Power System Frequency Estimation by Using a Newton-Type Technique for Smart Meters

This paper proposes a single-phase grid voltage fundamental frequency estimation technique for smart meters. The technique relies on a nonlinear Newton-type algorithm and a recursive differentiation filter (NTA-DF). It can reject the negative effects caused by dc offset, harmonics, notches, and spik...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2015-03, Vol.64 (3), p.615-624
Main Authors: Reza, Md Shamim, Ciobotaru, Mihai, Agelidis, Vassilios G.
Format: Article
Language:English
Subjects:
Band-pass filters
Estimation
Frequency estimation
Harmonic analysis
IEC standards
Newton-type algorithm (NTA)
single-phase voltage system
smart grid
smart meters (SMs)
Time-frequency analysis
Vectors
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Summary:This paper proposes a single-phase grid voltage fundamental frequency estimation technique for smart meters. The technique relies on a nonlinear Newton-type algorithm and a recursive differentiation filter (NTA-DF). It can reject the negative effects caused by dc offset, harmonics, notches, and spikes. When compared with a NTA technique based on least-squares (NTA-LS), the proposed one reduces matrix dimensions, avoids matrix inversion, and is computationally efficient, thus requiring less hardware and associated cost for real-time implementation. Moreover, unlike the NTA-LS technique, the NTA-DF shows less sensitivity to the presence of harmonics. Simulation and experimental results are presented to verify the performance of the proposed technique.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2014.2347671