| 五项最大旁瓣衰减窗插值电力谐波分析 |
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| 引用本文： | 宋树平,马宏忠,徐刚,王付宗,王洁. 五项最大旁瓣衰减窗插值电力谐波分析[J]. 电力系统自动化, 2015, 39(22): 83-89 |
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| 作者姓名： | 宋树平 马宏忠 徐刚 王付宗 王洁 |
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| 作者单位： | 河海大学能源与电气学院, 江苏省南京市 211100,河海大学能源与电气学院, 江苏省南京市 211100,江苏省电力公司检修分公司淮安分部, 江苏省淮安市 223022,东南大学建筑设计研究院有限公司, 江苏省南京市 210096,南京苏逸实业有限公司, 江苏省南京市 210009 |
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| 基金项目： | 国家自然科学基金资助项目(51177039) |
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| 摘 要： | 提出一种简单的加窗插值快速傅里叶变换方法,用于非同步采样下的电力谐波分析。首先,分析了五项最大旁瓣衰减窗的时域、频域特性;然后,给出基于五项最大旁瓣衰减窗的插值方法,并推导了谐波幅值、初始相位和频率的计算公式;最后,分别用仿真分析、实验测试对所述方法的有效性进行验证。研究表明,五项最大旁瓣衰减窗具有较好的旁瓣特性,能够充分抑制频谱泄漏;基于五项最大旁瓣衰减窗的插值算法,插值公式简单、有解析解、谐波分析精度高、计算量小,易于在嵌入式系统中实现。
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| 关 键 词： | 频谱泄漏 插值 快速傅里叶变换 谐波分析 电力系统 |
| 收稿时间： | 2014-12-30 |
| 修稿时间： | 2015-07-26 |
Power Harmonic Analysis Based on 5-term Maximum-sidelobe-decay Window Interpolation |
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| SONG Shuping,MA Hongzhong,XU Gang,WANG Fuzong and WANG Jie. Power Harmonic Analysis Based on 5-term Maximum-sidelobe-decay Window Interpolation[J]. Automation of Electric Power Systems, 2015, 39(22): 83-89 |
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| Authors: | SONG Shuping MA Hongzhong XU Gang WANG Fuzong WANG Jie |
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| Affiliation: | College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China,College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China,State Grid Jiangsu Electric Power Maintenance Branch Company, Huaian 223022, China,Architects & Engineers Co. Ltd. of Southeast University, Nanjing 210096, China and Su Yi Industrial Co. Ltd., Nanjing 210009, China |
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| Abstract: | A simple windowed interpolation fast Fourier transform (FFT) algorithm is proposed for power harmonic analysis under asynchronous sampling. The time and frequency domain characteristics of 5-term maximum-sidelobe-decay (MSD) window are analyzed first. Then an interpolation approach based on 5-term MSD window FFT is given and the formula of harmonics amplitude, initial phase and frequency are deduced. The approach presented is finally verified by simulations and experimental testing. Results show that the 5-term MSD window has satisfactory sidelobe characteristics for fully suppressing spectral leakage and the 5-term MSD window based interpolation method is easy to realize in embedded systems for its simple interpolated correction formula, closed form expression, highly accurate power harmonic analysis, and low computational burden. This work is supported by National Natural Science Foundation of China (No. 51177039). |
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| Keywords: | spectral leakage interpolation fast Fourier transform (FFT) harmonic analysis power systems |
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