Sökning: "multilevel transmission"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden multilevel transmission.

  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. 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

  4. 3. A New Cell Bypass Arrangement and Control for Modular Multilevel Converters based on Thyristor Forced Commutation Circuit

    Master-uppsats, KTH/Skolan för elektro- och systemteknik (EES)

    Författare :Soteris Poyiadjis; [2017]
    Nyckelord :;

    Sammanfattning : HVDC transmission lines are a competitive and in some cases are proven to bea superior choice compared to AC transmission applications. Suitable convertershave been developed for that matter where Modulär Multilevel Converters (MMC)are highly preferred due to their low losses, no filtering requirementsand direct andfast control of AC and DC side. LÄS MER

  5. 4. REMITTANCES AND CORRUPTION IN MIGRANTS’ COUNTRIES OF ORIGIN Corruption Experience of Remittance Recipients in Latin America and the Caribbean

    Master-uppsats, Göteborgs universitet/Statsvetenskapliga institutionen

    Författare :Hang Nguyen Vu; [2016-09-16]
    Nyckelord :monetary remittance; social remittance; migration; petty corruption; sending countries; bribe payment; bribe solicitation; multilevel model; particularistic culture; political networks; social networks;

    Sammanfattning : This thesis aims to explore whether and how (monetary) remittance affects petty corruption in migrants’ countries of origin. Specifically, it investigates whether remittance recipients are more likely to pay bribes than non-recipients. Two arguments are put forward. LÄS MER

  7. 5. A multilevel stakeholder analysis of drivers and barriers in Poland's renewable energy development

    Master-uppsats, Lunds universitet/LUCSUS

    Författare :Olga Abramczyk; [2014]
    Nyckelord :multi-level perspective; Poland; renewable energy; drivers; transition theory; barriers; sustainability science; Earth and Environmental Sciences;

    Sammanfattning : Living in a world, where constantly growing energy consumption and climate change are issues of increasing concern, it is necessary to decrease fossil fuel consumption and promote more sustainable ways of gaining energy, such as renewables (IPCC, 2007). Poland as a member of the European Union was obliged to comply with European policies and increase its share of renewable energy by 2020. LÄS MER