Open AccessAnatomy of electric vehicle fast charging: Peak shaving through a battery energy storage—A case study from Oslo
Author(s) -
Rautiainen Antti,
Rauma Kalle,
Rohde Lena,
Supponen Antti,
Raulf Fabian,
Rehtanz Christian,
Järventausta Pertti
Publication year - 2021
Publication title -
iet electrical systems in transportation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.588
H-Index - 26
eISSN - 2042-9746
pISSN - 2042-9738
DOI - 10.1049/els2.12005
Subject(s) - battery (electricity) , electric vehicle , automotive engineering , photovoltaic system , electrical engineering , peaking power plant , generator (circuit theory) , peak load , electricity , reduction (mathematics) , environmental science , engineering , power (physics) , physics , renewable energy , distributed generation , quantum mechanics , geometry , mathematics
The number of electric vehicle (EV) users is strongly increasing so that today roughly every second registered vehicle in Norway is an EV. To increase the EV utilization, politics, industry and the EV users strongly promote the integration of fast charging infrastructure. While the future demand of fast charging sites is a well‐studied topic, not much is known about the utilization of the existing charging sites and daily load curves. To fill this knowledge gap, usage data of a charging site in Oslo is analysed. Further on, the impact of a battery energy storage (BES) as well as a photovoltaic generator on peak load reduction is studied. The analysis shows variations and trends in the daily and weekly charging behaviour depending on the degree of utilization of the charging station. On average, a single EV user charges around 10 kWh in 19 min. Furthermore, the evidence indicates that EV users may have adapted fast charging as a part of their daily travels and it is not used only during long distance journeys. The results suggest that a BES can reduce the peak load by up to 55%. By adding a photovoltaic generator, a minor additional reduction of peak load is seen.