摘要
To investigate the partial discharge (PD) online monitoring of transformers by ultra-high-frequency (UHF) approaches,high-qualified UHF antennas are focused on as one key technique. The size of UHF sensor used for PD UHF online monitoring in transformer is excessively large,therefore,it is not convenient for internal installation of transformer. Two types of compact UHF antennas with small sizes,a Hilbert fractal antenna and a small loop antenna are presented. PD experiments of three typically artificial insulation defects are executed and both antennas are used for PD measurement. The spectra of power via frequency of detected PD signals are analyzed and compared. The experimental results show that the Hilbert fractal antenna and small loop antenna are qualified for PD online UHF monitoring.
To investigate the partial discharge （PD） online monitoring of transformers by ultra-high-frequency （UHF） approaches, high-qualified UHF antennas are focused on as one key technique. The size of UHF sensor used for PD UHF online monitoring in transformer is excessively large, therefore, it is not convenient for internal installation of transformer. Two types of compact UHF antennas with small sizes, a Hilbert fractal antenna and a small loop antenna are presented. PD experiments of three typically artificial insulation defects are executed and both antennas are used for PD measurement. The spectra of power via frequency of detected PD signals are analyzed and compared. The experimental results show that the Hilbert fractal antenna and small loop antenna are qualified for PD online UHF monitoring.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2008年第11期2305-2310,共6页
High Voltage Engineering
基金
Project Supported by New Century ExcellentTalents of the Ministry of Education (NCET-06-0763)
the Foundation of the Key Project of the Science and Technology Depart ment inChongqing (CSTC2005AA6003)
关键词
超高频天线
局部放电
测量方法
电压
transformer
partial discharge
ultra-high-frequency
online monitoring
fractal antenna
small loop antenna
artificial insulation defects
