Investigation of the Voltage Influence on Partial Discharge Characteristic Parameters in Solid Insulation

  • P. Valatka Kaunas University of Technology
  • V. Sučila Kaunas University of Technology
  • G. Daukšys Kaunas University of Technology


The solid insulations of electrical equipment are perpetually affected by various duration overvoltages and overcurrents. Depending on its duration, the overvoltage event can be transient—a voltage spike, or permanent, leading to a power surge. They all directly affect the insulation. Electric stress of insulation depends on its thickness and amplitude of applied voltage. The damaged solid insulation may also influence characteristic parameters of partial discharges. In the following paper there are discussed the voltage influence on partial discharge characteristic parameters in the solid insulation. Partial discharge values in different size and shapes of solid insulation defects under different voltage influence are evaluated.