| 一种改进的自适应谐波电流检测算法 |
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| 引用本文： | 吴志坚,;赵丽平,;温向宇,;刘根庆. 一种改进的自适应谐波电流检测算法[J]. 变频器世界, 2014, 0(9): 57-60 |
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| 作者姓名： | 吴志坚, 赵丽平, 温向宇, 刘根庆 |
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| 作者单位： | [1]西南交通大学电气工程学院; [2]中机中联工程有限公司 |
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| 摘 要： | 准确、实时地检测出电网中的谐波电流是保证有源电力滤波器(APF)具有良好工作性能的关键。文章提出了一种新的嵌入误差低通滤波器的变步长最小均方(Least—mean—squa re,LMS)自适应算法,该算法以检测后得到的反馈误差信号经低通滤波器与负载电流相邻的两基波周期之差的和作为反馈量来调整步长,有效地提高了系统的动态响应速度以及稳定后的检测精度。仿真实验证明了该算法的有效性和可行性。
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| 关 键 词： | 有源电力滤波器 低通滤波器 变步长 最小均方 |
An Improved Adaptive Harmonic Current Detecting Algorithm |
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| Affiliation: | Wu Zhijian Zhao Liping Wen Xiangyu Liu Genqing |
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| Abstract: | It is the key for the performance of active power filter （APF） that harmonic currentin power system can be detected accurately and real timely. A novel variable step-size leastmean square （LMS） adaptive algorithm embedded error low pass filter is present. The sumof the result of the feedback error through a LPF and error of sampling current values withthe same phase in two adjacent fundamental cycles is used as the feedback amount toadjust step size, so this algorithm can effectively improve the convergence rate and ensurea high detecting precision. The simulation shows the validity and feasibility of the method. |
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| Keywords: | Active power filter Low pass filter Variable step-size Least mean square |
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