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Visar resultat 1 - 5 av 32 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Evaluating Resistance to Corona and Ozone in Polymeric Materials for High Voltage Outdoor Applications

   Författare :Bin Ma; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ozone; housing material; nano-composite; corona; Outdoor insulation; composite insulation;

   Sammanfattning : Resistance to corona discharges and ozone, the well known ageing factors for polymeric materials used in outdoor insulation, has been listed as being of great importance among twelve properties identified by CIGRE WG D1.14 – Material Properties for Non-ceramic Outdoor Insulation. LÄS MER

3. 2. Effects of Corona and Ozone Exposure on Properties of Polymeric Materials for High Voltage Outdoor Applications

   Författare :Bin Ma; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; surface resistivity; silicone rubber; nanocomposite; Outdoor insulation; ozone treatment; dielectric response; hydrophobicity; corona treatment; composite insulation; volume resistivity; ageing.; mechanical strength;

   Sammanfattning : Despite the past four decades of service experiences with polymeric insulators in power systems all over the world, an adequate standard allowing for proper selection of polymeric materials for applications in high voltage outdoor environments has still been lacking. Therefore CIGRE Working Group D1. LÄS MER

4. 3. Outdoor aging of silicone rubber formulations in coastal environment

   Författare :Tomas G Gustavsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; material forulation; coastal environment; polydimethylsiloxane PDMS ; filler level; outdoor insulation; aging; silicone rubber; polymeric insulators; surface characterization; leakage current measurements;

   Sammanfattning : .... LÄS MER

5. 4. Biofilms on silicone rubber for outdoor high voltage insulation

   Författare :Stina Wallström; Sigbritt Karlsson; Paul Gatenholm; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical engineering; polymer technology; Kemiteknik; Chemical engineering; Kemiteknik;

   Sammanfattning : Silicone rubber high voltage insulators are sometimes colonised by microorganisms which form a biofilm on the surface of the infected unit. In this work insulators exposed to the outdoor environment in Sweden, Sri Lanka and Tanzania respectively have been studied. LÄS MER

7. 5. Diagnostic Methods for Composite Insulators with Biological Growth

   Författare :Andreas Dernfalk; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; algae; composite insulators; Hough transform; biological contamination; outdoor insulation; digital image analysis; laser-induced fluorescence LIF ; fungi; diagnostic methods;

   Sammanfattning : Composite insulators have a number of advantages compared to conventional insulators, but the fact that they are more prone to aging is a major drawback. For instance, biological growths, like algae and fungi, have been found to colonize composite insulators, and possibly effecting the insulation performance. LÄS MER