Technologies for energy storage. Flywheels and super conducting magnetic energy storage

Abstract

Flywheels~~m. a~, A flywheel is an electromechanical storage system in which energy is stored in the kinetic energy of a rotating mass. Flywheel systems under development include those with steel flywheel rotors and resin/glass or resin/carbon-fiber composite rotors. The mechanics of energy storage in a flywheel system are common to both steel-and composite-rotor flywheels. In both systems, the momentum of the rotating rotor stores energy. The rotor contains a motor/generator that converts energy between electrical and mechanical forms. In both types of systems, the rotor operates in a vacuum and spins on bearings to reduce friction and increase efficiency. Steel-rotor systems rely mostly on the mass of the rotor to store energy while composite flywheels rely mostly on speed.

The PHEV Charging Scheduling and Power Supply Optimization for Charging Stations

“…In addition, we assume that the public utility can utilize the energy storage devices such as batteries with large volume, flywheels [24], and supercapacitors [25] to store the power when the price is cheap and to release the power when the price is high or the power demand is large.…”

Energy storage systems for advanced power applications

“…The use of magnetic bearings helps improve the problems with bearing losses. Several projects are developing superconducting magnetic bearings for high-velocity flywheels [26]- [28]. The near elimination of rotational losses will provide flywheels with high charge/discharge efficiency.…”

Research on the Control Strategy of the Battery Energy Storage System in Wind-Solar-Battery Hybrid Generation Station

“…The energy storage technology is used to smooth the fluctuations of the wind or solar power (Boyles, et al, 2000, Kobayashi, et al, 2003. Meanwhile, the predictability of wind and solar generation should also be improved.…”