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Fundamental frequency sequence amplitude estimator for power and energy applications

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  • Hafiz Ahmed
  • Zoheir Tir
  • Samet Biricik
  • Mohamed Benbouzid

Abstract

A grid-synchronization-based fundamental frequency positive-sequence (FFPS) and negative-sequence (FFNS) amplitudes estimation technique is proposed for unbalanced and distorted grid. In this technique, the sequence amplitudes are extracted by extracting the phase-angle of the FFPS and FFNS components. The extracted phase-angles have DC and double frequency AC components. The AC component is filtered out by using a Moving Average Filter (MAF) of appropriate window length. From the extracted phase-angle, the unknown frequency can be estimated by using a suitable controller. A frequency-fixed equidistant samples-based pre-loop filter is also applied to eliminate the effect of measurement offset. The proposed technique has a very simple structure and is easy to tune. Small-signal modeling-based stability analysis and gain tuning procedure are also provided. The proposed technique strikes a good balance between fast convergence and disturbance rejection capability. Comparative numerical simulation and experimental results with similar other techniques demonstrate the suitability and performance enhancement by the proposed technique.

Suggested Citation

  • Hafiz Ahmed & Zoheir Tir & Samet Biricik & Mohamed Benbouzid, 2022. "Fundamental frequency sequence amplitude estimator for power and energy applications," PLOS ONE, Public Library of Science, vol. 17(8), pages 1-20, August.
    • Handle: RePEc:plo:pone00:0270851
    DOI: 10.1371/journal.pone.0270851
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    1. repec:plo:pone00:0164856 is not listed on IDEAS
    2. Fadi M Albatsh & Shameem Ahmad & Saad Mekhilef & Hazlie Mokhlis & M A Hassan, 2015. "Optimal Placement of Unified Power Flow Controllers to Improve Dynamic Voltage Stability Using Power System Variable Based Voltage Stability Indices," PLOS ONE, Public Library of Science, vol. 10(4), pages 1-32, April.
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