Sökning: "Electrical"

Visar resultat 1 - 5 av 1638 uppsatser innehållade ordet Electrical.

  1. 1. Microgrid Safety and Protection Strategies

    Master-uppsats, KTH/Elektroteknisk teori och konstruktion

    Författare :Aryudha Hartono; [2018]
    Nyckelord :IB-RES; grid-connected mode; islanded mode; short circuit; IED; directional zero and negative sequence current protection; unbalanced load flow; protection coordination; fault ride-through;

    Sammanfattning : One of the challenging issues with the Microgrid is that the bidirectional power flow providedby the distributed generator (DG) which modify the fault current level. Furthermore, theinverter based-renewable energy source (IB-RES) limits the total fault current contributionto the grid due to its thermal capability. LÄS MER

  2. 2. Diffusion MRI of Brain Tissue: Importance of Axonal Trajectory

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Kärnfysik

    Författare :Jan Brabec; [2018]
    Nyckelord :dMRI; diffusion magnetic resonance; axonal trajectory; axonal geometry; undulations; modeling; axons; inverse problem; diffusion spectrum; time-dependent diffusion; Physics and Astronomy;

    Sammanfattning : Obtaining microstructural information non-invasively on brain tissue remains a challenge. Diffusion magnetic resonance imaging (dMRI) is an imaging method that can provide such information. That includes geometrical considerations of nerve cells projections, axons, that are present in the white matter of the human brain. LÄS MER

  3. 3. Miljökrav på solceller : En utredning om koldioxidutsläpp från kristallina kiselsolceller

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Kristin Vanky; [2018]
    Nyckelord :;

    Sammanfattning : This master thesis is an investigation of environmental sustainability of photovoltaic (PV) modules. The purpose is to examine how purchasers of PV systems could put requirements on the modules so that their life-cycle carbon dioxide emissions reduces in the most effective way. LÄS MER

  4. 4. Integrated generator for use in aircraft engines

    Master-uppsats, Lunds universitet/Institutionen för Energivetenskaper

    Författare :Fredrik Andersson; [2018]
    Nyckelord :Integrated generator; aircraft engine; generator; aircraft generator; Technology and Engineering;

    Sammanfattning : In this paper the use of integrated generators for airplane engines is examined. In order to accomplish this goal a combination of MatLab with FEMM and ANSYS Maxwell is used to make incrementally more and more detailed analysis of the integrated generator concept. LÄS MER

  5. 5. Påverkan på spänningskvalité av enfasiga solcellsanläggningar i Gävle Energis lågspänningsnät

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Elektricitetslära

    Författare :Josefine Henriks; [2018]
    Nyckelord :;

    Sammanfattning : In recent years, the number of photovoltaic systems (PV systems) has increased in Sweden. According to the Swedish Energy Agency the number is expected to continue to increase in the future, much thanks to the declining prices of PV systems. LÄS MER

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