Title :
The development of a dynamic basis for the prediction of insulation failure in rotating machines
Author :
Li, Hong ; Nelson, J. Keith ; Azizi-Ghannad, Saber
Author_Institution :
Dept. of Electr. Power Eng., Rensselaer Polytech. Inst., Troy, NY, USA
Abstract :
After a brief discussion on the existing multistress aging models and diagnostic indicators of aging, this paper presents the philosophy of a Dynamic Aging Theory (DAT) and proposes a DAT-based dynamic multistress aging model. Necessary DAT formulation for HV machine insulation is developed and the model is tested against laboratory stator bar aging data. Discharge Stagnation Voltage (DSV), a derived partial discharge parameter, and the groundwall insulation response to a traveling acoustic wave are used as feedback elements. This approach is shown to be a meaningful and practical solution to a very complex problem
Keywords :
ageing; failure analysis; machine insulation; machine theory; partial discharges; stators; HV rotating machine; diagnosis; discharge stagnation voltage; dynamic aging theory; groundwall insulation; insulation failure; multistress aging model; partial discharge; stator bar; traveling acoustic wave; Aging; Dielectrics and electrical insulation; Geometry; Partial discharges; Predictive models; Rotating machines; Stators; Thermal stresses; Trees - insulation; Voltage;
Conference_Titel :
Electrical Insulation, 1998. Conference Record of the 1998 IEEE International Symposium on
Conference_Location :
Arlington, VA
Print_ISBN :
0-7803-4927-X
DOI :
10.1109/ELINSL.1998.704711
