| 基于三角自卷积窗的介损角高精度测量算法 |
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| 引用本文： | 温和,滕召胜,王一,吴双双,邬蓉蓉.基于三角自卷积窗的介损角高精度测量算法[J].电工技术学报,2009,24(3). |
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| 作者姓名： | 温和 滕召胜 王一 吴双双 邬蓉蓉 |
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| 作者单位： | 湖南大学电气与信息工程学院,长沙,410082 |
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| 基金项目： | 国家中小企业创新项目 |
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| 摘 要： | 采用快速傅里叶变换(FFT)进行介损角测量时,非同步采样所引起的频谱泄漏造成介损角测量误差较大.为减小这类误差,本文提出了一种基于三角自卷积窗的插值FFT介损角测量方法.三角自卷积窗旁瓣下降快,能有效减少频谱泄漏对介损角测量的影响.采用三角自卷积窗对电压、电流信号进行加权,再运用插值FFT算法求解信号相位参数,可得到较高精度的介损角测量值.对基波频率波动、介损真值变化和谐波注入比例变化等情况下的介损角仿真实验验证了本文算法的准确性和有效性.
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| 关 键 词： | 介损角 三角自卷积窗 快速傅里叶变换 频谱泄漏 |
High Accuracy Dielectric Loss Angle Measurement Algorithm Based on Triangular Self-Convolution Window |
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| Wen He,Teng Zhaosheng,Wang Yi,Wu Shuangshuang,Wu Rongrong.High Accuracy Dielectric Loss Angle Measurement Algorithm Based on Triangular Self-Convolution Window[J].Transactions of China Electrotechnical Society,2009,24(3). |
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| Authors: | Wen He Teng Zhaosheng Wang Yi Wu Shuangshuang Wu Rongrong |
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| Affiliation: | Hunan University Changsha 410082 China |
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| Abstract: | When using FFT for dielectric loss angle(DLA) measurement,the spectral leakage causes errors because of non-synchronization sampling.To reduce those errors,an interpolated FFT algorithm for dielectric loss angle measurement based on triangular self-convolution window(TSCW) is presented in this paper.As the side lobe of the TSCW decays at a very fast rate,errors of DLA measurement caused by spectral leakage can be eliminated by the TSCW.The voltage and current signals were weighted with the TSCW,respectively... |
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| Keywords: | Dielectric loss angle triangular self-convolution window FFT spectrum leakage |
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