Recursive and non-recursive algorithms for power system real time phasor estimations

•Recusrsive and nonrecursive phasor estimation methods considering a real time implementation.•The methods are evaluated using the tests defined by the IEEE C37.118.1 standard.•Methods were tested via Real Time Digital Simulator.•Processing time of methods is presented considering the hardware appli...

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Bibliographic Details
Published in:Electric power systems research 2017-02, Vol.143, p.802-812
Main Authors: Rocha, Rodolfo Varraschim, Coury, Denis Vinicius, Monaro, Renato Machado
Format: Article
Language:English
Subjects:
Algorithms
Computer simulation
Discrete Fourier Transform
Discrete Wavelet Transform
Electric power
Electric power systems
Fourier transforms
IEEE C37.118.1
Least Squares
Phasor Measurement Units
Phasors
Real time
Real Time Digital Simulator
Recursive methods
Test procedures
Wavelet transforms
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Summary:•Recusrsive and nonrecursive phasor estimation methods considering a real time implementation.•The methods are evaluated using the tests defined by the IEEE C37.118.1 standard.•Methods were tested via Real Time Digital Simulator.•Processing time of methods is presented considering the hardware application. This work presents some of the computational algorithms used for phasor estimations in Electrical Power Systems. The IEEE C37.118.1 standard establishes the phasor estimation structure and performance, but does not define the algorithm itself to be used. Considering this, various methods can be adopted provided that the standard precision is met. Some estimation algorithms presented in the literature were compared in this paper, and their behavior was evaluated for some test cases. The methods: Discrete Fourier Transform, Recursive Discrete Fourier Transform, Least Squares, Recursive Least Squares, Discrete Wavelet Transform and Recursive Wavelet Transform were tested using synthetic signals, evaluating the Total Vector Error, response and delay times, as well as overshoot. The algorithms were also embedded in hardware and evaluated by simulated signals, using the outputs of a Real Time Digital Simulator.
ISSN:0378-7796
1873-2046
DOI:10.1016/j.epsr.2016.08.034