Sökning: "polymeric insulation"

Visar resultat 1 - 5 av 27 avhandlingar innehållade orden polymeric insulation.

  1. 1. Voltage Stabilizers: From Design to Synthesis, Processing and Electrical Characterization

    Detta är en avhandling från Chalmers University of Technology

    Författare :Markus Jarvid; Chalmers tekniska högskola.; Chalmers University of Technology.; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polyethylene; XLPE; Electrical treeing; Voltage stabilizer; Degradation; Cable; Insulation;

    Sammanfattning : Voltage stabilizers are additives capable of inhibiting electrical treeing; a degradation mechanism for insulation materials subjected to strong divergent electric fields. The intended use is in cross-linked polyethylene (XLPE) high voltage power cable insulation where minute defects in the manufacturing process can give rise to the conditions needed for the initiation of treeing, which in the worst case scenario leads to failure of the insulation system with blackouts and expensive repairs as a consequence. LÄS MER

  2. 2. Polyethylene – metal oxide particle nanocomposites for future HVDC cable insulation : From interface tailoring to designed performance

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Dongming Liu; KTH.; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HVDC; electrical insulation; core-shell nanoparticles; surface modification; silane chemistry; nanocomposites; polyethylene; adsorption; long-term stability; interface; particle dispersion; cavitation; conductivity; HVDC; elektrisk isolation; ytmodifiering; silankemi; nanokompositer; polyeten; adsorption; långtidsstabilitet; ytskikt; partikeldispergering; kavitation; ledningsförmåga; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : Low-density polyethylene (LDPE) nanocomposites containing metal oxide nanoparticles are considered as promising candidates for insulating materials in future high-voltage direct-current (HVDC) cables. The significant improvement in dielectric properties compared with unfilled polymer is attributed to the large and active interface between the nanoparticles and the polymer. LÄS MER

  3. 3. Polyethylene/metal oxide nanocomposites for electrical insulation in future HVDC-cables probing properties from nano to macro

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Love Pallon; KTH.; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nanocomposites; polyethylene; particle dispersion; high voltage direct current cables; HVDC; HVDC insulation; MgO; intermodulation electrostatic force microscopy; ptychography; electrical tree; Nanokompositer; polyeten; HVDC; HVDC-kabel; HVDC-isolering; MgO; elektrisk isolation; partikeldispergering; elektriska träd; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : Nanocomposites of polyethylene and metal oxide nanoparticles have shown to be a feasible approachto the next generation of insulation in high voltage direct current cables. In order to reach an operationvoltage of 1 MV new insulation materials with reduced conductivity and increased breakdown strengthas compared to modern low-density polyethylene (LDPE) is needed. LÄS MER

  4. 4. Polyethylene Blends, a Material Concept for Future HVDC-cable Insulation

    Detta är en avhandling från Chalmers University of Technology

    Författare :Mattias Andersson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2017]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; polyethylene; thermomechanical properties; nanocomposites; High-voltage insulation; polymer blends; conductivity; tie-chain;

    Sammanfattning : High-voltage cables are a critical component of tomorrow’s power grids that seamlessly integrate hydro, wind and solar power. Further improvements in transmission capacity of both high-voltage alternating- and direct-current, HVAC and HVDC, cables are likely reached through improved insulation materials. LÄS MER

  5. 5. Characterization of Conduction and Polarization Properties of HVDC Cable XLPE Insulation Materials

    Detta är en avhandling från stockholm : KTH Royal Institute of Technology

    Författare :Hossein Ghorbani; KTH.; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HVDC insulation; power cable insulation; cross-linked polyethylene insulation; conductivity; dielectric losses; space charge; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : High voltage direct current (HVDC) cables with extruded insulation system were introduced in 1998. Since then this technology has been growing rapidly with many installations that are today operational at voltages up to 320 kV. LÄS MER