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HydroFly: Flywheel

HydroFly: Flywheel. Gavin Abo Nate Stout Nathan Thomas. Background. The flywheel is a mechanical energy storage device Once up to speed very little energy is required to maintain desired speed Small draw on AMPS. Background Continued.

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HydroFly: Flywheel

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  1. HydroFly: Flywheel Gavin Abo Nate Stout Nathan Thomas

  2. Background The flywheel is a mechanical energy storage device Once up to speed very little energy is required to maintain desired speed Small draw on AMPS

  3. Background Continued • Flywheels were used during the industrial revolution to smooth out torque pulses in mechanical systems • We will use it in a similar fashion to smooth out voltage sags on the AMPS

  4. Voltage Sags • Drop in RMS voltage • Typically last from 1/2 cycle to a minute • Caused by actions on the system that have large current draws • Motors starting • Transformers energizing • Pulsed load switching • Electrical faults

  5. Why Sags Are Bad • Voltage sags have adverse affects on sensitive loads • Sags can cause loads to shutdown • Loss of use • Loss of Data • Loss of production time

  6. Navy • Survivability of Naval ships in battle situations • In battle situations voltage sags can occur due to various reasons, causing critical systems to go offline • Flywheel voltage sag detection devices could be used to help protect these critical systems

  7. Education • The flywheel energy storage system may be implemented into future power classes at the University of Idaho for educational purposes • Power quality classes • System protection classes • Transient analysis classes

  8. Main Objective • Implement the design by Satish Samineni • Be able to correct for up to 33% voltage sags on AMPS

  9. We will focus on • Induction motor controller • Programming of the DC link • Synchronizing to AMPS • Protection circuitry • We will not do: • Design of DC link • Design of Induction motor controller

  10. Block Diagram

  11. Switching

  12. PWM • A triangle wave reference is applied to a signal • Compared • Triangle high: logic 0 • Signal high: logic 1 • Applied to all 3 phases

  13. Block Diagram

  14. Series Transformer Diagram

  15. Synchronization & Protection • Use a phase lock loop to monitor and regulate phase • Add any additional protection needed

  16. In phase Out of phase

  17. Budget *Shared costs between the two groups

  18. Time Schedule

  19. Questions? www.ece.uidaho.edu/hydrofly

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