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You searched for subject:(water drop corona). One record found.

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Queensland University of Technology

1. Hinde, David Derek. Corona discharges on the surfaces of high voltage composite insulators.

Degree: 2009, Queensland University of Technology

The degradation of high voltage electrical insulation is a prime factor that can significantly influence the reliability performance and the costs of maintaining high voltage electricity networks. Little information is known about the system of localized degradation from corona discharges on the relatively new silicone rubber sheathed composite insulators that are now being widely used in high voltage applications. This current work focuses on the fundamental principles of electrical corona discharge phenomena to provide further insights to where damaging surface discharges may localize and examines how these discharges may degrade the silicone rubber material. Although water drop corona has been identified by many authors as a major cause of deterioration of silicone rubber high voltage insulation until now no thorough studies have been made of this phenomenon. Results from systematic measurements taken using modern digital instrumentation to simultaneously record the discharge current pulses and visible images associated with corona discharges from between metal electrodes, metal electrodes and water drops, and between waters drops on the surface of silicone rubber insulation, using a range of 50 Hz voltages are inter compared. Visual images of wet electrodes show how water drops can play a part in encouraging flashover, and the first reproducible visual images of water drop corona at the triple junction of water air and silicone rubber insulation are presented. A study of the atomic emission spectra of the corona produced by the discharge from its onset up to and including spark-over, using a high resolution digital spectrometer with a fiber optic probe, provides further understanding of the roles of the active species of atoms and molecules produced by the discharge that may be responsible for not only for chemical changes of insulator surfaces, but may also contribute to the degradation of the metal fittings that support the high voltage insulators. Examples of real insulators and further work specific to the electrical power industry are discussed. A new design concept to prevent/reduce the damaging effects of water drop corona is also presented.

Subjects/Keywords: corona discharges; discharge current; onset voltage; point-plane; repetition rate; Trichel pulse; emission spectra; silicone rubber; water drop corona; high voltage insulators

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Hinde, D. D. (2009). Corona discharges on the surfaces of high voltage composite insulators. (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/29320/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Hinde, David Derek. “Corona discharges on the surfaces of high voltage composite insulators.” 2009. Thesis, Queensland University of Technology. Accessed January 17, 2020. https://eprints.qut.edu.au/29320/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Hinde, David Derek. “Corona discharges on the surfaces of high voltage composite insulators.” 2009. Web. 17 Jan 2020.

Vancouver:

Hinde DD. Corona discharges on the surfaces of high voltage composite insulators. [Internet] [Thesis]. Queensland University of Technology; 2009. [cited 2020 Jan 17]. Available from: https://eprints.qut.edu.au/29320/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hinde DD. Corona discharges on the surfaces of high voltage composite insulators. [Thesis]. Queensland University of Technology; 2009. Available from: https://eprints.qut.edu.au/29320/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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