Browse > Article
http://dx.doi.org/10.5370/KIEE.2012.61.1.022

Islanding Detection for a Micro-Grid based on the Instantaneous Active and Reactive Powers in the Time Domain  

Lee, Young-Gui (전북대 대학원 전기공학과)
Kim, Yeon-Hee (전북대 대학원 전기공학과)
Zheng, Tai-Ying (전북대 풍력에너지전력망적응기술연구센터)
Kim, Tae-Hyun (명지전문대 정보공학부)
Kang, Yong-Cheol (전북대 공대 전기공학과, 전북대 풍력에너지전력망 적응기술연구센터, 전북대 스마트그리드연구센터)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.61, no.1, 2012 , pp. 22-27 More about this Journal
Abstract
Correct and fast detection of a micro-grid (MG) islanding is essential to the MG since operation, control and protection of the MG depend on an operating mode i.e., an interconnected mode or an islanding mode. When islanding occurs, the frequency of the point of common coupling (PCC) is not the nominal frequency during the transient state owing to the frequency rise or drop of generators in the MG. Thus, the active and reactive power calculated by the frequency domain based method such as Fourier Transform might contain some errors. This paper proposes an islanding detection algorithm for the MG based on the instantaneous active and reactive powers delivered to the dedicated line in the time domain. During the islanding mode, the instantaneous active and reactive powers delivered to the dedicated line are constants, which depend on the voltage of the PCC and the impedance of the dedicated line. In this paper, the instantaneous active and reactive powers are calculated in the time domain and used to detect islanding. The performance of the proposed algorithm is verified under various scenarios including islanding conditions, fault conditions and load variation using the PSCAD/EMTDC simulator. The results indicate that the algorithm successfully detects islanding for the MG.
Keywords
Islanding detection; Micro-grid; Dedicated line; Instantaneous active power; Instantaneous reactive power;
Citations & Related Records
연도 인용수 순위
  • Reference
1 N. Hatziargyriou, H. Asano, R. Iravani, and C. Marnay,, "Microgrids," IEEE Power & Energy Magazine, vol. 5, no. 4, pp. 78 94, Jul./Aug. 2007.
2 G. Venkataramanan, and C. Marnay, "A larger role for microgrids," IEEE Power & Energy magazine, vol. 6, no. 3, pp. 78-82, May/Jun. 2008.
3 R. Lasseter, A. Akhil, C. Marnay, J. Stevens, J. Dagle, R. Guttromson, A. S. Meliopoulous, R. Yinger, and J. Eto, "White paper on integration of distributed energy resources-the CERTS microgrid concept", Lawrence Berkeley National Laboratory, Berkeley, California, U. S. A. [Online]. Available: http://certs.lbl.g ov/pdf/50829-app.pdf.
4 F. Katiraei, M. R. Iravaniand, and P. W. Lehn, "Micro-grid autonomous operation during and subsequent to islanding process," IEEE Trans. on Power Del., vol. 20, no. 1, pp. 248-257, Jan. 2005.   DOI   ScienceOn
5 N. Jayawarna, N. Jenkins, M. Lorentzou, S. Papthanassiou, and N. Hatziagyriou, "Safety analysis of a microgrid," 2005 International Conference on Future Power Systems, Netherlands, 2005.
6 M. A. Redferm, O. Usta, and G. Fielding, "Protection against loss of utility grid supply for a dispersed storage and generation unit," IEEE Trans. on Power Del., vol. 8, no. 3, pp. 948-954, Jul. 1993.   DOI   ScienceOn
7 P. O. Kane, and B. Fox, "Loss of mains detection for embedded generation by system impedance monitoring," in Proc. Sixth International Conference on Developments in Power System Protection, pp. 95-98, Mar. 25-27, 1997.
8 S. I. Jang, and K. H. Kim, "Development of a new islanding detection method for distributed resources," Trans. on Korean Institute of Electrical Engineers, vol. 50A, no. 11, pp. 506-513, Nov. 2001.
9 KS C IEC Std 60044-1, "Instrument transformers - Part 1：Current transformers," 2003.
10 Y. C. Kang, S. H. Cha, S. I. Jang, H. G. Kang, Y. G. Kim, and G. C. Park, "Islanding detection based on complex power at the intertie," Trans. on Korean Institute of Electrical Engineers, vol. 57, no. 12, pp. 2167-2172, Dec. 2008.
11 KS C IEC Std 60044-2, "Instrument transformers - Part 2：Inductive voltage transformers," 2003.