Methods for the verification of protective measures for safety of DC charging stations for electric vehicles Daniel HERBST, Robert SCHUERHUBER and Ernst SCHMAUTZER   2019/07/15

Abstract

Due to the rising number of electric vehicles in operation the handling of charging stations concerning testing and personal safety has been becoming more and more a focus of interest in practice. Currently there are still open questions concerning safe installation, inspection and operation of such charging stations. This paper focuses on protective measures for safety and initial as well as periodic testing of DC charging stations. At the beginning of the work an overview of legal regulations and technical standards for charging stations is compiled. Further on different DC charging processes (of charging stations from different manufacturers in normal operation and in cases of faults) are measured as well as analysed. It shows that DC charging stations of different manufacturers react differently with regard to switch-off behaviour or switch-off times to various fault scenarios.

Authors and affiliations

Daniel HERBST1, Robert SCHUERHUBER1 and Ernst SCHMAUTZER1
1. Institute of Electrical Power Systems. Graz University of Technology. Graz (Austria)

Key words

Electric vehicle, DC charging station, protection against electric shock, protective measures, initial and periodic verification

References

[1] European Alternative Fuels Observatory, “Infrastructure stats / Electric vehicle charging infrastructure”, http://www.eafo.eu/electric-vehicle-charging-infrastructure (accessed 2018-10-31).
[2] Bloomberg New Energy Finance, “Sustainable Energy in America – Factbook 2018”, https://data.bloomberglp.com/bnef/sites/14/2018/02/Sustainable-Energy-in-America-2018-Factbook.pdf (last downloaded 2018 10 31).
[3] D. Herbst, Master Thesis: „DC-Ladestationen für Elektrofahrzeuge - Ein Beitrag zur Entwicklung einer Prüfmethode und Prüfeinrichtung zur Erst- und wiederkehrenden Prüfung von DC-Ladestationen für Elektrofahrzeuge“, Graz University of Technology – Institute of Electrical Power Systems, Graz/Austria, Sep. 2018.
[4] IEC 61851-1:2017-02 “Electric vehicle conductive charging system – Part 1: General requirements”, IEC – International Electrotechnical Commission, Geneva/Switzerland, Feb. 2017.
[5] IEC/EN 61851 23:2014 “Electric vehicle conductive charging system – Part 23: DC electric vehicle charging station”, IEC – International Electrotechnical Commission, Geneva/Switzerland, Mar. 2014.