Charge optimization of privately and commercially used electric vehicles and its influence on operational emissions

Presentation and Paper at the 41th IAEE International Conference in Groningen, Netherlands

Operational emissions of electric vehicles heavily depend on the charging times of the vehicles and the underlying electricity mix. With an increasing share of fluctuating renewable energies, this correlation is becoming increasingly apparent and charge controls are becoming increasingly important. In the paper presented, a method was developed which allows to derive coherent and time-resolved driving profiles of private and business traffic in Germany from the traffic surveys "Mobility in Deutschland 2008" and "Kraftfahrzeugverkehr in Deutschland 2010". On the basis of these driving profiles, various charge control strategies and their effects on operational emissions per km were investigated. The results for the year 2030 are summarized in the following figure.


comparison of operational emissions of electric vehicles

Figure: Comparison of operational emissions of electric vehicles used in private and commercial traffic based on different charging strategies in 2030


Overall, both the Day-Ahead price and emission-optimized charging lead to a significant reduction in specific emissions. Furthermore, with an increasing share of renewable energies (2015 vs. 2030), the efficiency of both Day-Ahead-optimized and emission-optimized charge control increases in all cases under consideration. In both the considered years’ only small differences between the efficiency of a charge-optimization for the privately and commercially used cars can be made out. Both optimization modes for commercially used trucks on the other hand seem to have a greater effect. The exploration of this coherence is subject of currently ongoing further research in the project Dynamis.



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