Title :
The characteristics of ultra-wideband partial discharge of insulation in aging process
Author :
Yonghong, Cheng ; Hengkun, Xie ; Jianchang, Song ; Yan, JIANG ; Taiqiu, Zheng
Author_Institution :
Lab. of Electr. Insulation for Power Equip., Xi´´an Jiaotong Univ., China
Abstract :
The characteristics of the partial discharge (PD) in the aging process of insulation are studied in an ultra-wideband range from 0 to 500 MHz in this paper. The electrical or thermal aging of epoxy samples involving cavities with cone-cone electrode or needle-plate electrode systems are conducted. A TE571 PD detector is used to distinguish the discharge classification, and an ultra-wideband PD detecting system is employed for detecting ultra-wideband PD characteristics of insulation in aging process. The experimental results show that the major characteristic peaks of these insulation samples locate in the frequency ranges of such as 0~75 MHz, 150~200 MHz. In addition, the discharge characteristics of stator bar insulation samples of a 300 MW turbo-generator out of service is also measured, indicating that characteristic peaks locate in the frequency range of 100~125 MHz
Keywords :
ageing; epoxy insulation; insulation testing; machine insulation; machine testing; partial discharge measurement; stators; turbogenerators; 0 Hz to 500 MHz; 300 MW; TE571 PD detector; aging process; cavities; cone-cone electrode; discharge classification; epoxy samples; insulation; needle-plate electrode; stator bar insulation; thermal aging; turbo-generator; ultra-wideband partial discharge; Aging; Detectors; Electrodes; Fault location; Frequency; Insulation; Partial discharges; Stators; Thermal conductivity; Ultra wideband technology;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2000. Proceedings of the 6th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
0-7803-5459-1
DOI :
10.1109/ICPADM.2000.875663
