中文摘要：

为适应超高频（UHF）局部放电在线监测需要,设计了一种基于层叠式多臂Hilbert分形天线与电平扫描式采集系统的局部放电超高频监测智能传感器.通过在传统Hilbert分形辐射臂上增加寄生臂条以及引入层叠式贴片结构,设计了小尺寸、宽频带、高增益的层叠式多臂Hilbert分形天线作为智能传感器天线;并根据电平扫描式法开发了电平扫描式数据采集模块作为智能传感器数据采集单元.在实验室内进行空气中的针-板放电实验,并同时采用智能传感器和全波形采集法采集信号.结果表明,该传感器实现了超高频局部放电信号的高速处理,直接输出局部放电谱图,其输出数据量小,硬件简单成本低,设备体积小.2种采集方法得到的放电谱图相似程度高,验证了智能传感器能够准确地获取并处理局部放电信号.

英文摘要：

To satisfy the requirements of ultra-high frequency（UHF） partial discharge on-line monitoring, we proposed a novel smart sensor for UHF partial discharge online detection based on stacked multiple-arm Hilbert fractal antenna and level scanning system. Moreover, we improved the traditional Hilbert fractal patch by adding parasitic arm and cascading patch structure, and designed a cascading multiple-arm Hilbert fractal antenna with small size, wide frequency band and high gain, which was used as the antenna of smart sensor. The level scanning module for data collection obtained by level scanning method was used as the data acquisition unit of smart sensor. The needle-plate discharge experiment in air was carried out in laboratory, and the full waveform signal sample method and the smart sensor were used to capture and process the signal simultaneously. The experimental results show that the proposed smart sensor can process the UHF partial discharge signal quickly and directly, output the partial discharge figures with small amount of output data, and lower the cost of hardware and small volume of equipment. The discharge figures obtained by the two methods are nearly same, which proves that the smart sensor can capture and process the partial discharge signal accurately.