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MPPT DC/DC Converter Design for Photovoltaic Powered Electric Vehicle Charging System

MPPT DC/DC Converter Design for Photovoltaic Powered Electric Vehicle Charging System. Fearghal Kineavy 4 th Energy Systems Engineering – Electrical Stream Department of Electrical and Electronic Engineering, NUIG Supervisor: Dr Maeve Duffy Co-Supervisor: Dr Edward Jones. Aim of the Project.

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MPPT DC/DC Converter Design for Photovoltaic Powered Electric Vehicle Charging System

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  1. MPPT DC/DC Converter Design for Photovoltaic Powered Electric Vehicle Charging System Fearghal Kineavy 4th Energy Systems Engineering – Electrical Stream Department of Electrical and Electronic Engineering, NUIG Supervisor: Dr Maeve Duffy Co-Supervisor: Dr Edward Jones

  2. Aim of the Project MPPT DC/DC Converter DC Charging Unit OR Onboard AC/DC Rectifier and charger DC/AC Inverter to grid

  3. Nissan Leaf

  4. Nissan Leaf • Best selling electric car in Ireland in 2011 • 80kW AC Motor • Max speed of more than 140km/h • Max range approx. 175km • 24kWh Li-ion battery • 48 modules connected in series

  5. Nissan Leaf Charging • Home charge point (AC) • Single phase 16A (3.6kW) supply • 6-8 hours to charge • Public charge point (AC) • 3 phase supply • 2-3 hours to charge • Fast charge points (DC) • 400V DC, 120A (50kW) supply • 20-25 minutes charges EV to approx. 80% charge

  6. Nissan Leaf Charge Connections CHAdeMO Connector (DC current) Mennekes Type 2 Connector (AC current)

  7. PV Panels Required to charge Leaf

  8. PV Panels Required to charge Leaf

  9. Demonstration System

  10. Progress so far… • Extensive research done into: • Nissan leaf battery and other li-ion batteries • PV panels • DC/DC converters • Maximum Power Point Tracking (MPPT) • Begun designing small scale charging system to prove concept • PV panel, li-ion cell and charger chosen • Buck converter will be used, inductor and capacitor values to be chosen • MPPT will be implemented using PWM from an arduino to control the duty cycle (Perturb and Observe MPPT)

  11. Still to do • Test Spectra 10W PV panel to determine I-V and P-V curves • Choose suitable current sensor • Test charge li-ion cell with DC source to determine charging profile • Create SPICE simulation circuit to help choose appropriate values for the buck converter components

  12. Still to do • Design and do detailed simulation of full size system using SPICE • Scale up demonstration SPICE model • Will most likely have to change model to a boost converter for full size system • Alter component values accordingly • Analyse the system at various operating conditions (full load, half load etc.) • Compare full size DC charging system with alternative DC-AC-DC system (better efficiency?) • Compile results and write final report

  13. Questions?

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