Search for dissertations about: "converters"

Showing result 1 - 5 of 232 swedish dissertations containing the word converters.

  1. 1. Wave Energy Converters An experimental approach to onshore testing, deployments and offshore monitoring

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Liselotte Ulvgård; Uppsala universitet.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wave power; ocean energy; linear generator; measurements; sensors; point absorber; offshore; PTO; force; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Abstract : The wave energy converter (WEC) concept developed at Uppsala University consists of a point absorbing buoy, directly connected to a permanent magnet linear generator. Since 2006, over a dozen full scale WECs have been deployed at the Lysekil Research Site, on the west coast of Sweden. READ MORE

  2. 2. Grid Connected Three-Level Converters Studies for Wave Energy Conversion

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Remya Krishna; Uppsala universitet.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wave energy; power converters; control strategies; grid connection; Teknisk fysik med inriktning mot elektronik; Engineering Science with specialization in Electronics;

    Abstract : This thesis presents an electrical system analysis of a wave energy converter (WEC) for the objective of grid connection. To transfer the enormous amount of power from waves to the load centers, efficient power electronic systems are essential. READ MORE

  3. 3. Energy Evaluation for DC/DC Converters in DC-Based Wind Farms

    University dissertation from Chalmers University of Technology

    Author : Lena Max; Chalmers tekniska högskola.; Chalmers University of Technology.; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elkraftteknik; Electric power engineering; DC DC converter; loss evaluation; wind energy; hard switching converters; resonant converters; snubber design; measurements;

    Abstract : In this thesis the suitability of three topologies for DC/DC converters in a DC wind farm grid is investigated from an energy efficiency and energy production cost point of view. The three selected topologies are the fullbridge converter, the single active bridge converter and the series parallel resonant converter. READ MORE

  4. 4. On control of cascaded H-bridge converters for STATCOM applications

    University dissertation from Chalmers University of Technology

    Author : Ehsan Behrouzian; Chalmers tekniska högskola.; Chalmers University of Technology.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; STATCOM; cascaded H-bridge converters; Modular Multilevel Converters MMC ; FACTS.;

    Abstract : Cascaded H-bridge (CHB) converters are today considered the industrial standard for STATCOM applications, mainly due to their small footprint, high achievable voltage levels, modularity and reduced losses. However, there are still areas of research that need to be investigated in order to improve the performance and the operational range of this converter topology for grid-applications. READ MORE

  5. 5. High-Efficiency SiC Power Conversion Base Drivers for Bipolar Junction Transistors and Performance Impacts on Series-Resonant Converters

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Georg Tolstoy; KTH.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Silicon Carbide; Bipolar Junction Transistor BJT ; Resonant converter; Series-resonant converter SLR ; Base drive circuits; High- Efficiency Converters; High-Frequency Converters; Electrical Engineering; Elektro- och systemteknik;

    Abstract : This thesis aims to bring an understanding to the silicon carbide (SiC) bipolar junction transistor (BJT). SiC power devices are superior to the silicon IGBT in several ways. They are for instance, able to operate with higher efficiency, at higher frequencies, and at higher junction temperatures. READ MORE