基于曲流技术和遗传算法的局部放电检测微带天线

基于微带天线原理设计了一种新型全向型局部放电特高频天线传感器。采用曲流技术对微带天线结构进行改进,增加天线的工作带宽。采用遗传算法对改进结构参数进行优化设计,使天线工作带宽达到最高。改进型微带天线的工作带宽为450 MHz~2 800 MHz,覆盖了局部放电特高频信号的主要频率范围。同时天线具有体积小、近似全向测量、增益高和灵敏度高的优点。模拟绝缘缺陷局部放电检测试验结果表明,该型天线可以有效检测典型局部放电特高频信号,满足变电站现场局部放电检测要求。

A Microstrip Antenna Detecting Partial Discharge Based on Meandering Technology and Genetic Algorithm

A novel omnidirectional partial discharge (PD) ultra-high frequency (UHF) antenna sensor is designed based on the microstrip antenna theory. In order to extend the operation bandwidth, the meandering technology is used to modify the structure of microstrip antenna. The genetic algorithm method is used to obtain the optimal parameter of modified structure, which makes operation bandwidth reach to the widest. The operation bandwidth of modified microstrip antenna is 450~2800MHz, which covers the mainly frequency range of PD UHF signal. Meanwhile, this antenna is also advanced for small size, omnidirectional measurement, high antenna gain and high sensitivity. The simulated insulation defect PD test results show that this antenna can detect the typical PD UHF signal effectively and meet the requirement of PD detection in substation.