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Smart Integration of Photovoltaics, Vehicle Charging, and Battery Storage in a Household
Linköping University, Department of Electrical Engineering, Vehicular Systems.
Technische Universität Munchen.
Technische Universität Munchen.
2018 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The installed power of photovoltaics (PV) in- creases rapidly, as well as electric vehicles (EV). Most of the EV charging will occur at home, and there is a possibility to shift the charging in time to minimize the electricity cost. The reasons are for example to maximize the self-consumption of the produced electricity, and to charge the EV when the electricity price is at the lowest rate, since the electricity price is set by hourly rates one day in advance in northern Europe. To maximize the self-consumption of the generated PV power, battery storage systems (BSS) are common in Germany, but not as common in Sweden. Simulations and optimizations show that installation of PV systems significantly cuts the electricity costs for the households. Optimizing the time when to charge the EV decreases the yearly electricity cost by about 5% in Sweden, which is a good contribution since the investment of such system is small. Installing a BSS saves only about 3%, and is therefore not profitable due to the high investment. In Germany the difference between selling and buying electricity is significant, and therefore the electricity bill savings are about 1500SEK/year (6%) by installing a 5kWh BSS. Considering the investment cost, this is not yet profitable, but only a relatively small change in the market conditions will make the BSS profitable in Germany.

Place, publisher, year, edition, pages
2018.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-160810OAI: oai:DiVA.org:liu-160810DiVA, id: diva2:1359421
Conference
2nd E-Mobility Power System Integration Symposium
Available from: 2019-10-09 Created: 2019-10-09 Last updated: 2019-10-09

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Citation style
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  • nn-NB
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Output format
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  • asciidoc
  • rtf