一种基于频率自增的高精度谐波分析方法
A high accuracy harmonic analysis method based on auto-increasing frequency
投稿时间:2019-12-25  修订日期:2019-12-25
DOI:
中文关键词: 频率自增  四谱线插值  循环变量间隔  谐波分析  高精度
英文关键词: Auto-increasing frequency  Four-spectrum-lines interpolation  Interval of cyclic variables  Harmonic analysis  High accuracy
基金项目:
作者单位E-mail
张俊敏 中南民族大学计算机科学学院 173902815@qq.com 
郑植 中南民族大学计算机科学学院 1143633753@qq.com 
田贇祥 中国科学院等离子体物理研究所  
卢晶 中国科学院等离子体物理研究所  
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中文摘要:
      利用加窗插值FFT算法分析复杂电网信号时,往往无法确定其谐波成分,按基波的倍数次寻找各次谐波,很有可能会漏掉某一频点。为了满足电网谐波分析的完整性,提出了一种基于频率自增的高精度谐波分析方法。在四谱线插值算法的基础上,设定频率以合适的循环变量间隔增长,给出了计算公式。针对输入信号对其测量精度进行了仿真实验分析,研究了基波频率波动对其测量准确度的影响,并对EAST实验数据进行了分析。仿真和实验结果验证该谐波检测方法的可行性和高精度性。
英文摘要:
      When using windowed interpolation FFT algorithm to analyze complex power grid signals, it is often impossible to determine the harmonic components, and it is possible to miss a certain frequency point by searching for each harmonic according to the times of fundamental. In order to satisfy the integrity of harmonic analysis, a high precision harmonic analysis method based on auto-increasing frequency is proposed. Based on the four-spectrum-lines interpolation algorithm, the frequency is set to increase with appropriate interval of cyclic variables, and the calculation formula is given. Based on the simulation experiment, the influence of fundamental frequency fluctuation on the measurement accuracy is studied, and the experimental data of EAST is analyzed. Simulation and experimental results confirmed that the feasibility and high accuracy of the method.
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