2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena 2009
DOI: 10.1109/ceidp.2009.5377890
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Partial discharges of thermally and electrically aged insulation

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Cited by 8 publications
(4 citation statements)
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“…Unfortunately we are short of researches on the mechanism because there could be various reasons, for example, conductivity attenuation because of water and pollutants intrusion or energy loss in the process of polarization, corona discharge as well as partial discharge at defected sites. All of these phenomena have the potential to cause abnormal heating . Therefore, the analysis of heating mechanism should depend closely on the environment and the aging extent of insulators .…”
Section: Introductionmentioning
confidence: 99%
“…Unfortunately we are short of researches on the mechanism because there could be various reasons, for example, conductivity attenuation because of water and pollutants intrusion or energy loss in the process of polarization, corona discharge as well as partial discharge at defected sites. All of these phenomena have the potential to cause abnormal heating . Therefore, the analysis of heating mechanism should depend closely on the environment and the aging extent of insulators .…”
Section: Introductionmentioning
confidence: 99%
“…For the first minutes the temperature rise inside the lamination stack caused by the losses inside the windings should nearly not differ according to (2), because the energy input of the windings is relatively small compared to the mass and thermal capacity of the lamination stack. The influence of the surrounding air can be neglected, because the general room temperature is constant at the beginning.…”
Section: B Thermal Behaviormentioning
confidence: 98%
“…Furthermore, the resin protects the windings against environmental influences such as transmission fluid. All mentioned characteristics of the impregnation have a positive impact on the lifetime of the electrical machine [2].…”
Section: Introductionmentioning
confidence: 99%
“…Ice-shedding happens when the ice formed on conductors suddenly drops off (under natural conditions, such as temperature rise and wind action or man-made shocks) [1]. This will cause high-amplitude oscillations of the conductors and large transient forces on the insulators and towers [2]. Also this may lead to the flashover if the phase-to-phase or phase-to-tower distance is smaller than the tolerable insulation distance.…”
Section: Introductionmentioning
confidence: 99%