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Time to breakdown studies for liquids of different physico-chemical nature

Abstract

An automated setup for testing dielectric performance of liquids in a small point-to-plane gap is presented. It provides step voltages with rise times around 30 ns, with amplitudes up to 90 kV. Breakdown studies of thirteen different liquids were conducted with a gap distance of 4 mm in a test cell containing 20 ml liquid. The liquids were circulated and filtered after each breakdown to remove carbonized particles and relax space charges. Time to breakdown versus applied voltage was recorded, and for streamers that stopped mid gap, shadow graphic images of streamer structures were taken. Multivariate correlation studies between streamer properties and physio-chemical parameters of liquids were made, indicating relevance of liquid evaporation and electronic states of molecules.

Category

Academic chapter/article/Conference paper

Client

  • Research Council of Norway (RCN) / 228850

Language

English

Author(s)

Affiliation

  • SINTEF Energy Research / Elkraftteknologi
  • Sweden

Year

2017

Publisher

IEEE conference proceedings

Book

2017 IEEE 19th International Conference on Dielectric Liquids - ICDL

Issue

2017

ISBN

978-1-5090-4877-9

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