电能表测量中的非正弦谐波信号检测方法

Zhen Gu, Qing He, Lei Zhou, Jingyue Zhang
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引用次数: 1

摘要

随着电子器件的广泛应用,电力领域的谐波污染日益严重,其中非正弦谐波是最重要的影响因素。在非正弦谐波信号的检测过程中,存在频率测量误差较大的问题。对非正弦谐波提取方法进行了优化,去掉了噪声部分。根据供电网络的变化和非正弦谐波污染源的分布,利用电表测量建立信号重构模型,利用小波变换设置信号检测模式。实验结果:本文所设计的非正弦谐波信号检测方法与其他两种检测方法测频的平均相对误差分别为0.0260、0.0316和0.0322,证明所设计的非正弦谐波信号检测方法与电能表计量方法相结合后,性能得到了提高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Non-sinusoidal harmonic signal detection method for energy meter measurement
With the wide application of electronic devices, harmonic pollution in power field is becoming more and more serious, non-sinusoidal harmonics is the most important influencing factor. In the process of detecting non-sinusoidal harmonic signal, there exists the problem of relatively large error of frequency measurement. The non-sinusoidal harmonic extraction method was optimized to remove the noise part. According to the change of power supply network and the distribution of non-sinusoidal harmonic pollution sources, the signal reconstruction model was constructed by using electricity meter measurement, and the signal detection mode was set by using wavelet transform. Experimental results: The mean relative errors of frequency measurement between the non-sinusoidal harmonic signal detection method in this paper and the other two detection methods are respectively 0.0260, 0.0316 and 0.0322, which proves that the performance of the non-sinusoidal harmonic signal detection method designed has been improved after combining with the metering method of electricity meter.
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