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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Impact of electric vehicle charging on thedistribution grid in Uppsala 2030 / Påverkan av laddning av elfordon på distributionsnätet i Uppsala 2030

GUSTAFSSON, EMIL, NORDSTRÖM, FREDRIK January 2017 (has links)
Planning of distribution grids is based on statistically estimating the maximum load that will occur given a certain range of criteria (location, household types, district / electric heating etc.) Charging of electric vehicles is not one of these criteria. However, given the expected `boom' in sales of Chargeable Electric Vehicles (CEVs), and the lengthy planning process of distribution grids (>10 years) the knowledge gap is becoming a more pressing issue. This research has been conducted to investigate if Vattenfall, a Swedish electric utility company with distribution assets in both Sweden and Germany, needs to take action to react to the expected increase in CEVs in the near term. The study has been conducted with Uppsala Municipality as a showcase and 2030 as the time frame. The findings of this study show that Vattenfall should incorporate CEV usage into distribution planning to avoid overload of power stations in Uppsala by 2030. The ndings shows that 1) we can expect a 'boom' in sales of CEVs in the near future and that 73% of cars in trac in Uppsala may be CEVs by 2030 and 2) that CEV charging is expected to have a signi- cant impact on the distribution grid, with certain power stations in Uppsala seeing a peak load increase of up to 30%. The recommended actions are the following: • Monitor specific areas with a high concentration of cars and low energy consumption per household that already have substations with capacity below the recommended dimensions • Monitor CEV sales to reevaluate current projections on CEV development in Uppsala • Monitor trends of car ownership and evaluate whether this will aect CEV charging behaviour • Reconstruct Velander constants, used for grid planning, to take the CEV load into consideration • Investigate smart charging solutions, to shift the CEV load peak to a different time of the day / Dimensionering av distributionsnat baseras pa att statistiskt uppskatta den maximala lasten som kommer att intraa pa natet, givet olika faktorer (geograskt lage, hushallstyp, fjarrvarme / elvarme etc.). Laddning av elbilar ar inte en av de faktorer som man tar hansyn till. Givet en vantat kraftig okning av laddningsbara bilar, samt den langa planeringshorisonten for distributionsn at (>10 ar), blir dock fragan hur elbilar kommer att paverka elnatet valdigt aktuell. Denna studie har bedrivits for att avgora hur Vattenfall, ett statligt, svenskt elbolag med distributionsnat i Sverige och Tyskland, behover agera for att anpassa sig till den forvantade okningen av elbilar. Den har studien har genomforts som en fallstudie pa Uppsala Kommun med ar 2030 som tidsram. Resultaten fran studien visar att Vattenfall bor ta hansyn till laddning av elbilar vid dimensionering av distributionsnat for att undvika overbelastning pa natstationer i Uppsala ar 2030. Resultaten visar dels att 1) man kan forvanta sig en kraftig okning av forsaljning av laddningsbara fordon inom en snar framtid och uppemot 73 % av alla bilar i trak i Uppsala kommer att vara laddningsbaraar 2030 samt att 2) laddningsbara fordon kommer att ha en signikant paverkan pa distributionsnatet med okningar pa upp till 30 % av maxlasten for vissa natstationer. Foljande atgarder rekommenderas saledes: • Overvaka specika omraden med hog biltathet och lag energianvandning per hushall som ar anslutna till natstationer som ar underdimensionerade • Folj utvecklingen av forsaljning av laddbara fordon for att omvardera genom forda projektioner over laddningsbara bilar i Uppsala • Overvaka trender inom bilagande och utvardera hur detta paverkar laddningsbeteende • Gor om Velanderkonstanter sa att de tar hansyn till lasten fran laddbara fordon vid planering av elnat •  Utvardera smarta laddningslosningar for att ytta last fran elbilsladdning till en annan tidpunkt pa dygnet

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