A Review of Phasor Estimation Algorithms

In this paper the most commonly used algorithms for estimating phasor parameters are presented. The most algorithms based on recursive and non-recursive DFT algorithm are presented too. For each algorithm is shown: advantages, disadvantages, mode of operation and possible future research. Furthermore, algorithms for estimating phasor parameters based on finite and infinite impulse response filters are presented. For each of them the mode of operation, advantages and disadvantages are shown. Future research is possible for a filter with a infinite impulse response due to better characteristics compared to filters with a finite impulse response as; they detect signal more accurately and faster in half cycle period of frequency. Wavelet transform ie. its recursive version is also presented in this paper as they have been proven to be very good for application in PMU devices because these algorithms eliminate DC component and work much faster than algorithms based on finite or infinite impulse responses filters. Wavelet transformations have great potential for future research in the field of estimating phasor parameters using new wavelets, multiresolution analysis, connection to filter records and more.