Processing of harmonics and inter-harmonics using adaptive notch filter

M. Mojiri, Masoud Karimi Ghartemani, ALireza Bahshai
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引用次数: 3

Abstract

A method for real-time detection and extraction of individual harmonic and inter-harmonic components in a power signal with potentially time-varying characteristics is presented. The proposed method which is based on the concept of adaptive notch filter (ANF), adaptively decomposes the measured power signal into its constituting components independent of where their frequencies are located. The algorithm provides instantaneous values of the various estimated frequency components in addition to the values of their frequencies, amplitudes and phase angles. The structure and mathematical formulation of the proposed technique including guidelines for its parameter tuning are presented and its performance is studied in a variety of scenarios where the power signal attributes such as fundamental frequency and amplitude undergo variations over time. This study confirms the desirable transient and steady-state performances of the proposed method. As compared with its recently proposed counterpart, the proposed method of this paper obviates the need for using a phase-locked loop (PLL) and hence offers a more simplified structure which makes it more attractive from implementation point of view.
利用自适应陷波滤波器处理谐波和间谐波
提出了一种实时检测和提取具有潜在时变特征的电力信号中单个谐波和间谐波分量的方法。该方法基于自适应陷波滤波器(ANF)的概念,将被测功率信号自适应地分解为各组成分量,而不受其频率位置的影响。该算法提供了各种估计频率分量的瞬时值,以及它们的频率、幅值和相角值。提出了该技术的结构和数学公式,包括参数调谐指南,并研究了其在功率信号属性(如基频和幅值)随时间变化的各种情况下的性能。研究证实了该方法具有良好的瞬态和稳态性能。与最近提出的对应方法相比,本文提出的方法避免了使用锁相环(PLL)的需要,因此提供了更简化的结构,使其从实现的角度更具吸引力。
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