Mitigating the Impacts of EVs Charging Infrastructure on Dutch Residential Grids

With the enforcement of governmental regulations and incentives, the share of electric vehicles (EVs) in the mobility sector is on the rise, impacting significantly the grid and its operation. This paper aims to investigate and find solutions to mitigate the impacts of EV charging on Dutch residential grids, namely the impacts of voltage magnitude regulation and distribution transformer loading. This paper proposes a decentralized coordinated charging strategy with local voltage control at its essence. The proposed charging strategy effectively allocates the charging power by prioritizing users based on their current State-of-Charge (SOC) and/or Time of Departure (ToD), or the current loading on the distribution transformer. These parameters are communicated to the charge controller through an Internet-of-Things (IoT) platform. The proposed charging strategy was simulated on a real Dutch residential grid that serves 86 household users, assuming every household has its own controllable EV charger. Based on the obtained results, the proposed charging strategy has eliminated all voltage magnitude violations, reduced the loading on the distribution transformer, while also achieving a SOC that is 2.5% less than that of the uncontrolled charging strategy.