Monte Carlo simulation on the demand impact by quick chargers for electric vehicles

This paper presents a scheme of predicting the impact on the electric demand which may appear as random harmonics with respect to quick charging for widespread electric vehicles (EV). It is known that the battery charging for EV provides a potential problem to power distribution systems. The aims of this work are: (1) to make clear the influence of quick charging on power distribution system, and (2) to assess the optimal penetration level for load leveling to avoid a serious impact of harmonics. Ordinary quick charging will take place at lunch time according to the drivers psychology. This profile can be expressed by the normal probabilistic distribution function. If the penetration level of EV is accelerated, the profiles will appear randomly on the electric demand. Hence we can derive these impacts on power demand by the well-known Monte Carlo simulation. The proposed approach has been verified on a practical ten-machines and 47-buses test system.