Ageing extent assessment of large generator insulation using advanced characterization techniques

Author

Xie, Hengkun

Author_Institution

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

fYear

2001

fDate

2001

Firstpage

653

Lastpage

656

Abstract

Ageing extent assessment of large generator insulation is of great significance for planning an effective outage and maintenance. In the past a few decades, the insulation condition of large generator was evaluated based on conventional dielectric parameters, which are found specific to some insulation system or testing condition, and so far are still controversial among researchers. In this paper, a set of advanced characterization parameters such as ultra-wideband frequency characteristics of PD, skewness of phase distribution of PD pulses, wavelet-transformed acoustic characteristics and ultrasonic wave propagation characteristics were proposed for ageing extent assessment of large generator insulation. Multistress ageing tests were performed and experimental results indicate that these advanced characterization techniques are prospective for ageing extent assessment and remaining lifetime estimation of large generator insulation

Keywords

ageing; electric generators; insulation testing; machine insulation; machine testing; partial discharge measurement; ultrasonic propagation; PD-pulses phase distribution skew; ageing extent assessment; dielectric parameters; insulation condition; large generator insulation; maintenance planning; multistress ageing tests; outage planning; testing condition; ultra-wideband frequency PD characteristics; ultrasonic wave propagation characteristics; wavelet-transformed acoustic characteristics; Acoustic pulses; Acoustic testing; Acoustic waves; Aging; Character generation; Dielectrics and electrical insulation; Frequency; Insulation testing; System testing; Ultra wideband technology;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulating Materials, 2001. (ISEIM 2001). Proceedings of 2001 International Symposium on

Conference_Location

Himeji

Print_ISBN

4-88686-053-2

Type

conf

DOI

10.1109/ISEIM.2001.973758

Filename

973758