Recent developments in the design and applications of utility-scale energy storage plant

Innogy Limited announced the Regenesys (R) energy storage technology during the summer of 1999. This paper highlights the developments and milestones in the commercialisation of this technology. The technology is applicable to the integration of distributed resources including renewable generation and the use of energy storage as a supplement or alternative to distributed generation or other methods of local network reinforcement. The technology offers a novel solution to many technical and commercial constraints on a power network. It is based on flow batteries (also known as redox flow systems or regenerative fuel cells)