Search for dissertations about: "Flux modulation"

Showing result 1 - 5 of 27 swedish dissertations containing the words Flux modulation.

  1. 1. On Power-system Benefits, Main-circuit Design, and Control of StatComs with Energy Storage

    University dissertation from Stockholm : KTH

    Author : Hailian Xie; KTH.; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy storage; Voltage source converter; VSC; Static synchronous compensation; StatCom; Active power compensation; Phase jump; Voltage dip; Weak network; Flux modulation; Deadbeat current control; Transformer saturation; Dual thyristor converter; dc interface; TECHNOLOGY Electrical engineering; electronics and photonics Electrical engineering; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elektroteknik; TECHNOLOGY Electrical engineering; electronics and photonics Electric power engineering; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elkraftteknik;

    Abstract : Static synchronous compensation (StatCom) is an application that utilizes a voltage source converter (VSC) to provide instantaneous reactive power support to the connected power system. Conventionally, StatComs are employed for reactive power support only. READ MORE

  2. 2. Voltage Source Converters with Energy Storage Capability

    University dissertation from Stockholm : KTH

    Author : Hailian Xie; KTH.; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Voltage source converter; StatCom; Energy storage; Active power compensation; Phase jump; Voltage dip; VSC; Weak network; Flux modulation; deadbeat control; TECHNOLOGY Electrical engineering; electronics and photonics Electric power engineering; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elkraftteknik;

    Abstract : This project deals with voltage source converters with energy storage capability. The main objective is to study the possible benefits of energy storage to a power system with a VSC as the interface between them.First of all, a converter control system is proposed for a two level VSC. READ MORE

  3. 3. Sex and stress steroid modulation of GABA mediated chloride ion flux in rat CNS

    University dissertation from Umeå : Klinisk vetenskap

    Author : Jessica Strömberg; Umeå universitet.; [2007]
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; allopregnanolone; chloride ion uptake; patch-clamp; 3beta-steroids; kinetic parameters; rat brain; VETERINARY MEDICINE Obstetrics and gynaecology; VETERINÄRMEDICIN Obstetrik och gynekologi;

    Abstract : Background: Sex and stress steroids are metabolized to 3a-hydroxy-pregnane-steroid metabolites such as allopregnanolone (Allo) and tetrahydrodeoxycorticosterone (THDOC). Allo and THDOC are neuroactive steroids that are metabolized in the brain and act in brain as potent positive GABAA receptor function modulators. READ MORE

  4. 4. Intrinsic tunneling spectroscopic investigations of Bi2Sr2CaCu2O8+x superconductors : The fluxon lattice, resonant phenomena,flux-flow and current doping

    University dissertation from Department of Physics, Stockholm University

    Author : Holger Motzkau; Stockholms universitet.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In this thesis, the tunneling between individual atomic layers in structures of Bi2Sr2CaCu2O8+x based high-temperature superconductors are experimentally studied employing the intrinsic Josephson effect. A special attention is paid on the fabrication of small mesa structures using micro and nanofabrication techniques. READ MORE

  5. 5. Measurements of cosmic ray antiprotons with PAMELA and studies of propagation models

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Juan Wu; KTH.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; cosmic ray; PAMELA; antiproton flux; propagation;

    Abstract : Studying the acceleration and propagation mechanisms of Galactic cosmic rays can provide information regarding astrophysical sources, the properties of our Galaxy, and possible exotic sources such as dark matter. To understand cosmic ray acceleration and propagation mechanisms, accurate measurements of different cosmic ray elements over a wide energy range are needed. READ MORE