An improved phasor based algorithm for accurate frequency measurement

A novel algorithm, called the improved phasor based algorithm (IPBA), to estimate the frequency of a power system is proposed. The IPBA calculates the difference of phase angles using transformed consecutive points of a DFT to reduce the leakage effects. The proposed algorithm has the following meri...

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Bibliographic Details
Published inMathematical and computer modelling Vol. 54; no. 3; pp. 1021 - 1029
Main Authors Yu, Jingwen, Xue, Hui, Wen, Boying
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.08.2011
Elsevier
Subjects
Discrete Fourier Transform (DFT)
Exact sciences and technology
Frequency domain analysis
Frequency measurement
Mathematical analysis
Mathematics
Methods of scientific computing (including symbolic computation, algebraic computation)
Numerical analysis. Scientific computation
Sciences and techniques of general use
Frequency domain analysis
Discrete Fourier Transform (DFT)
Frequency measurement
Fourier transformation
Applied mathematics
Mathematical model
Algorithm
Steady state
Implementation
Computer aided analysis
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Summary:A novel algorithm, called the improved phasor based algorithm (IPBA), to estimate the frequency of a power system is proposed. The IPBA calculates the difference of phase angles using transformed consecutive points of a DFT to reduce the leakage effects. The proposed algorithm has the following merits: it has higher precision than a conventional phasor based algorithm; it is immune to inter-harmonics as well as harmonics; it has simple and easy implementation; it has good performance both in steady and dynamic states. What is more, it can keep high precision in a very wide frequency deviation range, for example, 30–70 Hz for a 50 Hz system. The performance of the IPBA is compared with a phasor based algorithm through simulation experiments.
ISSN:0895-7177
1872-9479
DOI:10.1016/j.mcm.2010.11.031