| 用小波分析提取电压闪变的幅值调制信号 |
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| 引用本文： | 堵俊,邵振国,郭晓丽,吴晓,包志华.用小波分析提取电压闪变的幅值调制信号[J].电力系统及其自动化学报,2006,18(3):34-37. |
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| 作者姓名： | 堵俊 邵振国 郭晓丽 吴晓 包志华 |
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| 作者单位： | 南通大学电气工程学院,南通,226001;南通大学电气工程学院,南通,226001;南通大学电气工程学院,南通,226001;南通大学电气工程学院,南通,226001;南通大学电气工程学院,南通,226001 |
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| 基金项目： | 江苏省教育厅自然科学研究项目（03KJB470104）;南通大学自然科学研究项目《电力系统电能质量在线评估系统的研制》 |
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| 摘 要： | 正确评价闪变污染程度并进行有效治理需要计算电压闪变的幅值调制信号。传统的检测法用FFT算法分析稳态调幅波,不能分析幅值时变的闪变信号。小波变换能够提取时变的调幅波,但已有的方法需要(拟)同步信号,在电压信号存在其它波形干扰时会引入较大误差。文中提出了一种直接利用采样电压信号,基于周期小波变换的闪变电压包络线检测方法。经过仿真算例验证,这种方法误差小、适应性强,能满足工程应用要求。
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| 关 键 词： | 电压闪变 小波分析 电能质量 信号分析 检测 |
| 文章编号： | 1003-8930（2006）03-0034-04 |
| 收稿时间： | 2005-05-19 |
| 修稿时间： | 2005-08-18 |
Tracking the Envelope of Voltage Flicker Using Wavelet Analysis |
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| DU Jun,SHAO Zhen-guo,GUO Xiao-li,WU Xiao,BAO Zhi-hua.Tracking the Envelope of Voltage Flicker Using Wavelet Analysis[J].Proceedings of the CSU-EPSA,2006,18(3):34-37. |
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| Authors: | DU Jun SHAO Zhen-guo GUO Xiao-li WU Xiao BAO Zhi-hua |
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| Affiliation: | School of Electrical Engineering, Nantong University, Nantong 226001, China |
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| Abstract: | The accuracy of tracking the envelope of voltage signal has a great effect on the flicker measurement and the efficiency of voltage flicker mitigation.Conventional Fourier transform based detection method,such as squared method suggested by IEC,can't extract the time-varying envelope of voltage flicker.Being suitable for analyzing the non-steady voltage envelope,newer wavelet based algorithm will bring errors if either imprecise synchronizing signal or simulating synchronizing signal is used in the condition of a bit of transients presented.A new method is proposed in this paper which demodulates the voltage signal directly and extracts the envelope of voltage flicker using wavelet transform.Its validity and applicability are evaluated with examples of different cases. |
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| Keywords: | voltage flicker wavelet transform power quality signal analysis detection |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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