Aging rate of low voltage transformer for a high penetration of Plug-in Hybrid Electric Vehicles (PHEVs)

In the coming years, the Plug-in Hybrid Electric Vehicles (PHEVs) will strongly penetrate in the French car fleet. This needs to estimate their impact on each element of the distribution electric grid. Based on house and transformer Daily Loads Profiles (DLPs) model's generator and probabilistic algorithms of PHEVs connections, this paper proposes the VTR_PHEV index to calculate the aging rate caused by the integration of PHEVs correlated with the load rate without PHEVs of MV/LV transformer. It is shown that aging rate of the transformer is quadratic in presence of PHEVs.