| 电网技术 2009, 33(17) 86-90 DOI: ISSN: 1000-3673 CN: 11-2410/TM | |||||||||||||||||||||||||||||||||||||||||||
| 本期目录 | 下期目录 | 过刊浏览 | 高级检索 [打印本页] [关闭] | |||||||||||||||||||||||||||||||||||||||||||
| 电力系统 |
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| 基于最小二乘法和复连续小波变换的电力系统间谐波测量方法 | |||||||||||||||||||||||||||||||||||||||||||
| 曹健,林涛,刘林,张蔓,崔一铂 | |||||||||||||||||||||||||||||||||||||||||||
| 武汉大学 电气工程学院,湖北省 武汉市 430072 | |||||||||||||||||||||||||||||||||||||||||||
| 摘要:
将最小二乘法和复连续小波变换相结合,提出了高精度稳态间谐波测量方法。该方法应用最小二乘法对整个测量频带进行函数拟合,得到了间谐波分量的个数,利用复连续小波变换的带通滤波特性精确测量了各个间谐波分量的频率和幅值。Matlab的仿真结果表明,该方法能够准确测量间谐波分量的频率和幅值,计算量较小。 | |||||||||||||||||||||||||||||||||||||||||||
| 关键词: 电力系统 间谐波 最小二乘法 复连续小波变换 | |||||||||||||||||||||||||||||||||||||||||||
| A Method to Measure Inter-Harmonics in Power System Based on Least Square Method and Complex Continuous Wavelet Transform | |||||||||||||||||||||||||||||||||||||||||||
| CAO Jian ,LIN Tao ,LIU Lin ,ZHANG Man ,CUI Yi-bo | |||||||||||||||||||||||||||||||||||||||||||
| School of Electrical Engineering,Wuhan University,Wuhan 430072,Hubei Province,China | |||||||||||||||||||||||||||||||||||||||||||
| Abstract:
Based on least square method and complex continuous wavelet transform, a high-precision method to measure steady state inter-harmonics in power system is proposed, in which the function fitting of whole measured frequency band is performed to obtain the numbers of inter-harmonic components, then by use of the band-pass filtering feature of complex continuous wavelet transform the frequency and amplitude of each inter-harmonic is precisely measured. Simulation results by Matlab show that using the proposed method the frequencies and amplitudes of inter-harmonics can be precisely measured and the calculation burden is light. | |||||||||||||||||||||||||||||||||||||||||||
| Keywords: power system inter-harmonics least square method complex continuous wavelet transform | |||||||||||||||||||||||||||||||||||||||||||
| 收稿日期 2008-09-11 修回日期 网络版发布日期 2009-09-17 | |||||||||||||||||||||||||||||||||||||||||||
| DOI: | |||||||||||||||||||||||||||||||||||||||||||
| 基金项目:
基金项目:国家自然科学基金资助项目(50677044)。 | |||||||||||||||||||||||||||||||||||||||||||
| 通讯作者: 曹健 | |||||||||||||||||||||||||||||||||||||||||||
| 作者简介: | |||||||||||||||||||||||||||||||||||||||||||
| 作者Email: caojian841017@126.com;caojian841017@163.com | |||||||||||||||||||||||||||||||||||||||||||
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| 参考文献: | |||||||||||||||||||||||||||||||||||||||||||
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