The 30 MW plant is the first utility-scale, grid-connected flywheel energy storage project in China and the largest one in the world. Contact online >>
The 30 MW plant is the first utility-scale, grid-connected flywheel energy storage project in China and the largest one in the world.
Main components of a typical flywheel
Image: Pjrensburg, Wikimedia Commons
China has connected to the grid its first large-scale standalone flywheel energy storage project in Shanxi Province''s city of Changzhi.
The Dinglun Flywheel Energy Storage Power Station broke ground in July last year. China Energy Construction Shanxi Power Engineering Institute and Shanxi Electric Power Construction Company carried out the construction works. BC New Energy was the technology provider and Shenzhen Energy Group was the main investor.
The project represents a pioneering use of a semi-buried underground well system designed to provide a safe environment for the operation, waterproofing, cooling, and maintenance of the flywheel unit.
Flywheel energy storage technology is a form of mechanical energy storage that works by accelerating a rotor (flywheel) to a very high speed and maintaining the energy in the system as kinetic energy. Compared to other mechanical energy storage technologies such as pumped hydro and compressed air, flywheel storage has higher energy and power density, higher efficiency, and rapid response.
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With a power output of 30 megawatts, China’s Dinglun flywheel energy storage facility is now the biggest power station of its kind.
The US has some impressive flywheel energy storage plants. The largest of these is the 20 MW Beacon Power flywheel station located in Stephentown, New York. Until recently, it was the world''s largest flywheel energy storage system (FESS), but not anymore.
China has developed a massive 30-megawatt (MW) FESS in Shanxi province called the Dinglun flywheel energy storage power station.
This station is now connected to the grid, making it the largest operational flywheel energy storage facility ever built.
According to the China Energy Storage Alliance (CNESA), the station will play a big role in stabilizing the local power grid and supporting renewable energy integration in China.
When electricity is needed, the flywheel’s rotational speed is reduced, and the stored kinetic energy is converted back into electrical power using a generator. This type of storage is useful as it can quickly store and release energy, making it ideal for balancing the supply and demand of electricity on the grid.
It offers more efficiency and higher power density compared to compressed air, pumped hydro, and various other mechanical energy storage systems.
Plus, compared to other popular energy storage solutions such as Li-ion batteries and supercapacitors, they have longer life spans (~ 20 to 30 years) and have less environmental impact.
This is because they don''t use any chemicals or toxic heavy metals. "FESS are also good candidates for electrical grid regulation to improve distribution efficiency and smoothing power output from renewable energy sources like wind or solar farms," a study notes.
The construction of the Dinglun station began in 2023. The total cost of the project came out to be a whopping $48 million.
This happens to be China''s first large-scale FESS, and it can store enough energy to power over 2,000 households for an entire year.
The makers of the Dinglun station have employed 120 advanced high-speed magnetic levitation flywheel units. This makes the facility more stable and will allow it to store energy efficiently in a vacuum and under low-friction conditions.
A special feature of the station is its semi-buried underground well system which provides a safe environment for workers to monitor its operations and perform maintenance tasks.
Boasting an output of 30 MW, the station comprises an array of 12 energy storage units that were recently connected to a 110-kilovolt (kV) power grid.
Hopefully, this powerful energy storage facility will inspire the development of many similar stations that promise energy with a reduced environmental impact.
China has connected its first large-scale, grid-connected flywheel energy storage system to the power grid in Changzhi, Shanxi Province. The Dinglun Flywheel Energy Storage Power Station, with a capacity of 30 MW, is now the world''s largest flywheel energy storage project which is operational, surpassing previous records set by similar projects in the United States.
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