*On-line Power Frequency Estimation Using Real-Time Wavelet Transform*

**DOI:**477 Downloads 6463 Views

**Author(s)**

**Abstract**

this paper proposes a new technique for estimating the fundamental frequency of power system in harmonic condition by using real-time wavelet transform. Indeed, the fundamental component of the distorted system voltage is extracted using real-time wavelet transform and then the frequency of the fundamental component can be estimated using a simple mathematical method. In spite of other methods for estimating the power frequency, which are so complicated and time consuming to have a good accuracy or simple methods which are not accurate in presence of harmonic, the proposed method can extract the power frequency not only so fast but also with acceptable accuracy. The fast operation of this technique makes its response more accurate in dynamic and transient conditions. Simulation results validate the proposed technique for power frequency estimation in harmonic condition. Also, comparisons of this technique and least square method are presented to show the advantageous of this novel method.

**Keywords**

power quality, power frequency estimation, real-time wavelet transform, Multi-Resolution Analysis (MRA)

**Cite this paper**

M. Forghani, S. Afsharnia,
On-line Power Frequency Estimation Using Real-Time Wavelet Transform
, *SCIREA Journal of Electrical Engineering*.
Volume 1, Issue 1, October 2016 | PP. 15-28.

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