Journal of Electrical Engineering and Technology

  • 제2권2호
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  • Pages.165-171
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  • 2007
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  • 1975-0102(pISSN)
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  • 2093-7423(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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A New Islanding Detection Method using Phase-Locked Loop for Inverter-Interfaced Distributed Generators

  • Chung, Il-Yop (Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University) ;
  • Moon, Seung-Il (School of Electrical Engineering and Computer Science, Seoul National University)
  • 발행 : 2007.06.01
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초록

This paper proposes a new islanding detection method for inverter-interfaced distributed generators (DG). To detect islanding conditions, this paper calculates the phase angle variation of the system voltage by using the phase-locked loop (PLL) in the inverter controllers. Because almost all inverter systems are equipped with the PLL, the implementation of this method is fairly simple and economical for inverter-interfaced DGs. The detection time can also be shortened by reducing communication delay between the relays and the DGs. The proposed method is based on the fact that islanding conditions result in the frequency and voltage variation of the islanded area. The variation depends on the amount of power mismatch. To improve the accuracy of the detection algorithm, this paper injects small low-frequency reactive power mismatch to the output power of DG.

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참고문헌

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피인용 문헌

  1. Analysis of Phase-Locked Loop Low-Frequency Stability in Three-Phase Grid-Connected Power Converters Considering Impedance Interactions vol.62, pp.1, 2015, https://doi.org/10.1109/TIE.2014.2334665
  2. Control parameter optimization for multiple distributed generators in a microgrid using particle swarm optimization vol.21, pp.2, 2011, https://doi.org/10.1002/etep.424
  3. Control Methods of Inverter-Interfaced Distributed Generators in a Microgrid System vol.46, pp.3, 2010, https://doi.org/10.1109/TIA.2010.2044970
  4. Case Studies for Non-Detection of Islanding by Grid-Connected In-Parallel Photovoltaic and Electrical Energy Storage Systems Inverters vol.9, pp.5, 2019, https://doi.org/10.3390/app9050817