基于频率与相位特性的避雷器电压提取方法研究

发布时间：2018-06-16 15:38

本文选题：避雷器在线监测 + 频率　；参考：《电测与仪表》2016年22期

【摘要】：针对避雷器在线监测装置在复杂接线形式下无法准确获取电压的难题,提出了一种基于电流和各母线电压的频率及相位差偏差均值的避雷器在线监测电压提取方法。本方法通过对电流与电压频率以及电流与电压相位差的等时间间隔偏差的均值进行计算分析并滤波,并采用阈值诊断算法实现对避雷器实际承受电压的提取。实际验证表明,该算法可以有效地剔除各种干扰,可靠区分不同频率的电压信号,从而准确提取避雷器实际承受电压,试验和现场实际运行说明该算法的有效性。
[Abstract]:In order to solve the problem that the lightning arrester on-line monitoring device can not accurately obtain the voltage under the complicated connection form, a method of voltage extraction based on the frequency of current and the voltage of each bus and the mean of phase difference deviation is proposed in this paper. In this method, the mean value of the equal time interval deviation between current and voltage frequency and phase difference between current and voltage is calculated and filtered, and the threshold diagnosis algorithm is used to extract the actual withstand voltage of the arrester. The actual verification shows that the algorithm can effectively eliminate all kinds of interference, reliably distinguish the voltage signals of different frequencies, and extract the actual voltage of arrester accurately. The experiment and field operation show that the algorithm is effective.
【作者单位】：许继电气股份有限公司;
【分类号】：TM862

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