Sökning: "Modular multilevel converter MMC"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden Modular multilevel converter MMC.

  1. 1. Closed-loop control and data- recording of a modular-multilevel converter (MMC)

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

    Författare :Longgang Su; [2022]
    Nyckelord :Modular multilevel converters MMCs ; filed programmable gate array FPGA ; direct memory access DMA ; energy closed-loop control; data recording; ethernet.; Modulära multilevel-omvandlare MMC ; filed programmeable gate array FPGA ; direkt minnesåtkomst DMA ; energistyrning med sluten slinga; datainspelning; ethernet.;

    Sammanfattning : Modular multilevel converters (MMCs) are the preferred converter solution in flexible ac transmission systems (FACTS) and high-voltage direct current (HVDC) applications. This is due to the high quality of the voltage and current signals, lower overall losses, and fewer problems with switching-related EMI. LÄS MER

  3. 2. Battery Balancing on a Full-Bridge Modular Multi-Level Converter

    Master-uppsats, Linköpings universitet/Fordonssystem

    Författare :Junyu Lin; [2022]
    Nyckelord :MMC; BMS; Modular Multilevel Converter; SOC; state of charge;

    Sammanfattning : Batteries are becoming popular in the trend of electrification. Performance andlifespan of a battery pack are closely related to how it has been utilized. Withproper balancing control to slow down aging process, variances of capacity andresistance between battery cells can be maintained at a better level. LÄS MER

  4. 3. Comparative Analysis of Several Designs of Modular Multilevel Converters with Interleaved Half-Bridge Submodules

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

    Författare :Lingyu Chen; [2022]
    Nyckelord :Modular multilevel converters MMC ; interleaved half-bridge submodule; interleaved converters; power loss calculation; converter efficiency; converter dimensions; Modulära multilevel-omvandlaren; interfolierad halvbrygga submodul; interfolierade omvandlare; effektförlustberäkning; omvandlareffektivitet; omvandlardimensioner;

    Sammanfattning : The Modular Multilevel Converter (MMC) is one of the most commonly used active converters in the high-/medium-voltage sector due to its many advantages such as high scalability, high efficiency, modularity and low harmonic contents. However, in low-voltage and high-current applications, classical MMC designs are not very economical. LÄS MER

  5. 4. Evaluation of DC Fault Current in Grid Connected Converters in HVDC Stations

    Master-uppsats, Uppsala universitet/Institutionen för elektroteknik

    Författare :Soham SinhaRoy; [2022]
    Nyckelord :Symmetrical monopole; HVDC LCC and VSC; CTL; MMC; Converter reactor; DC smoothing reactor; DC pole-to-pole fault; Peak factor; SCC; SCR; PSCAD EMTDC;

    Sammanfattning : The main circuit equipment in an HVDC station must be rated for continuous operation as well as for stresses during ground faults and other short circuits. The component impedances are thus selected for proper operation during both continuous operation and short circuit events. LÄS MER

  7. 5. Transmission Systems for Grid Connection of Offshore Wind Farms : HVAC vs HVDC Breaking Point

    Uppsats för yrkesexamina på avancerad nivå,

    Författare :Jesper Larsson; [2021]
    Nyckelord :Wind power; Offshore wind; Power systems; Transmission; HVAC; Reactive power; HVDC; VSC; MMC; Breaking point; LCOE; NPV;

    Sammanfattning : Offshore wind is rapidly growing and optimised grid connections are crucial for its success. Generally, costs and losses are higher for HVDC at short distances due to the converters, while HVAC costs and losses increase more rapidly with distance due to the ac cables. LÄS MER