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The Impact of Charging Plug-In Hybrid Electric Vehicles on a Residential Distribution Grid

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3 Author(s)
Clement-Nyns, K. ; Dept. of Electr. Eng., Katholieke Univ. Leuven, Leuven, Belgium ; Haesen, E. ; Driesen, J.

Alternative vehicles, such as plug-in hybrid electric vehicles, are becoming more popular. The batteries of these plug-in hybrid electric vehicles are to be charged at home from a standard outlet or on a corporate car park. These extra electrical loads have an impact on the distribution grid which is analyzed in terms of power losses and voltage deviations. Without coordination of the charging, the vehicles are charged instantaneously when they are plugged in or after a fixed start delay. This uncoordinated power consumption on a local scale can lead to grid problems. Therefore, coordinated charging is proposed to minimize the power losses and to maximize the main grid load factor. The optimal charging profile of the plug-in hybrid electric vehicles is computed by minimizing the power losses. As the exact forecasting of household loads is not possible, stochastic programming is introduced. Two main techniques are analyzed: quadratic and dynamic programming.

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Power Systems, IEEE Transactions on  (Volume:25 ,  Issue: 1 )