Charge simulation based electric field analysis of composite insulators for HVDC lines

Jiahong He, Ravi S. Gorur

Research output: Contribution to journalArticle

12 Scopus citations


This paper illustrates a charge simulation method based computation of electric potential and field of composite insulators for HVDC lines. The electric field is calculated under both dry and wet conditions and compared to AC line insulators. The results indicate that for the same nominal voltage, the electric field for DC lines is higher than for ac lines, thereby necessitating larger field control devices (corona and grading rings) for DC insulators. A process for optimizing corona and grading ring dimensions is described and applied for 500 kV HVDC lines.

Original languageEnglish (US)
Article number7031503
Pages (from-to)2541-2548
Number of pages8
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Issue number6
StatePublished - Dec 2014



  • HVAC
  • HVDC
  • aging
  • charge simulation method
  • corona ring
  • grading ring
  • surface resistivity
  • wet surface

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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