Control of EV charging to reduce peak powers in domestic real estate

Abstract

The paper discusses electric vehicle (EV) charging control in apartment buildings in cases of high EV penetration. The introduced control method for EV charging utilizes real-time measurements and memorized peak power consumptions to determine a suitable charging power. The aim of the control method is to avoid an unnecessary increase to the peak powers of the whole property, while still allowing EVs to be charged sufficiently. This kind of control method could lead to cost savings if the power-based distribution tariff of distribution system operators (DSO) included a price component based on monthly peak power. Some Finnish DSOs have launched this kind of power-based distribution tariff for small-scale customers also. Simulations indicate that PHEVs can likely be sufficiently charged without increasing the monthly peak powers or controlling other loads of the property when EV penetration is around 40% or less.