Flywheel energy storage system modeling and design

What is a flywheel energy storage system (fess)?

As a vital energy conversion equipment, the flywheel energy storage system (FESS) [, , , , ] could efficiently realize the mutual conversion between mechanical energy and electrical energy. It has the advantages of high conversion efficiency [6, 7], low negative environmental impact [8, 9], and high power density [10, 11].

What are the applications of Flywheel energy storage?

Flywheel energy storage has the advantages of fast response speed and high energy storage density, and long service life, etc, therefore it has broad application prospects for the power grid with high share of renewable energy generation, such as participating grid frequency regulation, smoothing renewable energy generation fluctuation, etc.

What are the potential applications of flywheel technology?

Other opportunities are new applications in energy harvest, hybrid energy systems, and flywheel’s secondary functionality apart from energy storage. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Is a flywheel energy storage system based on a permanent magnet synchronous motor?

In this paper, a grid-connected operation structure of flywheel energy storage system (FESS) based on permanent magnet synchronous motor (PMSM) is designed, and the mathematical model of the system is established.

How to determine RTE of a flywheel storage system?

Determination of RTE of a storage system requires multidiscipline system modeling and simulations. The modeling and simulation presented in this paper determines the RTE of the flywheel storage system. The losses in the converter, magnetic bearings, and the machine losses (copper and iron losses) are considered for calculation of RTE.

What makes a flywheel a power rated machine?

The M/G’s design, including the power density and current carrying capacity, is crucial for the flywheel’s power rating. Apart from electric machines, the other option is to use magnetic gears (MGR) to link the flywheel with the external load. As depicted in Fig. 6, magnetic gears do not require extra power electronics.