|本期目录/Table of Contents|

[1]坚葆林,李许军,姜毅龙.基于加窗频移算法的谐波和间谐波检测方法[J].工业仪表与自动化装置,2019,(03):13-17.[doi:1000-0682(2019)03-0000-00]
 JIAN Baolin,LI Xujun,JIANG Yilong.Harmonic and inter harmonic detection method based on windowed frequency shift algorithm[J].Industrial Instrumentation & Automation,2019,(03):13-17.[doi:1000-0682(2019)03-0000-00]
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基于加窗频移算法的谐波和间谐波检测方法

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

卷:
期数:
2019年03期
页码:
13-17
栏目:
出版日期:
2019-06-15

文章信息/Info

Title:
Harmonic and inter harmonic detection method based on windowed frequency shift algorithm
作者:
坚葆林李许军姜毅龙
甘肃机电职业技术学院,甘肃 天水741001
Author(s):
JIAN BaolinLI XujunJIANG Yilong
Gansu Mechanical & Electrical Vocational and College, Gansu Tianshui 741001,China
关键词:
谐波分析非同步采样加窗插值频移
Keywords:
harmonic analysis asynchronous sampling window interpolation algorithm frequency shift
分类号:
TN86
DOI:
1000-0682(2019)03-0000-00
文献标志码:
A
摘要:
在电力系统谐波和间谐波的检测中,加窗插值算法在一定程度上解决了频谱泄露问题,但在非同步采样下,存在非同步采样误差。该文将频移算法引入到FFT算法检测谐波和间谐波中,该方法首先对原始采样信号离散后进行数据加窗截断,来抑制谐波间频谱泄露,再利用频谱搬移的方法使采样序列的峰值谱线与同步采样的真实谱线重合,以减小或消除同步误差,最后对频移信号进行FFT,计算出各次谐波参数。通过对加窗插值算法和加窗频移算法的实验仿真比较,结果证明了在噪声干扰下加窗频移算法具有更高的分析精度和良好的抗噪性。
Abstract:
In the detection of harmonics and inter-harmonics in power system, the windowed interpolation algorithm solves the problem of spectrum leakage to a certain extent, but there is an asynchronous sampling error in the case of asynchronous sampling. In this paper, the frequency shift algorithm is introduced into the FFT algorithm to detect harmonics and inter harmonics. First of all, the data is cut by windows while the original sampling signal is dispersed by the method to suppress the leakage of harmonic spectrum; then ,to reduce or eliminate the synchronization error, the peak spectrum line of the sampling sequence coincides with the real spectrum of the synchronous sampling by using spectrum shifting method; finally, the frequency shift signal conducts FFT, and the parameters of each harmonic are calculated. The simulation results of the windowed interpolation algorithm and the windowed frequency shift algorithm show that the windowed frequency shift algorithm has higher analysis accuracy and better noise immunity.

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备注/Memo

备注/Memo:
收稿日期:2018-10-16基金项目:2018年甘肃省高等学校科研项目(2018A-186);2016年天水市科技支撑计划项目(天财科[2016]496号) 作者简介:坚葆林(1968),男,甘肃天水人,本科,副教授,主要研究方向为智能控制系统,电子设计。
更新日期/Last Update: 1900-01-01