摘要
相比脉冲电流法,超高频法更适用于在线监测中检测局部放电信号。为此,设计了一种用于气体绝缘组合电器(GIS)局部放电检测的外置矩形平面螺旋天线传感器。该传感器可方便地从盆式绝缘子处接收局部放电产生的电磁泄漏信号,并能有效抑制周围空间低频电磁干扰。同时,采用矩形平面螺旋、终端蝶形振子加载、金属背腔等技术手段,既满足了天线小型化的要求,又能得到较好的驻波比特性。理论计算和实验室实测特性数据表明,该宽带天线在超高频(UHF)频段内,有较好的检测性能,并具有多频段选择特性。
Compared with the impulse current method, the ultra-high frequency（UHF） is more suitable for online monitoring and detecting partial discharge（PD） signals. Hence we designed a sensor of rectangular planar spiral antenna for detecting PD in gas insulation substations（GISs）, which could expediently receive the electromagnetic wave leaked from basin-type insulator, and effectively suppress low-frequency electromagnetic interference. In order to miniaturize the antenna and obtain an optimized standing-wave ratio characteristics, certain effective structures such as rectangular planar spiral, terminal butterfly vibrator loads, and mental backing cavity were utilized in the antenna. The model calculation and the experimental data measured in the laboratory show that the antenna possesses a good radiating performance and a multi-band property in the UHF band.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2014年第11期3418-3423,共6页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2009CB724506)~~
