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Significance of Harmonic Filters by Computation of Short-Time Fourier Transform-Based Time–Frequency Representation of Supply Voltage

Author

Listed:
  • M. S. Priyadarshini

    (Department of Electrical and Electronics Engineering, K.S.R.M. College of Engineering, Kadapa 516003, India)

  • D. Krishna

    (Department of Electrical and Electronics Engineering, Anurag University, Hyderabad 500088, India)

  • Kurakula Vimala Kumar

    (Department of Electrical and Electronics Engineering, JNTUK University College of Engineering, Narasaraopet 522601, India)

  • K. Amaresh

    (Department of Electrical and Electronics Engineering, St. Peter’s Engineering College, Hyderabad 500100, India)

  • B. Srikanth Goud

    (Department of Electrical and Electronics Engineering, Anurag University, Hyderabad 500088, India)

  • Mohit Bajaj

    (Department of Electrical Engineering, Graphic Era (Deemed to be University), Dehradun 248002, India
    Applied Science Research Center, Applied Science Private University, Amman 11931, Jordan)

  • Torki Altameem

    (Computer Science Department, Community College, King Saud University, Riyadh 11451, Saudi Arabia)

  • Walid El-Shafai

    (Department of Electronics and Electrical Communications Engineering, Faculty of Electronic Engineering, Menoufia University, Menouf 32952, Egypt)

  • Mostafa M. Fouda

    (Department of Electrical and Computer Engineering, College of Science and Engineering, Idaho State University, Pocatello, ID 83209, USA)

Abstract

The nonlinear characteristics of power electronic-based loads in a power system contribute a major role in the harmonics’ injection and other power quality disturbances. This affects the quality of the power supplied to consumers by distribution systems. Flexible AC transmission system (FACTS) devices at the transmission level and custom power devices at the distribution level are used for an effective power transfer. In addition to these devices, filters play a prominent role in distribution systems. This paper aims to analyze the supply voltage in the time–frequency domain to perceive the variations in signal strength, explaining the role and significance of filters in mitigating or reducing harmonics. This paper presents the significance of harmonic filters in terms of signal-processing terminology. This depicts the prominent role of filters in improving the power quality by harmonic reduction or elimination, depending upon the requirement. The mathematical transform used in this approach is the short-time Fourier transform, which results in transforming the signal into a domain giving information about time and frequency. A MATLAB Simulink environment and ‘spectrogram’ were used to simulate harmonic signals, and we analyzed them using a short-time Fourier transform. Different windows were used with varying window size lengths.

Suggested Citation

  • M. S. Priyadarshini & D. Krishna & Kurakula Vimala Kumar & K. Amaresh & B. Srikanth Goud & Mohit Bajaj & Torki Altameem & Walid El-Shafai & Mostafa M. Fouda, 2023. "Significance of Harmonic Filters by Computation of Short-Time Fourier Transform-Based Time–Frequency Representation of Supply Voltage," Energies, MDPI, vol. 16(5), pages 1-25, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:5:p:2194-:d:1079311
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    References listed on IDEAS

    as
    1. Jeong-Sang Yoo & Yong-Man Gil & Tae-Young Ahn, 2022. "Steady-State Analysis and Optimal Design of an LLC Resonant Converter Considering Internal Loss Resistance," Energies, MDPI, vol. 15(21), pages 1-19, November.
    2. Ch. Rami Reddy & B. Srikanth Goud & Flah Aymen & Gundala Srinivasa Rao & Edson C. Bortoni, 2021. "Power Quality Improvement in HRES Grid Connected System with FOPID Based Atom Search Optimization Technique," Energies, MDPI, vol. 14(18), pages 1-29, September.
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    Cited by:

    1. Vitaly Kober, 2023. "Fast Generalized Sliding Sinusoidal Transforms," Mathematics, MDPI, vol. 11(18), pages 1-16, September.

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