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Compatibility Issues with Irregular Current Injection Islanding Detection Methods and a Solution

Author

Listed:
  • Menghua Liu

    (Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Wei Zhao

    (Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Qing Wang

    (Department of Engineering, Durham University, Durham DH1 3LE, UK)

  • Songling Huang

    (Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

  • Kunpeng Shi

    (Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

Abstract

Islanding detection methods, based on injecting high-/low-frequency currents or negative sequence fundamental frequency currents and observing the resultant responses, are collectively referred to as irregular current injection methods in this paper. In multi-distributed generation (DG) operation, if there is no restriction to the phase of injected irregular currents, the currents at the same frequency may cancel each other out, and then their convergent current may be too small to cause a detectable response, for which reason islanding detection will be severely affected. Accordingly, this paper raises a compatibility issue, which requires the phase difference between any two injected irregular currents to be within a certain interval. In response to this issue, a solution is proposed. According to this solution, the terminal voltage of DG units is referenced to conduct irregular currents injection, and only certain high-frequency currents are used as injected currents. If this solution is adopted by as many manufacturers as possible, the effect and reliability of such methods will be greatly improved.

Suggested Citation

  • Menghua Liu & Wei Zhao & Qing Wang & Songling Huang & Kunpeng Shi, 2019. "Compatibility Issues with Irregular Current Injection Islanding Detection Methods and a Solution," Energies, MDPI, vol. 12(8), pages 1-20, April.
  • Handle: RePEc:gam:jeners:v:12:y:2019:i:8:p:1467-:d:223821
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    References listed on IDEAS

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    1. Menghua Liu & Wei Zhao & Qing Wang & Songling Huang & Kunpeng Shi, 2018. "An Irregular Current Injection Islanding Detection Method Based on an Improved Impedance Measurement Scheme," Energies, MDPI, vol. 11(9), pages 1-18, September.
    2. Maen Z. Kreishan & George P. Fotis & Vasiliki Vita & Lambros Ekonomou, 2016. "Distributed Generation Islanding Effect on Distribution Networks and End User Loads Using the Load Sharing Islanding Method," Energies, MDPI, vol. 9(11), pages 1-24, November.
    3. Dionisis Voglitsis & Fotis Valsamas & Nick Rigogiannis & Nick Papanikolaou, 2018. "On the Injection of Sub/Inter-Harmonic Current Components for Active Anti-Islanding Purposes," Energies, MDPI, vol. 11(9), pages 1-19, August.
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    Cited by:

    1. Arash Abyaz & Habib Panahi & Reza Zamani & Hassan Haes Alhelou & Pierluigi Siano & Miadreza Shafie-khah & Mimmo Parente, 2019. "An Effective Passive Islanding Detection Algorithm for Distributed Generations," Energies, MDPI, vol. 12(16), pages 1-19, August.

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