Search for dissertations about: "dielectric spectroscopy"

Showing result 1 - 5 of 67 swedish dissertations containing the words dielectric spectroscopy.

  1. 1. Watertree dielectric spectroscopy

    University dissertation from Institutionen för elkraftteknik

    Author : Peter Thärning; KTH.; [1997]
    Keywords : ;

    Abstract : .... READ MORE

  2. 2. Dielectric properties of poly(ethyelene-co-butyl acrylate) filled with Alumina nanoparticles

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Nadejda Jäverberg; KTH.; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nanocomposites; poly ethylene-co-butyl acrylate ; EBA; alumina; dielectric permittivity; absorbed water; humidity; temperature; dielectric spectroscopy; partial discharge; electrical treeing; TECHNOLOGY Electrical engineering; electronics and photonics Electrical engineering; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elektroteknik;

    Abstract : In this work dielectric properties of the poly(ethylene-co-butyl acrylate)filled with alumina nanoparticles are evaluated. These nanocomposite materialswere manufactured at the department of Fibre and Polymer Technology,KTH.This study is limited to the properties of general importance for the AC applications. READ MORE

  3. 3. 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

  4. 4. Partial discharges studied by dielectric response method

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Xiangdong Xu; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; frequency domain spectroscopy; AWIS; partial discharge excess current; dielectric characterization; partial discharge; non-PD excess current;

    Abstract : The increasing demand of integrating various renewable energy recourses in power system requires extensive use of power electronic solutions, which allows energy conversion between different frequencies and stabilizes the system. Consequently, other than the traditional 50/60 Hz sinusoidal voltage stresses act on the high voltage insulation systems. READ MORE

  5. 5. Electrical Insulating Properties of Poly(Ethylene-co-Butyl Acrylate) Filled with Alumina Nanoparticles

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Nadejda Jäverberg; KTH.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nanocomposites; poly ethylene-co-butyl acrylate ; EBA; alumina; dielectric permittivity; absorbed water; humidity; temperature; dielectric spectroscopy; breakdown strength; pre-breakdown current;

    Abstract : In this work the electrical insulating properties of the nanocomposite materials based on poly(ethylene-co-butyl acrylate) filled with alumina nanoparticles are studied. The dielectric properties chosen for the evaluation are the dielectric permittivity and loss as well as the breakdown strength and the pre-breakdown currents. READ MORE