Journal ArticleDOI
A precise calculation of power system frequency and phasor
Jun-Zhe Yang,Chih-Wen Liu +1 more
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TLDR
In this article, a series of precise digital algorithms based on discrete Fourier transforms (DFT) to calculate the frequency and phasor in real-time are proposed, which are called the Smart Discrete Fourier Transform (SDFT).Abstract:
A series of precise digital algorithms based on discrete Fourier transforms (DFT) to calculate the frequency and phasor in real-time are proposed. These algorithms, called the smart discrete Fourier transforms (SDFT) family, not only keep all of the advantages of DFT but also smartly take frequency deviation and harmonics into consideration. These make the SDFT family more accurate than the other methods. Besides, the SDFT family is recursive and very easy to implement, so it is very suitable for use in real-time. The authors provide the simulation results compared with conventional DFT method and second-order Prony method to validate the claimed benefits of SDFT.read more
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A New PMU-Based Fault Location Algorithm for Series Compensated Lines
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References
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Journal ArticleDOI
A New Measurement Technique for Tracking Voltage Phasors, Local System Frequency, and Rate of Change of Frequency
TL;DR: In this paper, the frequency and rate-of-change of frequency at the bus can also be determined from the positive sequence voltage phase angle, and the theoretical basis of these computations and results of experiments performed in the AEP power system simulation laboratory are also outlined.
Journal ArticleDOI
Frequency tracking in power networks in the presence of harmonics
TL;DR: In this paper, a modified zero-crossing method using curve fitting of voltage samples is proposed, and polynomial fitting of the discrete Fourier transform (DFT) quasi-stationary phasor data for calculation of the rate of change of the positive sequence phase angle.
Journal ArticleDOI
Voltage phasor and local system frequency estimation using Newton type algorithm
TL;DR: A new approach to the design of a digital algorithm for voltage phasor and local system frequency estimation is presented using Newton's iterative method, which showed a very high level of robustness as well as high measurement accuracy over a wide range of frequency changes.
Journal ArticleDOI
A Least Error Squares Technique For Determining Power System Frequency
M.S. Sachdev,M. M. Giray +1 more
TL;DR: An algorithm for measuring frequency at a power system bus is presented and the effects of key parameters, that affect the performance of the algorithm, are discussed.
Journal ArticleDOI
Real-time determination of power system frequency
Tadeusz Lobos,Jacek Rezmer +1 more
TL;DR: In this paper, the authors presented a new method of measurement of power system frequency, based on digital filtering and Prony's estimation method, which is more accurate than others, e.g., the measurement of angular velocity of the rotating voltage phasor.