电力系统及其自动化学报2017，Vol.29Issue(2)：21-26,6.DOI:10.3969/j.issn.1003-8930.2017.02.004
过零检测和曲线拟合的电力系统频率算法
Power System Frequency Algorithm Based on Zero Crossing Detection and Curve Fitting
摘要
Abstract
In this paper,a new discrete Fourier transform(DFT)frequency algorithm is proposed based on band pass fil-tering,zero crossing detection and least square nonlinear curve fitting. First,the original signal is filtered by a band pass filter,and zero crossing detection is used to calculate the frequency value of filtered signal,which is adopted as the reference frequency of least square nonlinear curve fitting. Second,the fitted sine curve is resampled,and DFT al-gorithm is used to calculate the frequency of resampled data. The simulation results show that the proposed algorithm can restrain or eliminate the effect of noise and frequency fluctuation on the frequency synchronization measurement , which improves the accuracy of frequency measurement.关键词
过零检测/最小二乘非线性曲线拟合/离散傅里叶变换/频率测量/带通滤波Key words
zero crossing detection/least square nonlinear curve fitting/discrete Fourier transform(DFT)/frequency measurement/band pass filtering分类
信息技术与安全科学引用本文复制引用
赵庆生,谢运华,郭贺宏,张学军..过零检测和曲线拟合的电力系统频率算法[J].电力系统及其自动化学报,2017,29(2):21-26,6.基金项目
国家自然科学青年基金资助项目(51505317) （51505317）
山西省自然科学基金资助项目(2015011057) （2015011057）
