摘要
为检测气体绝缘开关设备(GIS)局部放电的超高频(UHF)信号,基于分形技术设计了一种超宽带小型天线。对天线的几何参数进行了优化仿真。该天线的回波损耗(S11)小于10 dB带宽为0.5~1.5 GHz(相对带宽为100%),在频带内方向性良好,能够实现全向辐射;天线具有较高增益,在0.5~1 GHz频带内方向图主瓣增益为2~4 dB;天线尺寸较小,实际尺寸为200、160、1.6 mm。搭建了模拟局部放电的实验平台,对研制的天线进行测试,结果表明,基于树状分形超宽带天线的UHF局放检测系统抗干扰能力强,可用于GIS现场局部放电检测。
An was designed （GIS） partial ultra-wideband （UWB）compact tree-shape antenna, which integrates the fractal technology, for detecting the ultra-high frequency （UHF） signals generated from gas insulated switchgear discharge （PD）. The geometrical parameters of the antenna were optimized through computer simulation. The fractal antenna offers the return loss（Sn） less than -10 dB and the bandwidth in the range of 0.5 to 1.5 GHz （relative bandwidth is 100% ）, and it has good great directivity and omnidirectional radiation feature. Besides, the antenna achieves a high gain, e.g., the main lobe gain is about 2~4 dB in the range of 0.5-1 GHz, and it has a compact size of 20,160,1.6 mm. The antenna was tested on a discharge simulation platform in laboratory. The results show that the UHF PD monitoring system based on uhra-wideband fractal tree-shape antenna has strong anti-interference ability and can be applied to on-line PD monitoring applications.
出处
《高压电器》
CAS
CSCD
北大核心
2017年第6期118-123,共6页
High Voltage Apparatus
基金
国家电网公司科技项目(5212001600DL)~~
