摘要
提出了一种实用的高精度频率测量方法,能够精确测量电力系统的基波频率。结合电压过零点测频法测得的频率,对原固定采样频率下的采样序列采用拉格朗日线性插值法抽取新的采样序列,最终利用傅氏算法测得高精度频率。该方法不仅消除传统傅氏测频时的频谱泄露及栅栏效应,而且可以很好的抑制谐波的影响。测试结果证明该方法实现简单、准确,能够满足电力系统对频率测量精度及实时性的要求。
This paper proposes an utility high-accuracy algorithm for measurement of frequency which can accurately obtain fundamental frequency.According to voltage crossing points algorithm measurement frequency,Interpolating new sampling series from original fixed sampling series by the linear Lagrange interpolation algorithm.Finallily obtain high-accuracy frequency by fourier filter algorithm.The algorithm eliminates the tradition fourier filter spectral leakage and barrier effect in measurement frequency.Moreover...
出处
《继电器》
CSCD
北大核心
2007年第S1期272-275,共4页
Relay
关键词
频率测量
电压过零点
拉格朗日插值
frequency measurement
voltage crossing points
lagrange interpolation
