| FFT和小波变换在电力系统谐波测量中的应用 |
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| 引用本文： | 蒋剑波,刘贤兴,王德明. FFT和小波变换在电力系统谐波测量中的应用[J]. 高电压技术, 2005, 31(11): 85-87 |
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| 作者姓名： | 蒋剑波 刘贤兴 王德明 |
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| 作者单位： | 江苏大学电气与信息工程学院,镇江,212013;江苏大学电气与信息工程学院,镇江,212013;江苏大学电气与信息工程学院,镇江,212013 |
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| 摘 要： | 为满足测量要求,改进了FFT算法,并针对其无法调和的时域性和频域性矛盾的缺陷,讨论了小波变换的特性。仿真结果表明,FFT改进后频率、相位、幅值的测量精度提高,而小波变换克服了FFT不能时域局部化的缺点,能在时域、频域内揭示信号特征,较好达到了测量要求。
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| 关 键 词： | 电力系统谐波 FFT 小波变换 |
| 文章编号： | 1003-6520(2005)11-0085-03 |
| 收稿时间： | 2004-11-01 |
| 修稿时间： | 2004-11-01 |
Application of FFT and Wavelet Transform to Measurement of Harmonics in Power System |
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| JIANG Jianbo,LIU Xianxing,WANG Deming. Application of FFT and Wavelet Transform to Measurement of Harmonics in Power System[J]. High Voltage Engineering, 2005, 31(11): 85-87 |
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| Authors: | JIANG Jianbo LIU Xianxing WANG Deming |
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| Affiliation: | School of Electricity and Information Engineering, Jiangsu University Zhenjing, 212013, China |
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| Abstract: | This paper presents the harmonic problem in electric power system,it also discusses two methods of harmonic measurement: FFT and wavelet transform.In order to meet measurement requirement,there is some improvement in FFT.Aimed at the contradiction of frequency domain and time domain in FFT,it discusses the features of wavelet transform,and shows its superiority and prospect. |
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| Keywords: | power system parameters FFT wavelet transform |
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