| 基于修正遗忘因子RLS算法的谐波电流检测新方法 |
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| 引用本文： | 刘国海,吕汉闻,陈兆岭,刘慧.基于修正遗忘因子RLS算法的谐波电流检测新方法[J].电工技术学报,2010,25(1). |
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| 作者姓名： | 刘国海 吕汉闻 陈兆岭 刘慧 |
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| 作者单位： | 江苏大学电气信息工程学院,镇江,212013 |
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| 基金项目： | 江苏省高新技术基金(GB2004024);;江苏大学高级人才专项基金(07JDG072);;江苏省镇江市攻关基金(GY2005006)资助项目 |
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| 摘 要： | 为提高电能质量,需对电网谐波进行补偿与抑制,其效果取决于谐波检测的精度和动态响应特性。本文考虑到有源滤波器(APF)的低信噪比特性,提出了一种基于自适应对消技术的修正遗忘因子RLS谐波电流检测算法,该算法从研究权值收敛方式出发,通过设置阈值来判断突变,使得检测过程既有较快的动态响应又有较高的检测精度。最后通过Matlab仿真分析和DSP实验,验证了本文的修正算法既克服了LMS算法初始收敛慢、精确度低,又克服了传统RLS算法的动态响应过慢的不足,证实了该方法是一种非常有效的谐波电流检测方法。
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| 关 键 词： | 谐波检测 自适应滤波 RLS算法 动态响应 |
A New Method for Harmonic Current Detection Based on Self-Adjustable Forgetting Factor RLS Algorithm |
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| Liu Guohai,Lü Hanwen,Chen Zhaoling,Liu Hui.A New Method for Harmonic Current Detection Based on Self-Adjustable Forgetting Factor RLS Algorithm[J].Transactions of China Electrotechnical Society,2010,25(1). |
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| Authors: | Liu Guohai Lü Hanwen Chen Zhaoling Liu Hui |
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| Affiliation: | Jiangsu University Zhenjiang 212013 China |
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| Abstract: | To improve the quality of electric energy,the effects of restraining and compensating for the harmonics of power grid are determined by precision of detection and its dynamic response characteristics.Given the low signal-to-noise ratio of APF,a self-adjustable exponential forgetting factor RLS algorithm of harmonic current detection is introduced,based on adaptive noise canceling technology.Studied the convergence means of weights,the mutation of current can be judged by setting threshold.A fast dynamic res... |
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| Keywords: | Harmonic current detection adaptive filter RLS algorithm dynamic response |
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