Portuguese LV expected investment needs until 2020 associated with the electrical vehicle and microgeneration integration

The number of electric vehicles (EV) and microgeneration (μG) units connected to LV grids are expected to increase significantly during the present decade. Both EV and μG units have an impact on the operational conditions of LV grids - namely concerning power flows and voltage profile - that, in some cases, will force the DNO (Distribution Network Operator) to reinforce or expand those grids in order to guarantee an adequate quality of service to the end users. This paper presents a probabilistic methodology that enables the DNO to estimate LV reinforcement necessities up to 2020 due both to EV´s and μG units.