Sökning: "AC-systems"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet AC-systems.

  1. 1. Parameter Study of Arc Squeezing DC Breaker : The impact of the geometry on counter force, pressure, and arc voltage

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

    Författare :Johanna Olsson; [2022]
    Nyckelord :Arc squeezing; DC breaker; Polymer ablation; Pressure measurement; Ljusbågssläckning; DC brytare; Polymerablation; Tryckmätning;

    Sammanfattning : The sustainable future in our already electrified world includes solar power generation, battery storage, and electric vehicles all which requires DC systems. DC breakers play a key role in operation and protection within the DC system. LÄS MER

  3. 2. Möjligheter och utmaningar för demand response i byggnader : En utvärdering av effektbesparingar kontra påverkan på inomhusklimatet i kontorsbyggnader

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Lisbet Ersson; [2021]
    Nyckelord :demand response; DR; efterfrågeflexibilitet; lastförflyttning; kontorsbyggnad; byggnad;

    Sammanfattning : This thesis examines the possibilities and limitations of connectingoffice buildings to demand response (DR) programs, with emphasis on the effect it has on indoor climate. Heating, ventilation and airconditioning (AC) systems was used as sources to scale power, and thereby contribute with power to capacity markets related to the electrical grid. LÄS MER

  4. 3. Development of a Plug and Play Solution for Commercial Off-grid Solar Refrigeration : Presenting a Battery Supported System Providing the AC Power Required to run a Coolfinity 300L Commercial Refrigerator

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Martijn de Groot; [2021]
    Nyckelord :Solar refrigeration; Off grid refrigeration; Photovoltaic performance estimation; DC to AC conversion;

    Sammanfattning : In this report the design and testing of a plug and play system to run Coolfinity’s Icevolt 300 refrigerator on solar panels is discussed. Such a system will be able to provide adequate cooling for food & beverages in area’s with unreliable or no electricity available. LÄS MER

  5. 4. Control Strategies for VSC-HVDC links in Weak AC Systems

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för systemteknik

    Författare :Erik Björklund; [2019]
    Nyckelord :HVDC; VSC; voltage source converter; control theory; weak ac systems;

    Sammanfattning : In this master thesis control systems for a voltage-source converter HVDC connected to weak ac networks are investigated. HVDC stands for high voltage direct current and is a way to transfer power in the electrical power system. LÄS MER

  7. 5. Probabilistic Approach to InsulationCoordination

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Alexander Bilock; [2016]
    Nyckelord :VSC-HVDC; KDE; Insulation coordination;

    Sammanfattning : The present work was performed at HVDC ABB as an initial study on how to adopt probabilistic concepts into the VCSHVDC insulation coordination. Due to large voltage levels in HVDC applications the corresponding insulation need to be properly addressed to ensure a safe, economical and reliable operation. LÄS MER