A Highly Precise Anti-harmonic Frequency Measurement Algorithm
The continuous increase of proportion of new energy sources in power grid has led to deteriorated inertia and primary frequency regulation,which urges the significance of assistance of new energy generations in frequency regulation.Frequency measurement is an important criterion for new energy to participate in frequency regulation.The harmonic con-tent in the new power grid integrated with large-scale new energy sources is far greater than that in the conventional power grid,which puts forward higher requirements for the frequency measurement algorithm.In this paper a harmonic-inde-pendent highly precise frequency measurement algorithm is obtained by using the filtering characteristics of full cycle Fou-rier,and the parabolic interpolation and average filtering are used in an iterative manner.The proposed algorithm is indica-ted by simulation capable of achieving high-precision frequency measurement results of 0.002 Hz under frequency offset and harmonic conditions.
full cycle Fourierfrequency measurementparabola interpolationaverage filteringanti-harmonic
NETL
NSTL
万方数据
维普
