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Project information

Grid integration of Compressed Air Energy Storage systems (CAES)

E. Lobato L. Rouco K. Dietrich L. Olmos A. Ramos J.M. Latorre I. Saboya I. Egido

October 2012 - July 2013

Funding entity Endesa


The integration of large amounts of wind and solar energy requires the use of energy storage systems. The energy storage systems with greater capacity traditionally used are based on reversible hydro (pump/turbine facilities). However, the best sites have already been exploited and the prospects of bringing new sites are limited.
Among the most promising alternatives for energy storage is the geological storage of high pressure air. This energy storage use compressive energy contained in a mass of pressurized air stored in geological cavities. Energy storage is done compressing air during valley hours. During peak hours, the compressed air is used to produce energy, expanding through Bryton cycle gas turbines with relatively high efficiency.
This project addresses a technical and economic study of grid integration of energy storage plants compressed air.


    Research topics:
  • *Steady-state: load flows, analysis of power system constraints, optimal load flows, voltage control ancilliary service,short-circuits, protections in transmission and ditribution networks
  • *Stability: large disturbance stability, tuning of frequency loadshedding schemes, excitation control, small disturbance stability, tuning of power system stabilizers, identification of AVR and governor models
  • *Long-term strategic analysis

EndesaPlantaCAES

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