采用小波变换和三点法的频率测量

讨论了在电力系统保护和控制中对基波信号中的间谐波进行小波变换来计算基波频率,但检测结果有少许误差;三点法也是检测频率常用的方法,它通过任意三个等间隔采样点提取正弦信号频率,合理的选择检测点之间的间隔可以使误差最小。运用小波变换与三点法结合可以高精度的对基波频率进行检测,仿真验证了方法的可行性。

Use Three-point algorithm and wavelet transform to frequency detection

in the power system protection and control of the harmonics between the fundamental signal use the wavelet transform to calculate the fundamental frequency,but the test results exit a little error;Three-point algorithm commonly used in the frequency detection,it is through any three equally spaced sampling points extracted sinusoidal signal frequency,a reasonable choice of the interval between the detection point can be to minimize the error.Three-point algorithm and wavelet transform combined can be detect...