Benchmark method for selecting FFT windows in harmonic measurements.

IF 2.9 Q2 MULTIDISCIPLINARY SCIENCES

MethodsX Pub Date : 2026-05-25 eCollection Date: 2026-06-01 DOI:10.1016/j.mex.2026.103972

D C Pham, Tuan Ngoc Anh Nguyen

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Abstract

The paper presents a reproducible and measurement-oriented benchmark for selecting existing FFT windows in harmonic measurements under short-duration conditions. Candidate windows are assessed using amplitude-related error, THD deviation, and cross-case consistency. Their overall performance is then summarized through a direct quantitative ranking. Validation is carried out using APS1000-based records under waveform-varying, off-nominal, and noise-contaminated conditions. The main contributions of this work are as follows:•A measurement-oriented performance formulation is established for FFT-window evaluation using harmonic-related error, THD deviation, and cross-case consistency as the main comparison criteria.•A direct quantitative window-selection rule is proposed by combining these criteria into an aggregate score, from which the most suitable window is identified under the considered measurement conditions.•The proposed method is implemented in MATLAB and validated using APS1000-based records, including noise-augmented cases generated in MATLAB, under representative harmonic-measurement conditions.

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谐波测量中FFT窗口选择的基准方法。

本文提出了一个可重复的、面向测量的基准，用于在短持续时间条件下谐波测量中选择现有的FFT窗口。候选窗口使用幅度相关误差、THD偏差和跨案例一致性进行评估。然后通过直接的定量排名来总结他们的整体表现。在波形变化、非标称和噪声污染的条件下，使用基于aps1000的记录进行验证。本工作的主要贡献如下：•建立了以谐波相关误差、THD偏差和跨案例一致性为主要比较标准的fft窗口评估的面向测量的性能公式。•通过将这些标准组合成一个总分，提出了一个直接的定量窗口选择规则，在考虑的测量条件下，从中确定最合适的窗口。•在MATLAB中实现了所提出的方法，并在具有代表性的谐波测量条件下使用基于aps1000的记录（包括MATLAB中生成的噪声增强案例）进行了验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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