| 介损角测量的两种加窗插值DFT算法 |
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| 引用本文： | 徐志钮,律方成,罗运国,李和明. 介损角测量的两种加窗插值DFT算法[J]. 华北电力大学学报(自然科学版), 2006, 33(5): 11-15 |
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| 作者姓名： | 徐志钮 律方成 罗运国 李和明 |
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| 作者单位： | 华北电力大学,电气工程学院,河北,保定,071003;贵阳市乌当供电局,贵州,贵阳,550018 |
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| 摘 要： | 为减少在非同步采样时DFT算法用于介损角测量时存在的误差,将加Blackman-Harris(布莱克曼-哈里斯)窗插值DFT算法和加Hanning(汉宁)窗插值DFT算法用于介损角的测量。分析了两种算法的原理,给出了它们的实现步骤。理论分析和仿真结果表明:在准确获得信号时这两种方法均能准确测定介损角、且受频率波动和谐波变化的影响小,相比之下后者实现容易、计算量较小。
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| 关 键 词： | 介损角 谐波分析法 DFT 布莱克曼-哈里斯窗 汉宁窗 |
| 文章编号： | 1007-2691(2006)05-0011-04 |
| 修稿时间： | 2005-11-22 |
Two windowed interpolation DFT algorithms for measurement of dielectric loss angle |
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| XU Zhi-niu,LU Fang-cheng,LUO Yun-guo,LI He-ming. Two windowed interpolation DFT algorithms for measurement of dielectric loss angle[J]. Journal of North China Electric Power University, 2006, 33(5): 11-15 |
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| Authors: | XU Zhi-niu LU Fang-cheng LUO Yun-guo LI He-ming |
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| Abstract: | To reduce the dielectric loss angle from asynchronous sampling,the Blackman-Harris windowedinterpolated Discrete Fourier Transform(DFT) algorithm and Hanning windowed interpolated DFT algorithm areused.Theprinciples of thesetwo algorithms are analyzed.Therealization procedures are demonstrated.The resultsare influenced little by frequency fluctuation and harmonic variation.Theoretical analysis and simulation resultindicate that this method is valid. |
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| Keywords: | dielectric loss angle harmonic analysismethod DFT Blackman-Harris window Hanningwindow |
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