Underwater positive streamer propagation with different insulation modes

Zhiyuan Li, Yi Liu, Siwei Liu, Xiandong Li, Guyue Zhou, Qin Zhang, Hua Li, Fuchang Lin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Application of the high voltage on the electrode system in water can lead to the induction of the streamer and the propagation of the streamer to the opposite electrode. In this paper, an underwater electrode system with a gap distance of 10mm is constructed. It is convenient for this system to investigate the development of the streamer. Whether the tip of the positive needle electrode is directly exposed to water is called direct liquid discharge or dielectric discharge, respectively. It is shown that during the pre-breakdown process, the positive streamer generated by direct liquid discharge is always induced near the positive needle electrode. The lower leakage current is beneficial to induce the breakdown voltage and improve the propagation speed. When the voltage across the gap is low, the gray bush-like subsonic streamers in the beginning is eventually turned to the bright filamentary supersonic streamers. In addition, the influence of the non-uniformity level of the electric field on the development of the initial streamer is compared and analyzed. Besides, one way to effectively reduce the pre-breakdown leakage energy is put forward.

Original languageEnglish
Title of host publication2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-4
Number of pages4
ISBN (Electronic)9781509048779
DOIs
Publication statusPublished - 2017 Nov 29
Externally publishedYes
Event19th IEEE International Conference on Dielectric Liquids, ICDL 2017 - Manchester, United Kingdom
Duration: 2017 Jun 252017 Jun 29

Publication series

Name2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017
Volume2017-January

Conference

Conference19th IEEE International Conference on Dielectric Liquids, ICDL 2017
CountryUnited Kingdom
CityManchester
Period17/6/2517/6/29

Keywords

  • Leakage current
  • Leakage energy
  • Pre-breakdown delay
  • Pulsed discharge
  • Streamers

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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