Corona (Partial Discharge) Rehabilitation Case Study High Voltage Stator Windings

Published Jul 13th, 2023 IRMC 2023 - Javier Portos

Partial Discharge: Often used interchangeably with Corona

  • Electrical discharges that occur across voids in high voltage insulation systems
  • Voids or separations can occur due to manufacturing process defects, thermal deterioration, mechanical movement during operation, and other factors
  • A transient gaseous ionization and carbonization occurs in an insulation system
    when the electric stress exceeds a critical value
  • This ionization in the void produces partial discharges (Paschen’s Law)

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