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Battery storage system for small community

This report discusses the integration of a battery storage system within a wind energy framework for a small community in Cleveland with 1,000 households. It highlights the design and performance of the battery system, which includes five 2MW wind turbines, addressing intermittency issues and energy demand during low production periods. The analysis covers the community's average load, the battery's nominal and usable capacities, and the overall system efficiency. Key benefits such as low emissions, maintenance needs, and grid configuration strategies are also outlined.

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Battery storage system for small community

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  1. Battery storage system for smallcommunity Seathor & Mateusz&Jure Akureyri, 18.6.2009

  2. Table of content • Site with description • Wind resources and utilization • Load modelling • Intermittency issues • Battery design • Conclusions

  3. Wind resources and utilization • System location: Cleveland • 5 wind turbines (each 2MW) connected to grid and battery bank • Average wind velocity 8,08 m/s ch Power curve

  4. Households hourly load modelling • Small community with 1000 households • Average hourly load per household 2,88 kW Average hourly electricity load for most critical month

  5. Problem • How to meet energy needs, when there is not enought energy from wind turbines?

  6. Problem Production kWh/yr % Wind turbines 59,509,440 98 Grid purchases 1,193,459 2

  7. Battery stack properties Strings in parallel 3,157 Battery stack performance

  8. Battery design • Nominal capacity 23,993 kWh • Usable nominal capacity 14,396 kWh • Autonomy 5.03 hr

  9. Battery

  10. Hourly battery state of charge

  11. Battery storage advantages • Grid parallel configuration • High system efficiency • Low maintenance • Low noise • Zero emission • Long lifetime <4500 cycles

  12. Conclusions • We were not modelling costs • In general, if connection to the grid is available, one does not use batteries. • We designed our batteries to cower basic load during summer time low production from wind turbines • Peak power was provided by the grid. • Excess power was sold to the grid as well

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