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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.
Flywheel Energy Storage Systems (FESS) rely on a mechanical working principle: An electric motor is used to spin a rotor of high inertia up to 20,000-50,000 rpm. Electrical energy is thus converted to kinetic energy for storage. For discharging, the motor acts as a generator, braking the rotor to produce electricity.
The use of new materials and compact designs will increase the specific energy and energy density to make flywheels more competitive to batteries. Other opportunities are new applications in energy harvest, hybrid energy systems, and flywheel’s secondary functionality apart from energy storage.
While many papers compare different ESS technologies, only a few research , studies design and control flywheel-based hybrid energy storage systems. Recently, Zhang et al. present a hybrid energy storage system based on compressed air energy storage and FESS.
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.
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.
Hybrid systems combining solar and wind power can provide a safer and more efficient alternative to traditional energy sources by combining the benefits of solar and wind power generation. Solar power generation peaks during the day, while wind power generation usually peaks at night or during inclement weather.
Thus, the goal of this report is to promote understanding of the technologies involved in wind-storage hybrid systems and to determine the optimal strategies for integrating these technologies into a distributed system that provides primary energy as well as grid support services.
Co-locating energy storage with a wind power plant allows the uncertain, time-varying electric power output from wind turbines to be smoothed out, enabling reliable, dispatchable energy for local loads to the local microgrid or the larger grid.
In order to address the issue of fluctuations caused by the large-scale integration of wind and solar energy into the grid, this study proposes a multi-energy complementary system of wind-solar-hydrogen hybrid by combining wind-solar hybrid power generation, electrolytic water hydrogen production, and fuel cell system.
