Title :
Assessment of deterioration in epoxy/mica machine insulation
Author :
Kim, Y.J. ; Nelson, J.K.
Author_Institution :
Dept. of Electr. Power Eng., Rensselaer Polytech. Inst., Troy, NY, USA
Abstract :
Long-time accelerated aging tests in a laboratory environment have been conducted on generator stator insulation to identify meaningful diagnostic measures for the assessment of degradation and identification of aging mechanisms. A plurality of techniques are investigated and diagnostic parameter, the dynamic stagnation voltage, which appears to be correlated with delimination in the epoxy-mica structure, is proposed. The results provide a basis for an online interpretation method for insulation condition.<>
Keywords :
ageing; composite insulating materials; computerised monitoring; life testing; machine insulation; organic insulating materials; accelerated aging tests; aging mechanisms identification; degradation assessment; delimination; diagnostic measures; dynamic stagnation voltage; epoxy-mica structure; generator stator insulation; insulation condition; laboratory environment; long term testing; machine insulation; online interpretation method; plurality of techniques; Accelerated aging; Dielectric loss measurement; Dielectrics and electrical insulation; Electric variables measurement; Insulation testing; Laboratories; Pulse measurements; Stators; Thermal stresses; Voltage;
Journal_Title :
Electrical Insulation, IEEE Transactions on
