| 自适应频率跟踪的谐波电流检测方法 |
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| 引用本文： | 夏向阳,罗安.自适应频率跟踪的谐波电流检测方法[J].高电压技术,2008,34(8):1715-1719. |
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| 作者姓名： | 夏向阳 罗安 |
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| 作者单位： | 1. 长沙理工大学电气与信息工程学院,长沙,410077;湖南大学电气与信息工程学院,长沙,410082
2. 湖南大学电气与信息工程学院,长沙,410082 |
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| 摘 要： | 针对电网电压的频率在运行过程中会发生变化,导致谐波电流检测精度下降并直接影响到有源电力滤波器的补偿效果,为此提出了一种基于自适应频率跟踪的谐波电流分频检测方法。该法根据普罗尼谱估法中电导矩阵的频率变化情况,采用LMS算法在线优化从而能独立实时地检测出各相电流中的基波和各次谐波分量,并且直接处理检测结果,具有优良的跟随性能。仿真结果证明了该方法的可行性。
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| 关 键 词： | 谐波电流 频率跟踪 自适应 普罗尼谱估计法 电导矩阵 LMS算法 |
Novel Method for Measuring Harmonic Current Based on Adaptive Frequency-tracking |
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| XIA Xiang-yang,LUO An.Novel Method for Measuring Harmonic Current Based on Adaptive Frequency-tracking[J].High Voltage Engineering,2008,34(8):1715-1719. |
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| Authors: | XIA Xiang-yang LUO An |
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| Affiliation: | 1.College of Electrical Engineering and Information,Changsha University of Science and Technology,Changsha 410077,China;2.College of Electrical Engineering,Hunan University,Changsha 410082,China) |
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| Abstract: | The wide use of nonlinear loads such as power electronic devices in the power distribution systems for DC supply or inverter based applications causes significant power quality degradation in power distribution networks in terms of current/voltage harmonics,power factor and resonance problems.The detection of harmonic current affects the compensation of active power filter.According to the detection performance on power grid,harmonic current frequency division is proposed based on adaptive synchronized tracking and LMS algorithm online optimal Prony spectral estimation of conductance matrix.Simulation results indicate that by this method the APF has a good filtering effect and in-time performance. |
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| Keywords: | harmonic current synchronized tracking adaptive Prony's spectral estimation conductance matrix LMS algorithm |
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