Technical Evolution of Advanced Flywheel Energy Storage System

The flywheel energy storage system (FESS) is a new type of technology of energy storage, which has high value of the research and vast potential for future development. The FESS has distinct advantages such as high energy storage, high efficiency, pollution-free, wide in application, absence of noise, long lifetime, easy maintenance and continuous working and so on, which provides a new way to solve the terrible energy problem. Its operation principle, and five key technologies including the flywheel rotor, bearing system, energy conversion aspect, motor/generator and vacuum chamber are expounded. Then, the technical evolution of FESS at home and abroad is presented in detail, the application prospect of FESS is also given, and moreover, the research outlook of FESS is pointed out.