Design and application of a power unit to use plug-in electric vehicles as an uninterruptible power supply

Due to the population growth and technology development, the energy demand of the world is increasing. Today, a big portion of this energy demand is supplied by utilization of fossil fuels. However, fossil fuel reserves are depleting and the utilization of these fuels provide negative environmental effects. Thus, the number of studies on decreasing the mentioned negative effects is increasing gradually. One of the main fossil fuel consumers is transportation systems. However, the increase of fossil fuel consumption due to the internal combustion engine based vehicular systems causes both environmental problems and depletion of fossil fuel reserves. Electric vehicles, especially plug-in vehicular systems are considered as a short term applicable solution to these problems.Nowadays, a great number of studies are realized on plug-in electric vehicles that are considered to provide zero emission. In these studies, it is declared that this vehicle technology will gradually become widespread in a near future. The sale of electric vehicles has even started in many countries including our country. As well known, an energy storage unit that provides the required power for vehicle is employed in electric vehicles. This energy storage unit should be re-charged in charge points. Also, another reason for this type of electric vehicle to be popular is that the vehicle can be connected to the grid with a plug. Nowadays, the interaction of plug-in electric vehicle with the grid is one way. This interaction is the charging process. However, electric vehicle can be operated bi-directional by modifying the design of vehicle?s power unit or units. In such an operation condition, electric vehicle can be run as an uninterruptible power supply and supply the energy demand of the consumption center.Due to the large amount of energy stored in batteries of the vehicle, electric vehicle can supply the need of the residential unit. However, the design of power unit that can be utilized for the residential unit connection of vehicular systems gains a significant importance for the realization of this operating condition.In this thesis, a power unit is prepared to use with plug-in electric vehicles. Also, the simulation and the experimental studies have been conducted for use of plug-in electric vehicles as the uninterruptible power supply in the time of need.