Contamination initiated flashover of insulators in generating stations

S. Venkataraman, R. S. Gorur, K. Shenoi

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

2 Scopus citations

Abstract

This paper analyzes flashovers of apparatus insulators that occurred in a 345 kV generating station. It has been shown that flashovers can occur with low levels of surface contamination and is attributed to factors such as, wind blown cooling tower drifts and highly nonlinear electric field distribution on the insulator surface. Computation of the electric field on the insulator surface confirmed that the spikes in electric field distribution created by dry and wet regions was sufficient to initiate multiple arcs along the insulator surface. The presence of moisture in the air gap between successive sheds provides additional electric field enhancement, but some contamination on the surface is required to initiate the flashover process. There is a need for improved models to explain flashover of insulators in EHV and UHV systems.

Original languageEnglish (US)
Title of host publicationAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
Pages811-814
Number of pages4
DOIs
StatePublished - 2007
Event2007 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Vancouver, BC, Canada
Duration: Oct 14 2007Oct 19 2007

Other

Other2007 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
CountryCanada
CityVancouver, BC
Period10/14/0710/19/07

ASJC Scopus subject areas

  • Engineering(all)
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Contamination initiated flashover of insulators in generating stations'. Together they form a unique fingerprint.

  • Cite this

    Venkataraman, S., Gorur, R. S., & Shenoi, K. (2007). Contamination initiated flashover of insulators in generating stations. In Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP (pp. 811-814). [4451627] https://doi.org/10.1109/CEIDP.2007.4451627