高电压技术2017，Vol.43Issue(5)：1476-1484,9.DOI:10.13336/j.1003-6520.hve.20170428012
变电站局部放电的定向天线多方位检测定位方法
Partial Discharge Localization Method by Multi-direction Measurement Using Directional Antenna in Substation
摘要
Abstract
In order to obtain a more precise result of the partial discharge (PD) localization in the substation,we proposed a localization method based on directional antennas and multi-direction measurement.Moreover,we studied the principle of the directional antenna used in PD localization,and analyzed its limitation in the practical application.The time difference was calculated by the cross-correlation algorithm based on the wave head of the ultrahigh frequency (UHF) signal.The localization result was calculated by the stepped-net search method and particle swarm optimization.A localization experiment by a simulated PD source was carried out in a 220 kV substation.The results shows that,compared with omnidirectional antenna,the detection ability of weak signals is improved by the directional antenna,and the multipath effect is suppressed.The accuracy of the localization result is improved effectively compared with the existing localization method.The research has a practical value for locating the PD source accurately in substation.关键词
局部放电定位/变电站/定向天线/多方位检测/首波互相关算法Key words
partial discharge location/substation/directional antenna/multi-direction measurement/cross-correlation algorithm based on wave head引用本文复制引用
周文俊,李鹏飞,杨帅,刘宇舜,田妍,王勇..变电站局部放电的定向天线多方位检测定位方法[J].高电压技术,2017,43(5):1476-1484,9.基金项目
广州供电局有限公司科技项目(GZHKJ00000008).Project supported by Science and Technology Project of Guangzhou Power Supply Bureau Co.,Ltd.(GZHKJ00000008). （GZHKJ00000008）
