| 引用本文: | 李剑,宁佳欣,金卓睿,王有元,李溟.变压器局部放电在线监测超高频Hilbert分形天线研究[J].电力自动化设备,2007,27(6):31-35 |
| .Research on UHF Hilbert fractal antenna for online transformer PD monitoring[J].Electric Power Automation Equipment,2007,27(6):31-35 |
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| 摘要: |
| 论述了Hilbert分形天线基本原理,并根据分形天线电磁场理论,提出了应用于变压器局部放电超高频在线监测的Hilbert分形天线优化设计方法。通过仿真计算,研究了几何参数对Hilbert分形天线性能的影响,设计出用于变压器局部放电监测的3阶Hilbert分形天线。通过气隙放电、沿面放电、电晕放电3种典型变压器绝缘缺陷局部放电实验,采用分形天线和脉冲电流传感器对这3种局部放电进行了测量,并分析了分形天线的局部放电测量信号功率谱。实验结果证明该天线能够有效应用于变压器局部放电超高频在线监测。 |
| 关键词: 变压器,局部放电,在线监测,超高频检测,分形天线 |
| DOI： |
| 分类号:TM855 |
| 基金项目:重庆市科委科技计划重大项目(CSTC2005AA6003)，教育部新世纪优秀人才支持计划资助(NCET-06-0763)~~ |
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| Research on UHF Hilbert fractal antenna for online transformer PD monitoring |
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LI Jian NING Jia-xin JIN Zhuo-rui WANG You-yuan LI Ming
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| Abstract: |
| The basic principle of Hilbert fractal antenna is discussed and an optimized method to design Hilbert fractal antennas for online monitoring of transformer PD(Partial Discharge) based on the fractal antenna electromagnetic theory is proposed.Influences of geometric parameters on the capability of Hilbert fractal antennas are researched by simulation.A 3rd-order Hilbert fractal antenna is designed for online monitoring of transformer PD.The PD experiments of three typical and artificial insulation defects:gap discharge,surface discharge and corona discharge,are carried out,and both fractal antenna and pulse current sensor are used for PD measurement.The power spectrums of pulse signals detected by the fractal antenna are analyzed.Experimental results show that the Hilbert fractal antenna is qualified for online PD UHF(Ultra-High-Frequency) monitoring. |
| Key words: transformer,partial discharge,online monitoring,ultra-high-frequency detection,fractal antenna |
