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Project P rogress R eport Hybrid System with ultracapacitor

Project P rogress R eport Hybrid System with ultracapacitor. 06117333 Chanwoo Kwon. Project Aim. Model the ultracapacitor. Build a DC/DC Converter to charge the ultracapacitor from a 12V battery. Model a load such as a motor in Matlab/Simulink. Structure of Hybrid energy system.

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Project P rogress R eport Hybrid System with ultracapacitor

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  1. Project Progress Report Hybrid System with ultracapacitor 06117333 Chanwoo Kwon

  2. Project Aim • Model the ultracapacitor. • Build a DC/DC Converter to charge the ultracapacitor from a 12V battery. • Model a load such as a motor in Matlab/Simulink.

  3. Structure of Hybrid energy system

  4. Information of PV panel • Model : HIP-210NKHB5 • Cell efficieny: 18.9% • Module efficiency:16.4%

  5. Maximum power point tracker • A maximum power point tracker (or MPPT) is a high efficiencyDC to DC converter that presents an optimal electrical load to a solar panel

  6. MPPT of HIP-210NKHB5

  7. 3 Types of Ultracapacitor • RC parallel branch model • RC transmission line model • RC series-parallel branch model

  8. RC parallel branch model • Each RC branch has a different time constant. • The fast-term branch dominates the charge and discharge behavior in the order of a few seconds. • The medium-term branch dominates the behavior over the scale of minutes. • Finally the slow-term branch governs the long-term charge and discharge characteristics.

  9. RC transmission line model • This model simulates the ultracapacitor’s physical structure and electromechanical characteristics directly.

  10. RC series-parallel branch model

  11. Why chose RC parallel branch model? • RC parallel branch model reflects the internal charge distribution process very well. • Good response of the ultracap’s dynamic behavior during charging and discharging. • Accuracy is better and not complex.

  12. Buck Converter

  13. Design buck converter in simulink

  14. equations • diL/dt=(Vs-Vo)/L s=1(switch on) - (1) • diL/dt=(-Vo)/L s=0(switch off) - (2) • From (1) and (2), diL/dt=(SVs-Vo)/Lo

  15. Values for simulation • Input voltage Vin=12V • Output voltage Vout=2.7*3=8.1V • Variation input voltage=+9¬15V • R=10 • L=0.3m • C=0.2m • Frequency=100khz -> T=1/100k=0.01 • D=Vout/Vin=8.1/12=0.675

  16. Use of simulink

  17. challenge • Decide a motor required high starting current and connect it with ultracapacitor model. • Decide each value such as inductor,capacitor,resistance to operate this motor efficiently. • Simulate a Simulink/MATLAB model of the complete system.

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