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Passive Islanding Detection of Inverter-Based Resources in a Noisy Environment

Author

Listed:
  • Hossein Amini

    (The Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA)

  • Ali Mehrizi-Sani

    (The Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA)

  • Reza Noroozian

    (Department of Electrical Engineering, University of Zanjan, University Blvd., Zanjan 3879145371, Iran)

Abstract

Islanding occurs when a load is energized solely by local generators and can result in frequency and voltage instability, changes in current, and poor power quality. Poor power quality can interrupt industrial operations, damage sensitive electrical equipment, and induce outages upon the resynchronization of the island with the grid. This study proposes an islanding detection method employing a Duffing oscillator to analyze voltage fluctuations at the point of common coupling (PCC) under a high-noise environment. Unlike existing methods, which overlook the noise effect, this paper mitigates noise impact on islanding detection. Power system noise in PCC measurements arises from switching transients, harmonics, grounding issues, voltage sags and swells, electromagnetic interference, and power quality issues that affect islanding detection. Transient events like lightning-induced traveling waves to the PCC can also introduce noise levels exceeding the voltage amplitude by more than seven times, thus disturbing conventional detection techniques. The noise interferes with measurements and increases the nondetection zone (NDZ), causing failed or delayed islanding detection. The Duffing oscillator nonlinear dynamics enable detection capabilities at a high noise level. The proposed method is designed to detect the PCC voltage fluctuations based on the IEEE standard 1547 through the Duffing oscillator. For the voltages beyond the threshold, the Duffing oscillator phase trajectory changes from periodic to chaotic mode and sends an islanded operation command to the inverter. The proposed islanding detection method distinguishes switching transients and faults from an islanded operation. Experimental validation of the method is conducted using a 3.6 kW PV setup.

Suggested Citation

  • Hossein Amini & Ali Mehrizi-Sani & Reza Noroozian, 2024. "Passive Islanding Detection of Inverter-Based Resources in a Noisy Environment," Energies, MDPI, vol. 17(17), pages 1-20, September.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:17:p:4405-:d:1470218
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    References listed on IDEAS

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    1. Wang, QiuBao & Yang, YueJuan & Zhang, Xing, 2020. "Weak signal detection based on Mathieu-Duffing oscillator with time-delay feedback and multiplicative noise," Chaos, Solitons & Fractals, Elsevier, vol. 137(C).
    2. Mohammad Abu Sarhan, 2023. "An Extensive Review and Analysis of Islanding Detection Techniques in DG Systems Connected to Power Grids," Energies, MDPI, vol. 16(9), pages 1-22, April.
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