On the impact of single-phase plug-in electric vehicles charging and rooftop solar photovoltaic on distribution transformer aging

- Probabilistic impact of plug-in electric vehicle charging on transformer aging and neutral current has been quantified.
- The effect of rooftop solar photovoltaic penetrations has also been incorporated.
- Monte Carlo methods address plug-in electric vehicle charging and solar photovoltaic power generation uncertainties.
- Results reveal largest plug-in electric vehicle charging impact when vehicles charge based on time-of-use pricing methods.
- Results reveal solar photovoltaic generation reduces transformer aging without significant reduction in neutral current.

This study investigates the impact of single-phase plug-in electric vehicles charging on increasing the rate at which center-tapped distribution transformers experience aging. Distribution transformer aging is investigated considering varying rooftop solar photovoltaic generation penetration rates. Monte Carlo methods are used to probabilistically estimate the transformer's loss of life considering the effect of time-of-use (TOU) pricing. The results of applying the proposed method have revealed that plug-in battery electric vehicle charging impact on both transformer aging and neutral current is largest in the case that vehicles charge based on time-of-use pricing methods. Further application has shown that while rooftop solar photovoltaic generation reduces transformer aging, no significant reduction in neutral current is observed.