| 基于多信号分类法和普罗尼法的间谐波参数估计 |
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| 引用本文： | 石敏,吴正国,尹为民.基于多信号分类法和普罗尼法的间谐波参数估计[J].电网技术,2005,29(15):81-84. |
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| 作者姓名： | 石敏 吴正国 尹为民 |
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| 作者单位： | 海军工程大学,信息与电气学院,湖北省,武汉市,430033;海军工程大学,信息与电气学院,湖北省,武汉市,430033;海军工程大学,信息与电气学院,湖北省,武汉市,430033 |
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| 摘 要： | 提出了一种基于多信号分类法(Multiple Signal Classification,MUSIC)和普罗尼法(Prony)的间谐波参数估计方法,首先通过在MUSIC功率谱曲线中设置阈值来估计信号中的谐波和间谐波频率,然后根据估计出的频率利用Prony法中的最小二乘法来估计其幅值和相位.仿真和实测信号分析结果表明,该间谐波参数估计方法在低噪声水平下可检测到整数次谐波附近的间谐波,且估计出的谐波和间谐波参数精度较高,能满足实际电网信号测试精度的要求.
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| 关 键 词： | 多信号分类法 普罗尼法 谐波 间谐波 电能质量:电力系统 |
| 文章编号： | 1000-3673(2005)15-0081-04 |
| 收稿时间： | 03 16 2005 12:00AM |
| 修稿时间： | 2005年3月16日 |
INTER-HARMONIC PARAMETER ESTIMATION BASED ON MULTI-SIGNAL CLASSIFICATION AND PRONY METHOD |
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| SHI Min,WU Zheng-guo,YIN Wei-min.INTER-HARMONIC PARAMETER ESTIMATION BASED ON MULTI-SIGNAL CLASSIFICATION AND PRONY METHOD[J].Power System Technology,2005,29(15):81-84. |
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| Authors: | SHI Min WU Zheng-guo YIN Wei-min |
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| Abstract: | An inter-harmonic parameter estimation method based on multiple signal classification (MUSIC) and Prony method is proposed. Firstly, the frequency of harmonics and inter-harmonics is estimated by setting threshold in MUSIC power spectrum curve, then the amplitude and phase of harmonics and inter-harmonics is estimated by the estimated frequency and least square method in Prony method. Simulation result and that of measured signal show that using the proposed method the inter-harmonics near the integer harmonics can be detected under low noise level, the estimated integer harmonics and inter-harmonics possess higher accuracy and can meet the need of measuring accuracy of actual power network signals. |
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| Keywords: | Multiple signal classification Prony method Harmonics Inter-harmonics Power quality Power system |
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