Search for dissertations about: "high voltage"

Showing result 1 - 5 of 615 swedish dissertations containing the words high voltage.

  2. 1. On high-frequency soft-switching DC-converters for high-voltage applications

    University dissertation from Stockholm : Elektrotekniska system

    Author : Per Ranstad; KTH.; [2004]
    Keywords : soft-switching; dc-converter; high-frequency; high-voltage;

    Abstract : .... READ MORE

  4. 2. Electric Power Generation and Storage Using a High Voltage Approach

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Björn Bolund; Uppsala universitet.; [2006]
    Keywords : Engineering physics; Flywheel; Generation; Generator; High Voltage; Power flow; Poynting; Teknisk fysik;

    Abstract : Production and consumption of electricity have grown enormously during the last century. No mater what the primary source of energy is, almost all generation of electricity comes from conversion of a rotational movement in a generator. The aim of this thesis is to see how high voltage technology influence production and storage of electricity. READ MORE

  5. 3. Control and Design Aspects of Components and Systems in High-Voltage Converters for Industrial Applications

    University dissertation from Stockholm : KTH

    Author : Per Ranstad; KTH.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-voltage converter; resonant converter; high-voltage transformer; transformer parasitics; IGBT; soft-switching; control; TECHNOLOGY Electrical engineering; electronics and photonics Electric power engineering; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elkraftteknik;

    Abstract : High-frequency dc-dc converters are widely used in power electronic applications, both in consumer products and industrial products. By operating the converter at higher frequencies both a smaller size and better control characteristics can be obtained. READ MORE

  6. 4. Development and application of high voltage dielectric spectroscopy for diagnosis of medium voltage XLPE cables

    University dissertation from Stockholm : Elektrotekniska system

    Author : Peter Werelius; KTH.; [2001]
    Keywords : dielectric spectroscopy; high voltage; variable frequency; diagnostics; non-disgnostics;

    Abstract : When polymer power cables were introduced into mediumvoltage applications in the late 1960s, the degradationphenomenon later referred to aswater treeingwas still unknown. However, this changedwithin a relatively short space of time. READ MORE

  7. 5. Three Phase Controlled Fault Interruption Using High Voltage SF6 Circuit Breakers

    University dissertation from Stockholm : Elektrotekniska system

    Author : Richard Thomas; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; controlled switching; high voltage; hypothesis testing; circuit breakers; fault interruption; least mean squares regression; power system protection;

    Abstract : A method is presented for implementing controlled fault interruption,using high voltage, SF6 circuit breakers on three phase high voltage powernetworks. The main goal of the method is to synchronize the opening or tripcommands to each phase of a circuit breaker with respect to target currentzero times so that each phase will interrupt with a preselected arcingtime. READ MORE