Search for dissertations about: "power 2017"

Showing result 1 - 5 of 341 swedish dissertations containing the words power 2017.

  1. 1. Vulnerability and Power Social Justice Organizing in Rockaway, New York City, after Hurricane Sandy

    University dissertation from Uppsala : Uppsala University

    Author : Sara Bondesson; Uppsala universitet.; Försvarshögskolan.; [2017]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Statskunskap; Political Science; Social vulnerability; Disaster risk reduction; Social movements; Power; Empowerment; Hurricane Sandy; Rockaway; Statsvetenskap med inriktning mot krishantering och internationell samverkan; Statsvetenskap med inriktning mot krishantering och internationell samverkan; social vulnerability; disaster risk reduction; social movements; power; empowerment;

    Abstract : Det här är en studie om katastrofer, sårbarhet och makt. Avhandlingenspringer ur ett forskningsproblem: främjandet av marginaliserade gruppersegenmakt (empowerment) tros fungera bäst om den sker inifrån den egnagruppen och utifrån självorganiserande principer, men trots detta initierasoch styrs emancipatoriska projekt ofta av aktörer som inte själva tillhör marginaliseradegrupper. READ MORE

  2. 2. Where the Wind Blows the socio-political geography of wind power development in Finland, Norway and Sweden

    University dissertation from Umeå : Umeå universitet

    Author : Johanna Liljenfeldt; Umeå universitet.; [2017]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Social and Economic Geography; kulturgeografi; wind power; planning; land use; participation; power relations; energy justice; mixed methods; Finland; Norway; Sweden;

    Abstract : This thesis analysis the planning process for large-scale wind power development in Finland, Norway and Sweden. The aim is to explore the emerging power relations and socio-economic dynamics of the negotiation, planning and realization of this new development. READ MORE

  3. 3. On Reliability of SiC Power Devices in Power Electronics

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Diane-Perle Sadik; KTH.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Silicon Carbide; Metal-Oxide-Semiconductor Field-Effect Transistor MOSFET ; Junction Field-Effect Transistor JFET ; Bipolar Junction Transistor BJT ; Reliability; Failure Analysis; Reliability Testing; Short- Circuit Currents; Humidity; Resonant converter; Series-resonant converter SLR ; Base drive circuits; Gate drive circuits; Life-Cycle Cost Analysis LCCA ; Kiselkarbid; MOSFETar; JFETar; Bipolär Junction Transistor BJT ; Tillförlitlighet; Robusthet; Felanalys; Tillförlitlighetstestning; Kortslutningsströmmar; Luftfuktighet; Resonansomvandlare; Serie-resonansomvandlare SLR ; Basdrivkretsar; Gate-drivkretsar; Felskydd; Livscykelkostnadsanalys; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Silicon Carbide (SiC) is a wide-bandgap (WBG) semiconductor materialwhich has several advantages such as higher maximum electric field, lowerON-state resistance, higher switching speeds, and higher maximum allowablejunction operation temperature compared to Silicon (Si). In the 1.2 kV - 1. READ MORE

  4. 4. Magnetizing Currents in Power Transformers Measurements, Simulations, and Diagnostic Methods

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Claes Carrander; KTH.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Transformer core; diagnostics; three-phase; no-load; hysteresis; modeling; resonance; remanence; delta; Electrical Engineering; Elektro- och systemteknik;

    Abstract : This thesis demonstrates a method for transformer core diagnostics. The method uses the no-load current of the transformer as an indicator, and gives different characteristic signatures for different types of faults or defects. Using the no-load current for the diagnostic gives high sensitivity. READ MORE

  5. 5. Frequency response by wind farms in power systems with high wind power penetration

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Mattias Persson; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; inertia estimation; frequency control; power system stability; wind power integration; Power system; synthetic inertia;

    Abstract : The integration of variable speed wind turbines (VSWT) in power systems is increasing in order to reduce the emission of green house gases. This increase of power electronic converter interfaced generation causes a decrease of power system inertia, increasing the risk of load shedding and system frequency instability. READ MORE