基于傅氏滤波的频率离线搜索新方法  

A New Offline Frequency Search Algorithm Based on Fourier Filter

作　　者：钱洁[1] 汪建敏[1] 钟文慧[1] 李俊[1] 

机构地区：[1]江西省电力公司检修分公司,江西南昌330029

出　　处：《江西电力职业技术学院学报》2015年第2期1-3,共3页Journal of Jiangxi Vocational and Technical College of Electricity

摘　　要：傅式算法在电力系统得到了广泛应用。改变计算数据窗,傅氏算法得到的实部和虚部满足一个恒等式,由此得到一种新的频率离线搜索方法,通过指定搜索区,可准确搜索出基波频率。对该算法进行了仿真计算,仿真结果表明,该算法具有较高的计算精度,具有一定工程应用价值。The paper derives a new offline frequency search algorithm processed by fourier algorithm and discovers that with the changing of data window the real part and imaginary part from fourier algorithm satisfy an identical equation. Thus a new offline search method of frequency measurement is attained. It can accurately obtain fundamental frequency by assigning investigation area. After this algorithm is tested, the results prove it with higher accuracy and certain application value of engineering.

关 键 词：傅氏滤波 频率测量 离线搜索 

分 类 号：TM935[电气工程—电力电子与电力传动]