| 电力系统基波频率的高精度测量新方法 |
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| 引用本文： | 李玲,金国彬,谢卫才.电力系统基波频率的高精度测量新方法[J].湖南工程学院学报(自然科学版),2009,19(2). |
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| 作者姓名： | 李玲 金国彬 谢卫才 |
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| 作者单位： | 湖南工程学院电气信息学院,湘潭,411101 |
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| 摘 要： | 针对电力系统基波频率测量的现状,提出一种高精度的频率测量新方法.该方法通过计算待测电信号的相关系数自适应地确定傅立叶变换的窗长,从而实现无频谱泄漏的自适应窗长傅立叶变换,即实现电力系统基频的高精度测量.针对有谐波、间谐波、噪声等复杂背景下的基频检测进行仿真分析,仿真结果表明:该方法检测精度高,抗噪声能力强,且计算量小,易于工程实现.
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| 关 键 词： | 电力系统 频率测量 自适应窗长DFT 同步采样 |
A New High-accuracy Method on Fundamental Frequency Measurement for Power System |
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| LI Ling,JIN Guo-bin,XIE Wei-cai.A New High-accuracy Method on Fundamental Frequency Measurement for Power System[J].Journal of Hunan Institute of Engineering(Natural Science Edition),2009,19(2). |
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| Authors: | LI Ling JIN Guo-bin XIE Wei-cai |
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| Institution: | LI Ling,JIN Guo-bin,XIE Wei-cai (College of Elect,and Information,Hunan Institute of Engineering,Xiangtan 411104,China) |
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| Abstract: | A novel method of frequency measurement is proposed in this paper with the research on fundamental frequency measurement in power system.Independent on spectral leakage and high accurate measurement can be realized by adaptive window width DFT(AWDFT).The window width is showed by calculating correlation of electrical signals to be measured.It is revealed that fundamental frequency is detected accurately in harmonics,interharmonics,noise and frequency fluctuations by simulation results.This method is simple ... |
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| Keywords: | power system frequency measurement AWDFT synchronous sample |
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