Sökning: "Current Limiter"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden Current Limiter.

  1. 1. Maximum Inverter AC Current Prediction Based on Junction Temperature Calculation

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Shuyu Ou; [2019]
    Nyckelord :IGBT; Inverter; Junction temperature; Current Limiter; IGBT; Växelriktare; Övergångstemperatur; Strömbegränsare;

    Sammanfattning : Semiconductor devices are widely used in the automotive industry, and they are key components of the inverter and the converter in an electric vehicle. Thus, the concern of protecting the inverter and the converter from damaging operation has been raised. The junction temperature is one of the main considerations. LÄS MER

  3. 2. Grounding of distrubution grids : High impedancegrounding compared to solid grounding with Fault Current Limiter

    Uppsats för yrkesexamina på avancerad nivå,

    Författare :Maria Kättström; [2017]
    Nyckelord :;

    Sammanfattning : Today cables replace overhead lines in distribution systems and cause higher system capacitance and higher capacative fault currents. This fault current, in the fault location, is limited by a Petersén coil and a resistance in parallel when a fault occurs in so called “high impedance grounded systems” which are commonly used in Europe. LÄS MER

  4. 3. Strömbegränsare i synkrongeneratorer : En studie av strömbegränsarmodeller i PSS/E

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Axel Thornström; [2016]
    Nyckelord :Power systems; overexcitation limiter; stator current limiter; dynamic simulation; PSS E; automatic voltage regulator; Kraftsystem; fältströmbegränsare; statorströmbegränsare; strömbegränsare; PSS E; spänningsreglering; dynamisk simulering;

    Sammanfattning : It is well known that a crucial factor determining the transmission capacity with regards to the voltage stability limit of a stressed power system, is the limitation of field and stator current of overexcited generators. These limiters are commonly referred to as overexcitation limiters (OEL) and stator current limiters (SCL). LÄS MER

  5. 4. Design and Test of an L-Band (GNSS) Low Noise Amplifier and Limiter

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Ms Navneeta; [2015]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Abstract This thesis work was performed at RUAG Space AB, Göteborg, Sweden. The aim of this thesis is to test the performance boundaries of SiGe based heterojunction bipolar transistor in designing a low noise amplifier meant for GNSS applications. LÄS MER

  7. 5. Optimized Tuning of Parameters for HVDC Dynamic Performance Studies

    Uppsats för yrkesexamina på avancerad nivå, Institutionen för informationsteknologi

    Författare :Axel Andersson; [2013]
    Nyckelord :optimization;

    Sammanfattning : HVDC (High Voltage Direct Current) is used all over the world for transmission of electric power due to lower losses compared to traditional HVAC (High Voltage Alternating Current). However, the procedure of converting AC into DC puts great demand on the control system of the converter stations. LÄS MER