Using intelligent storage to smooth wind energy generation

Peter Coppin, Lan Lam, Andreas Ernst

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When highly convective or stormy weather conditions are widespread, fluctuating wind speeds can produce substantial variations in wind energy generation with periods of 1 to 2 hrs or less. These conditions can lead to significant problems on the grid, significantly reducing the carrying capacity of power lines or forcing the curtailment of wind generation. CSIRO is developing a smart energy storage system to reduce wind generation fluctuations by the application of fast response storage. This smoothing approach requires less expensive storage than conventional approaches which attempt to absorb total generation. Smoother output reduces the need for ancillary power services and can avoid the de-rating of power lines or even defer power infrastructure upgrades. CSIRO Ultrabattery technology is used in the system, which combines the benefits of low cost lead acid battery energy storage together with an internal ultra-capacitor enabling faster charge/discharge and longer life (Figure 2). The Ultrabattery, which was originally developed for hybrid car use, is being used here at a much larger scale. The Ultrabattery has been combined with predictive smoothing algorithms which utilise wind forecasting techniques, reducing the amount of storage required for a given effect. A grid-connected demonstration with a full-scale wind turbine system is being installed (360kW/200kWhr) on a 660kW wind turbine in 2009. Support is from the Australian Government Advanced Electricity Storage Technology fund together with Ecoult (see Demonstrations at MW-scale are being planned.

Original languageEnglish
Title of host publicationEuropean Wind Energy Conference and Exhibition 2009, EWEC 2009
Number of pages8
Publication statusPublished - 2009
Externally publishedYes
EventEuropean Wind Energy Conference and Exhibition 2009, EWEC 2009 - Marseille, France
Duration: 16 Mar 200919 Mar 2009


ConferenceEuropean Wind Energy Conference and Exhibition 2009, EWEC 2009

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