[1]邹左明,刘丛志.基于FFT和DWT的柴油发电机电网谐波分析[J].机械与电子,2016,(06):16-20,25.
 ZOU Zuoming,LIU Congzhi.Harmonic Analysis of the Diesel Generator Power System Based on FFT and DWT[J].Machinery & Electronics,2016,(06):16-20,25.
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基于FFT和DWT的柴油发电机电网谐波分析
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《机械与电子》[ISSN:1001-2257/CN:52-1052/TH]

卷:
期数:
2016年06期
页码:
16-20,25
栏目:
设计与研究
出版日期:
2016-06-25

文章信息/Info

Title:
Harmonic Analysis of the Diesel Generator Power System Based on FFT and DWT
作者:
邹左明1刘丛志2
(1.四川信息职业技术学院机电工程系,四川 广元 628017 ;2.西南交通大学机械工程学院四川 成都,610031)
Author(s):
ZOU Zuoming1LIU Congzhi2
(1.Department of Mechanical and Electrical Engineering , Sichuan Vocational College of Information Technology, Guangyuan 628017,China;2.School of Mechanical Engineering, Southwest Jiaotong University,Chengdu 610031,China)
关键词:
柴油发电机电网谐波分析傅里叶变换小波变换
Keywords:
diesel generator power system harmonics analysis fourier transform wavelet transform
分类号:
U226.8
文献标志码:
A
摘要:
稳态谐波信号的分析常采用快速傅里叶变换(FFT),但对于暂态信号的误差较大。离散小波变换(DWT)特别适合于非稳态信号的分析,但对于稳态谐波的分析效果没有FFT好。结合柴油发电机电网的特点,提出了基于FFT和DWT的联合分析方法。首先通过DWT将柴油发电机电网谐波信号分解为低频稳态部分和高频暂态部分,再采用FFT和db4小波对两部分信号分量依次进行分析。利用Matlab软件仿真,分析算法获得了较好的预期效果,说明联合分析策略在柴油发电机电网谐波分析中具有一定的可行性和实用性。
Abstract:
The fast Fourier transform (FFT) is mainly applied to the analysis of the steady-state harmonic signals but its errors are great in the analysis of transient signals. The discrete wavelet transform (DWT) is particularly suitable for the analysis of non-stable signals, but it shows lower analytical effect than FFT in analyzing the steady-state harmonic signals. The paper presents an analyzing strategy of power system harmonics based on FFT and DWT using db4 according to the characteristics of the diesel generator power grid. First of all, the diesel generator power system harmonic signals are decomposed into low frequency part and high frequency part through the DWT, which are then analyzed by FFT and db4 wavelet respectively. The analysis algorithm achieves the desired results by MATLAB simulation, indicating that the combined analysis strategy has certain feasibility and practicality in the harmonic analysis for the diesel generator grid.

参考文献/References:

[1]王兆安, 杨君, 刘进军,等. 谐波抑制和无功功率补偿[M]. 北京:机械工业出版社,2005.
[2]郭浩, 祝龙记, 彭博,等. 基于 LabVIEW 的发电机组振动与噪声监测系统设计[J]. 煤矿机械, 2013, 34(007): 166-167.
[3]任祖华.基于窗函数的FFT谐波参数估计算法[J].电测与仪表,2010,47(5):8-12.
[4]黄纯,江亚群.谐波分析的加窗插值改进算法[J].中国电机工程学报,2005,25(15):26-32.
[5]王刘旺, 黄建才, 孙建新,等. 基于加汉宁窗的FFT高精度谐波检测改进算法[J]. 电力系统保护与控制, 2012, 40(24): 28-33.
[6]牛胜锁, 梁志瑞, 张建华,等. 基于三谱线插值FFT 的电力谐波分析算法[J]. 中国电机工程学报, 2012, 32(16): 130-136.
[7]Julio Barros, Ramon I Diego, Matilde de Apraiz. A discussion of new requirements for measurement of harmonic distortion in modern power supply systems [J].IEEE Transactions on Instrumentation and Measurement, 2013, 62(8):2129-2139.
[8]周龙华,付青,余世杰,等. 基于小波变换的谐波检测技术22(01):80-85.
[9]马慧, 张开如, 李忠政,等. 基于小波分析的发电机定子绕组两相短路故障检测[J]. 煤矿机械, 2015, 36(6): 316-318.
[10]曾瑞江,杨震斌,柳慧超.基于小波变换的电力系统谐波检测方法研究[J].电力系统保护与控制,2012,40(15):35-39.
[11]张德丰. MATLAB小波分析[M]. 北京: 机械工业出版社, 2012.
[12]柴保明, 李文选, 苏茹茹,等. 基于小波包重构与分解的发电机组故障分析[J]. 煤矿机械, 2012, 33(4): 273-275.
[13]IEC Standard 61000-4-7, General Guide on Harmonics and Interharmonics Measurements for Power Supply Systems and Equipment Connected Thereto [S], 2002.
[14]Yanli Liu,Baochen Jiang, Chengyou Wang,ect. Power system harmonic analysis based on windowed FFT and wavelet transform[C]// IEEE Computer Society Press,2011:225-228.
[15]朱翔,解大,高强,等.基于 FFT和 db20小波变换的电力系统谐波联合分析策略[J].电力系统保护与控制,2012,40(12):62-66.
[16]Tomasz Tarasiuk.Hybrid wavelet-fourier method for harmonics and harmonic subgroups measurement -case study[J].IEEE Trans. on Power Delivery, 2007,22(1):4-17.

备注/Memo

备注/Memo:
收稿日期:2016-04-06
基金项目:四川省应用基础研究(重大前沿)项目(2015JY0281);四川省重大科技成果转化专项(2015CC0003);四川省国际科技合作与交流研究计划项目(2015HH0062);西南交通大学研究生创新实验实践项目(YC201502109)
作者简介:邹左明(1978-),男,四川广安人,硕士、讲师,研究方向为机械电子工程;刘丛志(1989-),硕士,研究方向为汽车与发动机控制、信号处理与故障诊断技术。
更新日期/Last Update: 2016-06-25