高电压技术2012，Vol.38Issue(8)：2091-2096,6.
Characteristic Analysis of Partial Discharges and Dissolved Gases Generated Cavityin Oil-paper Insulation Under AC-DC Combined Voltages
Characteristic Analysis of Partial Discharges and Dissolved Gases Generated Cavityin Oil-paper Insulation Under AC-DC Combined Voltages
摘要
Abstract
Oil-paper insulation is used within most of high voltage direct current（HVDC） converter transformers.Partial discharge（PD） in oil-paper insulation is a major reason for the development of internal faults in HVDC converter transformer,while PDs in oil-paper insulation mainly occur in terms of gas cavity discharges.There are few study results on the development characteristics of partial discharges in oil-paper insulation and dissolved gases in oils of HVDC converter transformers.Based on a gas cavity discharge model of oil-paper insulation,the present study investigates the development characteristics of partial discharges under AC-DC combined voltages and emphatically examines the variation characteristics of dissolved gases in the discharge development process.Experiment and analysis results show that the characteristics of partial discharges and dissolved gases in oils under AC-DC combined voltages are appreciably different with those under AC voltage.These results provide theoretical support for further research on partial discharges and on dissolved gases of other internal insulating defects and are helpful for the fault diagnosis of HVDC converter transformers.关键词
局部放电/射频信号/放电量/高电压技术Key words
HVDC converter transformer/AC-DC combined voltages/oil-paper insulation/partial discharge/dissolved gases分类
信息技术与安全科学引用本文复制引用
HE Zhiman,LI Jian,BAO Lianwei,JIANG Tianyan,WANG Youyuan..Characteristic Analysis of Partial Discharges and Dissolved Gases Generated Cavityin Oil-paper Insulation Under AC-DC Combined Voltages[J].高电压技术,2012,38(8):2091-2096,6.基金项目
supported by National High-tech Research and Development Program of China（863 Program） （）
National Science Foundation of China （）
Scientific Innovation of Colleges and Universities （）
