Study on the aging condition of stator bar based on Ultra-wideband PD detection technique

Author

Bo, Yue ; Xiaolin, Chen ; Xiang, Sun ; Xie, Hengkun

Author_Institution

State Key Lab. of Electr. Insulation for Power Equip., Xi´´an Jiaotong Univ., China

Volume

1

fYear

2003

fDate

1-5 June 2003

Firstpage

220

Abstract

In this paper, the accelerated aging experiment based on the stator bar of 780 kW/6 kV large motor had been conducted in the laboratory in order to simulate the practical aging of large motor or generator in service. The PD of insulation was measured at the end of each aging cycle by using the Ultra-Wide-Band (UWB) PD detection technique. Moreover, the developing characteristics of PD in time-domain and frequency-domain were analyzed by using FFT. The experiment results showed that the high-frequency surge of time-domain wave became more and more severe and the width of PD pulse always shortened with aging time. The high-frequency components in frequency-domain became richer with aging time. In addition, the number of peak in frequency spectrum increased and the main peak of frequency spectrum moved gradually to the high frequency with deterioration of insulation.

Keywords

ageing; data acquisition; frequency-domain analysis; machine insulation; partial discharges; stators; time-domain analysis; Ultra-wideband PD detection; aging; frequency-domain analysis; generator; insulation; stator bar; time-domain analysis; ultra-wideband partial discharge detection; Aging; Dielectrics and electrical insulation; Electrons; Frequency domain analysis; Laboratories; Partial discharges; Stators; Thermal stresses; Time domain analysis; Ultra wideband technology;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 2003. Proceedings of the 7th International Conference on

ISSN

1081-7735

Print_ISBN

0-7803-7725-7

Type

conf

DOI

10.1109/ICPADM.2003.1218392

Filename

1218392