Sichuan Province. During the test, the system ascended to an altitude of 1.2 miles, generating and feeding 385... pic.twitter.com/CFynQ6h0b8— People's Daily, China (@PDChina) January 13, 2026

The system is around 200 feet long and has twelve integrated turbines in an air duct structure. In its current design, it can achieve outputs in the megawatt range and will also be used in regions that are difficult to access or near urban areas in the future.

However, the concept still faces challenges, for example in terms of maintenance, safety of the long connecting cables or operation in airspace. Developers therefore see such systems primarily as a possible addition to traditional wind turbines. (sb)