基于谱线曲线拟合的间谐波测量算法

Jiaxian Li, Hao Liu, T. Bi, Shicong Ma
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引用次数: 3

摘要

这些电力电子器件产生的间谐波导致次同步振荡(SSO)更频繁地发生。现有的许多测量方法都不适合在电力电子设备较多的环境中进行间谐波测量。本文提出了一种基于FFT和曲线拟合的快速、精确的次/超同步谐波估计算法。首先采用加窗技术来减少光谱泄漏。其次,采用零填充来缓解尖桩栅栏效应。最后,采用谱线曲线拟合进行互谐分析。仿真和实验结果表明,该算法能够实现准确、实时、抗噪声的间谐波估计。实验结果验证了该算法的准确性和有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A spectral line curve fitting based algorithm for inter-harmonics measurement
The inter-harmonics produced by those power electronic devices leads to a more frequent occurrence of sub-synchronous oscillations (SSO). Many existing measuring methods are not suitable for the inter-harmonics measurement in the environment where plenty of power electronic devices exist. In this paper, a fast and precise measuring algorithm based on FFT and curve fitting is proposed to estimate the sub/super-synchronous harmonics. The windowing technique is used to reduce the spectral leakage firstly. Secondly, zero-padding is adopted to mitigate the picket-fence effect. Lastly, spectrum line curve fitting is applied to perform the inter-harmonic analysis. The simulation and experiment results indicate that the proposed algorithm is able to perform an accurate, real-time and anti-noise inter-harmonics estimation. Experiment results verify the accuracy and effectiveness of the proposed algorithm.
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