Title :
Description of the DC behavior of aging phenomena in winding insulating systems
Author :
Busch, Rudolf ; Wang, Hongyu
Author_Institution :
The 12th Dept./Electr. Eng., Essen Univ., Germany
Abstract :
This paper presents a new model for the description of the DC behavior of aging phenomena in low voltage winding insulating systems. In this model the concerned aging phenomena are described by the postcharge-index, the initial up-current-index, the first-peak-time, and some other related indices, which are defined in this paper. The theoretical inferences of the DC behavior model to aging phenomena have been verified with the experimental results, which are obtained by a so called “Reverse-drive” aging test with rotating machines. The result of the research verifies that dielectric polarization plays an important role in the aging progression of low voltage winding insulating systems. It indicates also that the aging-state of winding insulating systems can be practically supervised by means of this description method for the DC behavior. This model can be used as an active tool for the estimation of the aging-state and fault prognosis for low voltage winding insulating systems
Keywords :
ageing; dielectric polarisation; equivalent circuits; failure analysis; insulation testing; machine insulation; machine testing; machine windings; DC behavior; LV insulation; aging phenomena; dielectric polarization; fault prognosis; first-peak-time; initial up-current-index; low voltage winding insulation; model; postcharge-index; reverse-drive aging test; rotating machines; winding insulating systems; Aging; Breakdown voltage; Cable insulation; Dielectrics and electrical insulation; Insulation testing; Low voltage; Machine windings; Polarization; System testing; Thermal stresses;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1996., IEEE 1996 Annual Report of the Conference on
Conference_Location :
Millbrae, CA
Print_ISBN :
0-7803-3580-5
DOI :
10.1109/CEIDP.1996.564643
