| 基于快速提升小波变换的谐波实时检测新方法 |
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| 引用本文： | 刘慧,刘国海,沈跃. 基于快速提升小波变换的谐波实时检测新方法[J]. 江苏大学学报(自然科学版), 2009, 30(3) |
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| 作者姓名： | 刘慧 刘国海 沈跃 |
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| 作者单位： | 江苏大学,电气信息工程学院,江苏,镇江,212013;江苏大学,电气信息工程学院,江苏,镇江,212013;江苏大学,电气信息工程学院,江苏,镇江,212013 |
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| 基金项目： | 教育部高等学校博士学科点专项科研基金，江苏省攻关项目，江苏大学高级人才科研启动基金 |
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| 摘 要： | 提出一种基于提升小波变换的有源电力滤波器谐波实时检测方法.以经典Daubechies小波为谐波检测基函数,利用欧拉算法因子化分解得到其第二代小波提升步骤;通过当前采样值与历史采样值构造改进型数据帧实现小波实时算法,并采用周期延拓处理数据帧边界.搭建dSPACE试验平台,自编Simulink/Embedded Matlab Function函数实现检测算法,将Simulink/RTW和dSPACE/RTI生成C代码载入实时硬件系统进行分析.试验结果表明:该方法能准确实时地分离出电网稳态谐波分量,暂态跟踪调整时间少于一个周波;较第一代Mallet小波算法加速近一半;改进的实时数据帧构造方法硬件实现更加快速.
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| 关 键 词： | 电力系统 有源滤波 谐波检测 实时 提升小波 周期延拓 |
A novel real-time harmonic detection method using fast lifting wavelet transform |
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| Liu Hui,Liu Guohai,Shen Yue. A novel real-time harmonic detection method using fast lifting wavelet transform[J]. Journal of Jiangsu University:Natural Science Edition, 2009, 30(3) |
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| Authors: | Liu Hui Liu Guohai Shen Yue |
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| Affiliation: | School of Electrical and Information Engineering;Jiangsu University;Zhenjiang;Jiangsu 212013;China |
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| Abstract: | A new real-time harmonic detection method for active power filters based on lifting wavelet transform was proposed.A classical Daubechies wavelet primary function was factored into lifting steps of second generation wavelet using Euclidean algorithm for harmonic analysis.The improved real-time frame operation algorithm can avoid the reconstruction of data frames by joining the current sample values with history data in succession.Period extension method was adopted in lifting wavelet process and resolving d... |
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| Keywords: | electric power systems active power filters harmonic analysis real-time lifting wavelet transform period extension |
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