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Integration of electric vehicles to the distribution grid

Integration of electric vehicles to the distribution grid. Nina Wahl Gunderson and Kjell Sand SINTEF Energy Research Norway. Introduction. Strong Norwegian incentives promoting electric vehicles (EVs) EV load may cause power quality (PQ) problems Study on car pool in downtown Trondheim

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Integration of electric vehicles to the distribution grid

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  1. Integration of electric vehicles to the distribution grid Nina Wahl Gunderson and Kjell Sand SINTEF Energy Research Norway

  2. Introduction • Strong Norwegian incentives promoting electric vehicles (EVs) • EV load may cause power quality (PQ) problems • Study on car pool in downtown Trondheim • Energy, power and PQ measurements • Load characteristics Nina Wahl Gunderson – Norway – Session 5 – 0785

  3. Measurement instruments • Power Detective energy meter • Elspec G4500 Blackbox advanced PQ recorder Nina Wahl Gunderson – Norway – Session 5 – 0785

  4. Charging pattern single vehicle Nina Wahl Gunderson – Norway – Session 5 – 0785

  5. Total load 11 charging stations Coincidence factor = Nina Wahl Gunderson – Norway – Session 5 – 0785

  6. Utilization time single vehicle Nina Wahl Gunderson – Norway – Session 5 – 0785

  7. PQ measurements: voltage THD Nina Wahl Gunderson – Norway – Session 5 – 0785

  8. PQ measurements: Voltage unbalance Nina Wahl Gunderson – Norway – Session 5 – 0785

  9. Conclusions • Afternoon power peak • No values close to PQ code limits • Low voltage THD values • Some voltage unbalance • EVs may cause problems in weak grids • Fast chargers require further studies Nina Wahl Gunderson – Norway – Session 5 – 0785

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