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Home » Clean Technology » China Connects World’s Largest Flywheel Energy Storage Project to the Grid 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, the World’s Largest Flywheel Energy Storage Project, represents a significant step forward in sustainable energy. Its role in grid frequency regulation and support for renewable energy will help stabilize power systems as China continues to increase its reliance on wind and solar energy.
Abstract - This study gives a critical review of flywheel energy storage systems and their feasibility in various applications. Flywheel energy storage systems have gained increased popularity as a method of environmentally friendly energy storage.
The flywheel-based energy storage system works by converting electrical energy into kinetic energy, which is stored in a rotating flywheel housed in a vacuum. When energy is needed, the flywheel slows down, and the kinetic energy is converted back into electrical energy.
The power station will be built in phases, with the first phase of 25 megawatts capacity followed by the second phase of equal magnitude. The energy from this solar plant will be integrated into the Beninese national electricity grid, during the 25 years of the solar farm's expected lifespan.
The power station is located in the town of Pobè, in Plateau Department, in southeastern Benin, close to the international border with Nigeria. Pobè is located approximately 34 kilometres (21 mi), by road, north of Sakété, the capital of Plateau Department.
The solar farm is under development by the Government of Benin, with funding from the European Union (EU), the French Development Agency (AFD) and the Beninese Electricity Company (SBEE). The power station will be built in phases, with the first phase of 25 megawatts capacity followed by the second phase of equal magnitude.
The Beninese government selected the French engineering and construction conglomerate Eiffage to design, construct, operate, maintain the solar farm for the first three years of commercial operation, then transfer it to SBEE. Eiffage in turn, tasked two of its subsidiaries, Eiffage Énergie Systèmes and RMT to carry out the task.
A typical system consists of a flywheel supported by rolling-element bearing connected to a motor–generator. The flywheel and sometimes motor–generator may be enclosed in a vacuum chamber to reduce friction and energy loss. First-generation flywheel energy-storage systems use a large steel flywheel rotating on mechanical bearings.
Power utilities need innovative ways to store renewable wind and solar energy, during low demand periods, so they can release it after sunset when demand is high. Several innovative power utilities already use flywheel storage systems to maintain power grid frequency. Renewable energy is knocking on flywheel energy’s door.
Anything to do with energy storage attracts us, although a flywheel energy storage system is very different from a battery. Flywheels can store grid energy up to several tens of megawatts. If we had enough of them, we could use them to stabilize power grids.
Because a flywheel must be accelerated by an external force before it will store energy, it is considered a “dynamic” storage system. The rate at which the flywheel spins remains nearly constant because of the vacuum-like container, which prevents friction from slowing the revolution.
