A probabilistic method for calculating the usefulness of a store with finite energy capacity for smoothing electricity generation from wind and solar power

D.G. Infield, John P Barton

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)


This paper describes a novel method of modelling an energy store used to match the power output from a wind turbine and a solar PV array to a varying electrical load. The model estimates the fraction of time that an energy store spends full or empty. It can also estimate the power curtailed when the store is full and the unsatisfied demand when the store is empty. The new modelling method has been validated against time–stepping methods and shows generally good agreement over a wide range of store power ratings, store efficiencies, wind turbine capacities and solar PV capacities.

Example results are presented for a system with 1 MW of wind power capacity, 2 MW of photovoltaic capacity, an energy store of 75% efficiency and a range of loads from 0 to 3 MW average.
Original languageEnglish
Pages (from-to)943-948
Number of pages5
JournalJournal of Power Sources
Issue number2
Early online date11 Aug 2005
Publication statusPublished - 22 Nov 2006


  • energy storage
  • stand-alone power systems
  • modelling
  • photovoltaics
  • voltage control
  • wind power generation

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