| 基于畸变波形同步分层估计谐波阻抗的探讨 |
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| 引用本文： | 张安安,杨洪耕.基于畸变波形同步分层估计谐波阻抗的探讨[J].电力系统自动化,2003,27(9):41-44. |
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| 作者姓名： | 张安安 杨洪耕 |
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| 作者单位： | 四川大学电气信息学院,四川省成都市,610065 |
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| 基金项目： | 国家自然科学基金资助项目 (5 0 1770 2 1)，四川省应用基础研究基金资助项目 (0 1GY0 5 1- 4 1) |
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| 摘 要： | 由于Fourier变换缺乏时域局部化的能力，影响了直接利用Fourier变换通过电压、电流波形波动量估计系统谐波阻抗的准确度。文中利用小波变换时—频局部化分析的特点，运用复小波对信号同步分层，分层后信号突出了电压、电流的波动情况，再应用“波动法”估计谐波阻抗。实验电路和实测数据的分析结果验证了该方法的有效性。
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| 关 键 词： | 小波分析 电力系统 谐波阻抗 Fourier变换 波动量 畸变波形同步分层估计 |
| 收稿时间： | 1/1/1900 12:00:00 AM |
| 修稿时间： | 1/1/1900 12:00:00 AM |
DISCUSSION ON ASSESSING HARMONIC IMPEDANCE BY SYNCHRONOUSLY LAYERED DISTORTION WAVES |
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| Zhang An''''an,Yang Honggeng.DISCUSSION ON ASSESSING HARMONIC IMPEDANCE BY SYNCHRONOUSLY LAYERED DISTORTION WAVES[J].Automation of Electric Power Systems,2003,27(9):41-44. |
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| Authors: | Zhang An'an Yang Honggeng |
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| Abstract: | The veracity of assessing harmonic impedance by fluctuations of voltage and current waveform merely by use of the Fourier transform is reduced, for the Fourier transform lacks the ability to perform a time frequency analysis. This paper presents a method that is based on synchronously layered distortion waveforms with complex wavelet transform, which can make the harmonic fluctuations more distinct, before assessing the harmonic impedance with the fluctuations method. The results of application both in an experimental circuit and in a practical case have shown that this method is effective. This project is supported by National Natural Science Foundation of China (No. 50177021) and Basic Application Research Foundation of Sichuan Province (No. 01GY051 41). |
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| Keywords: | harmonic impedance complex wavelet fluctuation quantities non invasive |
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