特高频传感器等效高度的频域参考测量方法-电网技术.pdf

41 卷 4 期 电 网 技 术 Vol. 4 1 No. 4 20 17 年4 月 Power System Technology Apr. 20 17 文章编号：1000-3673 （20 17）04-1364-05 中图分类号：TM 835 文献标志码：A 学科代码：470 40 特高频传感器等效高度的频域参考测量方法 陈玉树 （国网福建省电力有限公司宁德供电公司，福建省 宁德市 350000 ） Frequency Domain Reference Method for Measuring Equivalent Height of Ultra-High-Frequency Sensor CHEN Yushu (State Grid Fuji an Ningde Electric Power Supply Company, Ningde 350000, Fuj ian Province, China) ABSTRACT: In time domain method used for measuring 等效高度频率分辨率高、测量误差和分散性小。提出的频域 equivalent height of ultra-high-frequency senor, requirements 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 of high frequency resolution and low measurement error cant GIS 局部放电检测效率。 be met at the same time. Shorter sampling time inevitably leads 关键词：局部放电；特高频；传感器；等效高度；频域；参 lower frequency resolution, and longer sampling time would 考测量法 cause larger errors of equivalent heights. To solve this problem, DOI 10.13335/j.1000-3673.pst.2016.1297 frequency domain reference method is suggested. In this method, sine wave signals in some frequency are inj ected into 0 引言 GTEM cell, and then outputs of reference sensor and the sensor under test are recorded. Lastly, equivalent height of the sensor 特高频检测方法适用于GIS 局部放电带电检测 under test is calculated using these outputs and equivalent 和在线监测，在现场应用中发现了众多GIS 绝缘缺 height of reference sensor. Frequency domain reference 陷，为保障 GIS 设备安全可靠运行发挥了重要作 measurement system is set up, including network analyzer, [1-7] 用 。特高频传感器是局部放电检测系统中