特高频传感器等效高度的频域参考测量方法
发布时间：2018-12-26 10:47
【摘要】：在特高频传感器等效高度时域测量方法中,频率分辨率和测量误差是一对不可调和的矛盾,若采样时间短则频率分辨率低,若采样时间长则测量误差大。为解决这个问题,提出了频域参考测量方法。在此方法中,以某一频率的正弦电压波形作为GTEM小室的输入信号,然后测量参考传感器和待测传感器在该频率下的响应,最后利用响应特性和参考传感器等效高度计算出待测传感器的等效高度。建立了频域参考测量系统,包括:网络分析仪、GTEM小室、参考天线等。利用该系统对长度为50 mm的单极子探针天线的等效高度进行了测量,并将测量结果与时域方法的测量结果进行了对比。测试结果表明,利用频域参考测量方法测得的等效高度频率分辨率高、测量误差和分散性小。提出的频域参考测量方法将有利于推进特高频传感器标准化工作,提高GIS局部放电检测效率。
[Abstract]:In UHF sensor equivalent height time domain measurement method, the frequency resolution and measurement error are a pair of irreconcilable contradictions. If the sampling time is short, the frequency resolution is low, and if the sampling time is long, the measurement error is large. To solve this problem, a frequency domain reference measurement method is proposed. In this method, the sinusoidal voltage waveform of a certain frequency is used as the input signal of the GTEM cell, and then the response of the reference sensor and the sensor to be tested at that frequency is measured. Finally, the equivalent height of the sensor to be tested is calculated by using the response characteristics and the reference sensor equivalent height. A frequency domain reference measurement system is established, including network analyzer, GTEM cell, reference antenna and so on. The equivalent height of the monopole probe antenna with length of 50 mm is measured by this system, and the measured results are compared with those of the time domain method. The test results show that the frequency resolution of the equivalent height measured by the frequency domain reference measurement method is high, and the measurement error and dispersion are small. The proposed frequency domain reference measurement method will be helpful to promote the standardization of UHF sensors and improve the efficiency of GIS partial discharge detection.
【作者单位】： 国网福建省电力有限公司宁德供电公司;
【分类号】：TM855
[Abstract]:In UHF sensor equivalent height time domain measurement method, the frequency resolution and measurement error are a pair of irreconcilable contradictions. If the sampling time is short, the frequency resolution is low, and if the sampling time is long, the measurement error is large. To solve this problem, a frequency domain reference measurement method is proposed. In this method, the sinusoidal voltage waveform of a certain frequency is used as the input signal of the GTEM cell, and then the response of the reference sensor and the sensor to be tested at that frequency is measured. Finally, the equivalent height of the sensor to be tested is calculated by using the response characteristics and the reference sensor equivalent height. A frequency domain reference measurement system is established, including network analyzer, GTEM cell, reference antenna and so on. The equivalent height of the monopole probe antenna with length of 50 mm is measured by this system, and the measured results are compared with those of the time domain method. The test results show that the frequency resolution of the equivalent height measured by the frequency domain reference measurement method is high, and the measurement error and dispersion are small. The proposed frequency domain reference measurement method will be helpful to promote the standardization of UHF sensors and improve the efficiency of GIS partial discharge detection.
【作者单位】： 国网福建省电力有限公司宁德供电公司;
【分类号】：TM855
【参考文献】
相关期刊论文 前10条
1 陈孝信;钱勇;盛戈v，
本文编号：2391983
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