Evaluating PHEV impacts on domestic distribution grid in terms of power losses and voltage drop

Plug-in hybrid electric vehicles (PHEVs), as a new part of transportation sector, are growing fast during recent years. The batteries of PHEVs consume a huge amount of energy while charging. On the other side, PHEV owners would like to charge their PHEVs immediately after they come back home. At peak times, the electricity grid is facing a high demand of energy from customer and adding extra huge loads at these times to it whiteout any special plan and strategy, may lead to destroy the electricity grid. To avoid these kind of problems, PHEVs, as extra ancillary loads, should be connected to grid only through a coordinated plan. In this paper, the impact of these load from the aspect of power losses and voltage deviation have been analyzed and simulated in a real distribution grid of a district in Kermanshah city, Iran, in order to introduce a coordinated charging for PHEVs to minimize their negative effects on electricity grid. Since the precise forecasting of household load profile is not possible, quadratic programming, as a technique of stochastic programming is employed.