基于特高频法检测电气设备局部放电的改进Vivaldi天线
发布时间：2018-12-26 18:33
【摘要】：为提高检测变电站电气设备局部放电产生的特高频(UHF)信号的有效性,基于超宽带渐变槽线天线理论,在传统Vivaldi天线的侧边增加渐变槽线和谐振腔后,通过仿真及实测发现,改进后的天线工作频段由1.2~3GHz扩展至0.5~3GHz。同时提高了天线的指向性,而保持工作频段上天线相位中心不变。改进后的天线在工作频段上具有更高的增益和灵敏度,在2GHz时增益达到7.9d Bi,平均灵敏度大于12mm。为验证所设计天线效果,在实验室搭建了基于预制缺陷变压器的试验平台,结果表明所设计的天线可以有效检测到局部放电的UHF信号。与传统Vivaldi天线、加脊TEM喇叭天线和螺旋天线相比,改进Vivaldi天线检测灵敏度较高,脉冲时域响应特性更好,利于进一步的信号分析。
[Abstract]:In order to improve the efficiency of detecting UHF (UHF) signals generated by partial discharge of substation electrical equipment, based on the theory of ultra-wideband tapered slot line antenna, after adding gradient slot line and resonant cavity to the side of traditional Vivaldi antenna, it is found by simulation and actual measurement. The improved antenna frequency band is extended from 1.2~3GHz to 0.5g / 3GHz. At the same time, the directivity of the antenna is improved, while the phase center of the antenna is kept unchanged in the working frequency band. The improved antenna has a higher gain and sensitivity in the operating frequency band, and the average sensitivity of the improved antenna is greater than 12mm when the gain reaches 7.9 d Bi, at 2GHz. In order to verify the effect of the designed antenna, a test platform based on prefabricated defective transformer is built in the laboratory. The results show that the designed antenna can effectively detect partial discharge (UHF) signals. Compared with the traditional Vivaldi antenna, the ridged TEM horn antenna and the spiral antenna, the improved Vivaldi antenna has higher detection sensitivity and better time-domain response characteristics, which is conducive to further signal analysis.
【作者单位】： 武汉大学电气工程学院;
【分类号】：TM855
[Abstract]:In order to improve the efficiency of detecting UHF (UHF) signals generated by partial discharge of substation electrical equipment, based on the theory of ultra-wideband tapered slot line antenna, after adding gradient slot line and resonant cavity to the side of traditional Vivaldi antenna, it is found by simulation and actual measurement. The improved antenna frequency band is extended from 1.2~3GHz to 0.5g / 3GHz. At the same time, the directivity of the antenna is improved, while the phase center of the antenna is kept unchanged in the working frequency band. The improved antenna has a higher gain and sensitivity in the operating frequency band, and the average sensitivity of the improved antenna is greater than 12mm when the gain reaches 7.9 d Bi, at 2GHz. In order to verify the effect of the designed antenna, a test platform based on prefabricated defective transformer is built in the laboratory. The results show that the designed antenna can effectively detect partial discharge (UHF) signals. Compared with the traditional Vivaldi antenna, the ridged TEM horn antenna and the spiral antenna, the improved Vivaldi antenna has higher detection sensitivity and better time-domain response characteristics, which is conducive to further signal analysis.
【作者单位】： 武汉大学电气工程学院;
【分类号】：TM855
【参考文献】
相关期刊论文 前10条
1 程养春;魏金清;李成榕;荣智海;王广真;马振丽;;局部放电作用下变压器匝间油纸绝缘加速劣化规律[J];电工技术学报;2015年18期
2 叶海峰;钱勇;刘宗杰;盛戈v，
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