| 加窗相位差校正算法在电网频率测量中的应用 |
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| 引用本文： | 杨力森,范李平.加窗相位差校正算法在电网频率测量中的应用[J].电网与水力发电进展,2009,25(7):34-38. |
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| 作者姓名： | 杨力森 范李平 |
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| 作者单位： | 三峡大学 电气信息学院，湖北，宜昌 44300;三峡大学 电气信息学院，湖北，宜昌 44300 |
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| 摘 要： | 电力系统的频率时刻处于波动状态，采样不可能做到完全同步，基于离散傅立叶变换（DFT）的算法不可避免的存在频谱泄露和栅栏效应．导致测量的精度无法满足电力系统参数的精度要求。介绍了一种改进的DFT频率测量算法，通过选择合适的窗函数和相位差校正的方法来提高频率测量的精度。仿真分析表明，该算法达到了电网频率测量的标准，具有一定的可行性和有效性。
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| 关 键 词： | 离散傅立叶变换 窗函数 相位差校正 电网频率 |
Application of Windowing Phase Difference Correcting Algorithm in Frequency Measurements of Electric Network Measurements |
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| Authors: | YANG Li-sen and FAN Li-ping |
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| Affiliation: | The College of Electronics and Information Engineering,China Three Georges University, Yichang 443002, Hubei Province, China;The College of Electronics and Information Engineering,China Three Georges University, Yichang 443002, Hubei Province, China |
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| Abstract: | The frequency of the power system is always fluctuating, which makes the sampling signals non-synchronous. And the spectral leakage and hurdle effect of DFT algorithm will result in obvious measurement errors, so the accuracy of measurement cannot meet the requirements. This paper introduces an improved DFT algorithm. The appropriate window functions and Phase Difference Correcting method are applied to obtain the precision frequency of the power system. The simulation results show it can meet the requirement of measurements for power system an it is effective and practicability. |
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| Keywords: | discrete Fourier transform （DFT） window functions phase difference correct frequency of power system |
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