Title :
Discussion on the relation between residual breakdown voltage and nondestructive parameters of stator insulation in generator
Author :
Jia, Zhidong ; Jiang, Xiongwei ; Xie, Hengkun ; Wang, Ruijun
Author_Institution :
State Key Lab. of Electr. Insulation for Power Equipment, Xi´´an Jiaotong Univ., China
Abstract :
A long-term accelerated aging test of generator stator insulation in the laboratory was conducted. Nondestructive parameters, such as dissipation factor (tan /spl delta/), capacitance (C) and the voltage (U/sub 12/) at which the current increases abruptly, were measured in the period of the aging test. The breakdown test was performed to determine residual breakdown voltage (BDV). The correlation coefficients between BDV and nondestructive parameters were compared. The most effective parameter to describe the aging condition of the stator insulation was U/sub 12/. The relationship between BDV and nondestructive parameters was also analyzed theoretically.
Keywords :
AC generators; ageing; capacitance; composite insulating materials; dielectric losses; electric breakdown; insulation testing; life testing; machine testing; nondestructive testing; stators; aging condition; capacitance; correlation coefficients; dissipation factor; epoxy mica insulation; generator stator insulation; long-term accelerated aging test; multi-stress aging; nondestructive parameters; residual breakdown voltage; Aging; Dielectrics and electrical insulation; Electrodes; Insulation testing; Laboratories; Low voltage; Nondestructive testing; Power generation; Stators; Thermal stresses;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2000. Proceedings of the 6th International Conference on
Conference_Location :
Xi´an, China
Print_ISBN :
0-7803-5459-1
DOI :
10.1109/ICPADM.2000.876392
