应用三谱线插值FFT分析电力谐波的改进算法
分析了加窗三谱线插值FFT算法的原理。针对算法开方运算量大、响应速度慢的不足，分析了窗函数主瓣内谱线的相位特性，推导出在忽略谐波间泄漏影响的情况下窗函数主瓣内任意相邻两根谱线相位差等于π的规律。在此基础上提出了一种改进三谱线插值修正算法，该算法在不影响精度的前提下可将插值过程所需的求幅值运算量减少为常规算法的1/3。仿真和实验结果表明，改进算法有效地减少了插值过程的计算量，提高了算法响应速度，同时仍然具有较高的计算精度，适用于电力谐波的分析测量。...
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| Published in | 电力系统保护与控制 Vol. 43; no. 2; pp. 33 - 39 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
河南工程学院机械工程学院,河南 新郑,451191%华北水利水电大学电力学院,河南 郑州,450011
2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-3415 |
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| Abstract | 分析了加窗三谱线插值FFT算法的原理。针对算法开方运算量大、响应速度慢的不足，分析了窗函数主瓣内谱线的相位特性，推导出在忽略谐波间泄漏影响的情况下窗函数主瓣内任意相邻两根谱线相位差等于π的规律。在此基础上提出了一种改进三谱线插值修正算法，该算法在不影响精度的前提下可将插值过程所需的求幅值运算量减少为常规算法的1/3。仿真和实验结果表明，改进算法有效地减少了插值过程的计算量，提高了算法响应速度，同时仍然具有较高的计算精度，适用于电力谐波的分析测量。 |
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| AbstractList | 分析了加窗三谱线插值FFT算法的原理。针对算法开方运算量大、响应速度慢的不足，分析了窗函数主瓣内谱线的相位特性，推导出在忽略谐波间泄漏影响的情况下窗函数主瓣内任意相邻两根谱线相位差等于π的规律。在此基础上提出了一种改进三谱线插值修正算法，该算法在不影响精度的前提下可将插值过程所需的求幅值运算量减少为常规算法的1/3。仿真和实验结果表明，改进算法有效地减少了插值过程的计算量，提高了算法响应速度，同时仍然具有较高的计算精度，适用于电力谐波的分析测量。 TM930.9; 分析了加窗三谱线插值FFT算法的原理。针对算法开方运算量大、响应速度慢的不足，分析了窗函数主瓣内谱线的相位特性，推导出在忽略谐波间泄漏影响的情况下窗函数主瓣内任意相邻两根谱线相位差等于π的规律。在此基础上提出了一种改进三谱线插值修正算法，该算法在不影响精度的前提下可将插值过程所需的求幅值运算量减少为常规算法的1/3。仿真和实验结果表明，改进算法有效地减少了插值过程的计算量，提高了算法响应速度，同时仍然具有较高的计算精度，适用于电力谐波的分析测量。 |
| Abstract_FL | The principle of triple-spectrum-line interpolation algorithm based on window FFT is analyzed firstly. Aimed at its shortcomings of large computing capacity and much time consumption, frequency spectrum in main lobe of window function is analyzed, and a rule that the phase difference of any two adjacent spectrum lines in main lobe of window isπis derived. Based on the rule, an improved algorithm for triple-spectrum-line interpolation FFT is presented, which can reduce amount of solving amplitude to one-third of the normal one. Simulation and experiment shows that the improved algorithm is of high accuracy and small amount of calculation, and it is suitable for power harmonic analysis. |
| Author | 蔡晓峰 张鸿博 鲁改凤 |
| AuthorAffiliation | 河南工程学院机械工程学院,河南 新郑451191 华北水利水电大学电力学院,河南 郑州450011 |
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| Author_FL | LU Gaifeng ZHANG Hongbo CAI Xiaofeng |
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| ClassificationCodes | TM930.9 |
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| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| DocumentTitleAlternate | Improvement algorithm for harmonic analysis of power system using triple-spectrum-line interpolation algorithm based on window FFT |
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| EndPage | 39 |
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| Keywords | 快速傅立叶变换 三谱线 window functions interpolation FFT 插值 谐波测量 triple-spectrum-line 窗函数 harmonic analysis |
| Language | Chinese |
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| Notes | CAI Xiaofeng, ZHANG Hongbo, LU Gaifeng （1. Department of Mechanic-Electronic Engineering, Henan Institute of Engineering, Xinzheng 451191, China; 2. Schooi of Electric Power, North China University of Water Conservancy and Electric Power, Zhengzhou 450011, China） 41-1401/TM harmonic analysis;FFT;window functions;triple-spectrum-line;interpolation The principle of triple-spectrum-line interpolation algorithm based on window FFT is analyzed firstly. Aimed at its shortcomings of large computing capacity and much time consumption, frequency spectrum in main lobe of window function is analyzed, and a rule that the phase difference of any two adjacent spectrum lines in main lobe of window isπis derived. Based on the rule, an improved algorithm for triple-spectrum-line interpolation FFT is presented, which can reduce amount of solving amplitude to one-third of the normal one. Simulation and experiment shows that the improved algorithm is of high accuracy and small amount of calculation, and it is suitable for power har |
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| PublicationTitle | 电力系统保护与控制 |
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| PublicationTitle_FL | Power System Protection and Control |
| PublicationYear | 2015 |
| Publisher | 河南工程学院机械工程学院,河南 新郑,451191%华北水利水电大学电力学院,河南 郑州,450011 |
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| Snippet | 分析了加窗三谱线插值FFT算法的原理。针对算法开方运算量大、响应速度慢的不足，分析了窗函数主瓣内谱线的相位特性，推导出在忽略谐波间泄漏影响的情况下窗函数主瓣内任意相... TM930.9; 分析了加窗三谱线插值FFT算法的原理。针对算法开方运算量大、响应速度慢的不足，分析了窗函数主瓣内谱线的相位特性，推导出在忽略谐波间泄漏影响的情况下窗函数主... |
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| SubjectTerms | 三谱线 快速傅立叶变换 插值 窗函数 谐波测量 |
| Title | 应用三谱线插值FFT分析电力谐波的改进算法 |
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