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Optimal Charge Scheduling of Plug-in Hybrid Electric Vehicles to Improve Distribution System Operatoion

Shafiee, Soroush | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43604 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Fotuhi-Firuzabad, Mahmood
  7. Abstract:
  8. Despite the economic and environmental advantages of plug-in hybrid electric vehicles (PHEVs), the increased utilization of PHEVs brings up new concerns for power distribution system operators and planners. Impacts of PHEVs on distribution network, although has been proven to be noticeable, has not been completely investigated for future years. Thus, it is necessary to study precisely PHEV impacts on residential distribution systems and then try to find a method to control PHEV charging in order to improve distribution system.In this thesis, a comprehensive model is proposed to study PHEV impacts on residential distribution systems for short and long-term simulations. To do this, at first PHEV characteristics such as 1) PHEV battery capacity 2) PHEV state of charge (SOC), and 3) PHEV energy consumption in daily trips, are accurately determined. Since some of PHEV characteristics depend on vehicle owner’s behavior, their behavior and interests are studied. Also, other requirements such as 1) the number of vehicle in a residential distribution network, 2) PHEV penetration level for upcoming years, and 3) distribution of PHEV in the network based on the characteristics, are extracted from related reports. Load growth along with different penetration levels of PHEV in different years is also considered to more accurately investigate the PHEV impacts. After that, a method for smart control of PHEV charging is proposed. To reach this aim, it is assumed that the houses are equipped with advanced measurement infrastructure and a controller for charging PHEVs of the house is improvised. The controller, charge the PHEVs considering electricity tariff and customer’s welfare. The objective function is to minimize cost of PHEV charging and also, minimizing waiting time for the house. The results show that without controlling of PHEV charging, the system peak load increases significantly. System losses and voltage deviation increases as well. With PHEV charge controlling using proposed method, majority of PHEVs charge at off peak period which is the best time for charging. Also, the system peak load decreases in comparison with the case of no controlling. This enhances system security and reliability and decreases system expenses.
  9. Keywords:
  10. Demand Response ; Electric Motor Vehicles ; Smart Power Grid ; Integrated Plug-in Hybrid Electric Vehicle (PHEV)Battery Chargers ; Plug-in Hybrid Electric Vehicle (PHEV)Charging Control

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