相对频率误差
Both theory and numerical computation show that the error of active power and power factor measurement is proportional to the relative frequency deviation when the conventional algorithm is used, while it is proportional to square of the relative frequency deviation when the proposed weighted algorithm is used.
传统算法的有功功率、功率因数的测量误差与相对频偏成正比;而用该文所提出的三角窗加权算法,有功功率、功率因数的测量误差与相对频偏的平方成正比。
A weighted algorithm of Triangular window and wavelet transform are using to measure active power and power factor of three-phase asynchronous motor in the non-sinusoidal waveform. The error of active power and power factor is proportional to square of relative frequency deviation.
采用三角窗加权算法并结合小波变换计算非正弦状态下三相异步电机有功功率、功率因数,其测量误差与相对频偏的平方成正比。
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