| 基于谐波小波变换的电力系统谐波检测研究 |
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| 引用本文： | 杨润田,党国营,胡智慧. 基于谐波小波变换的电力系统谐波检测研究[J]. 四川电力技术, 2010, 33(4): 39-42 |
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| 作者姓名： | 杨润田 党国营 胡智慧 |
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| 作者单位： | 1. 陕西渭南供电局,陕西,渭南,714000
2. 浙江绍兴供电局,浙江,绍兴,311800 |
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| 摘 要： | 准确的谐波分析对电力系统稳定具有重要意义。为克服传统小波分析方法的缺点,提出将谐波小波用于噪声环境下谐波分析。首先对谐波小波进行加窗处理以减少频谱Gibbs现象,然后运用谐波小波方法实现各谐波分量的分离,计算出各谐波分量的瞬时幅值和频率,并对结果进行最小二乘拟合以提高精度。大量的仿真结果表明谐波小波方法在电力谐波分析中是准确有效的。
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| 关 键 词： | 谐波小波 最小二乘拟合 电力系统谐波 波形变换 |
Research on Application of Harmonic Wavelet Transform to Harmonic Analysis in Power System |
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| Yang Runtian,Dang Guoying,Hu Zhihui. Research on Application of Harmonic Wavelet Transform to Harmonic Analysis in Power System[J]. Sichuan Electric Power Technology, 2010, 33(4): 39-42 |
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| Authors: | Yang Runtian Dang Guoying Hu Zhihui |
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| Abstract: | The accurate analysis of harmonic is of great significance for the power system stability.Harmonic wavelet transform（HWT） is adopted to analyze harmonic in order to overcome the shortcomings of traditional wavelet analysis method.Firstly,in order to reduce the impact of Gibbs phenomenon in spectrum,a step of adding window process is employed.And then,the harmonic signal is decomposed by harmonic wavelet transform,and the instantaneous amplitude and frequency of harmonic components are identified.Furthermore,in order to increase the accuracy,the amplitude and frequency of each harmonic component are calculated by least squares fitting method.Numerical results show that the presented approach is an effective one with high accuracy. |
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| Keywords: | harmonic wavelet least squares fitting power system harmonic waveform transform |
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