Evaluation of grid relieving measures for integrating electric vehicles in a suburban low-voltage grid
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Paper number
938
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Thormann, Bernd, Montanuniversitaet Leoben, Austria
Braunstein, René, Energienetze Steiermark GmbH, Austria
Wisiak, Johannes, Energienetze Steiermark GmbH, Austria
Strempfl, Franz, Energienetze Steiermark GmbH, Austria
Kienberger, Thomas, Montanuniversitaet Leoben, Austria
Braunstein, René, Energienetze Steiermark GmbH, Austria
Wisiak, Johannes, Energienetze Steiermark GmbH, Austria
Strempfl, Franz, Energienetze Steiermark GmbH, Austria
Kienberger, Thomas, Montanuniversitaet Leoben, Austria
Abstract
Within this study the impacts of future electric vehicle penetrations on the low-voltage level are analyzed. Therefore, the need for grid expansions is prematurely identified based on a suburban grid, operated by the Austrian distribution system operator Energienetze Steiermark GmbH. The future development of electromobility-induced grid effects is demonstrated by simulating several electric vehicle penetration rates. Additionally, grid restrictions are counteracted by analyzing grid- and user-controlled measures. The investigated suburban low-voltage grid could face inadmissible voltage range deviations per EN 50160 at an EV-penetration of only 10 %. Moreover, an increased share of electric vehicles leads to critical voltage unbalances (around 40 % EV) and thermal overloads (around 20 % EV). This study shows in addition, that voltage deviations are reduced significantly by several measures. Furthermore, grid expansions can be avoided by a charging infrastructure equipped with voltage-dependent active power control, or switching to three-phase charging with reduced power. These measures prevent inadmissible voltage range deviations and voltage unbalances as well as critical thermal conditions even at an 80 % electromobility penetration.
Table of content
Keywords
Publisher
AIM
Date
2019-06-03
Published in
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/205
http://dx.doi.org/10.34890/398
http://dx.doi.org/10.34890/398
ISSN
2032-9644
ISBN
978-2-9602415-0-1