| 基于变步长LMS的谐波电流检测方法的研究 |
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| 引用本文： | 赵月飞,朱长青,安巧静,严雪飞. 基于变步长LMS的谐波电流检测方法的研究[J]. 军械工程学院学报, 2014, 0(2): 48-52 |
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| 作者姓名： | 赵月飞 朱长青 安巧静 严雪飞 |
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| 作者单位： | [1]军械工程学院无人机工程系 [2]车辆与电气工程系,河北石家庄050003 |
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| 摘 要： | 能否快速准确检测出三相电力系统中谐波电流是决定有源滤波器整体滤波性能的关键.基于瞬时无功功率的谐波电流检测理论,提出了一种改进的自适应滤波器谐波检测算法,通过构造步长因子与误差信号的非线性函数,调整步长参数,使权向量达到最优,在确保稳态误差的前提下,提高了系统的收敛速度.仿真实验验证了该算法的正确性和有效性.
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| 关 键 词： | 谐波检测 瞬时无功功率理论 最小均方算法 低通滤波器 |
Research on the Method of Harmonic Current Detection Based on Variable Step LMS Algorithm |
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| ZHAO Yue-fei,ZHU Chang-qing,AN Qiao-jing,YAN Xue-fei. Research on the Method of Harmonic Current Detection Based on Variable Step LMS Algorithm[J]. Journal of Ordnance Engineering College, 2014, 0(2): 48-52 |
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| Authors: | ZHAO Yue-fei ZHU Chang-qing AN Qiao-jing YAN Xue-fei |
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| Affiliation: | 1. Unmanned Aerial Systems Engineering Department; 2. Vehicle and Electrical Engineering Department,Ordnance Engineering College,Shijiazhuang 050003,China) |
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| Abstract: | Fast and accurate detection of harmonic currents in the three-phase power system is the key element that determines the integrative filtering performance of active power filter.An improved automatic spatial filtering for harmonic detection algorithm based on the instantaneous reactive power for harmonic current detection theory is proposed.By constructing a nonlinear function between the step factor and the error signal,and adj usting the step size parameters,the weight vector is optimized and under the premise of steady-state error performance,the convergence speed of the system is thus improved.Simulation experiments demonstrate that the proposed harmonic current detection algorithm is correct and effective. |
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| Keywords: | harmonic detecting instantaneous reactive power theory least mean square（LMS） algorithm low pass filter（LPF） |
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