用于检测电晕放电的射频天线的设计与研究

Design and Research on RF Antenna for Corona Discharge Detection

电晕放电现象在电力系统中频频发生。由于电晕放电会向周围空间中辐射射频电磁波,因此可通过检测射频电磁波来实现电晕放电的检测。设计了两种小型天线来检测电晕放电,分别是矩形螺旋天线和Hilbert天线。通过模拟仿真和分析对比,发现Hilbert天线的发射系数特性更佳,可实现设计要求。通过设计优化得到的最终结构是6阶Hilbert天线,该天线的尺寸为100 mm×100 mm×1.6 mm,具备轻量便携的特点。

Corona discharge is a common phenomenon in power systems.Because corona discharge will radiate radio frequency(RF)electromagnetic waves to the surrounding space,the detection of corona discharge can be realized by detecting RF electromagnetic waves.In this study,two miniaturized antennas are designed to detect corona discharge in electrical equipment.These antennas are rectangular spiral antenna and Hilbert antenna.Through simulation and comparison,it is found that Hilbert antenna unit is the best and the final structure is the 6 order Hilbert antenna.The final size of this antenna is 100 mm×100 mm×1.6 mm,which is portable and lightweight.