Islanding Detection Method for Inverter-Based Distributed Generation by Injecting Second Order Harmonic Current Byung-Moon Han   2019/07/15

Abstract

This paper proposes a new islanding detection scheme for the inverter-based distributed generator by injecting negligible amount of the 2nd order harmonic current. A proportional resonant controller was used for the output current control of the inverter, and a proportional resonant filter was used
for extracting the 2nd order harmonic voltage at the point of common coupling (PCC). The islanding state can be detected by measuring the magnitude ratio of the 2nd order harmonic voltage to the fundamental voltage when the 2nd order harmonic current with 0.8% magnitude is injected.

Authors and affiliations

Byung-Moon Han
Dept. of Electrical Engineering. Myongji University. Yongin, Korea

Key words

Inverter-based distributed generation (DG), Islanding detection, 2nd order harmonic current injection, Proportional resonant (PR) controller, Proportional resonant filter

References

[1] Liu F, Kang Y, Zhang Y, et al. “Improved SMS islanding detection method for grid-connected converters,”
Renewable Power Generation, 4(1): pp. 36-42, 2010.
[2] Youngseok Jung, Jaeho Choi, and G. Yu, “A Novel Active Anti-islanding Method for Grid-connected Photovoltaic
Inverter,” Journal of Power Electronics, Vol. 7, No. 1 p. 64-71, 2007.
[3] Zhihui Dai; Zhiqiang Chong; Xuan Liu; Chuan Li, "Active islanding detection method based on grid-connected
photovoltaic inverter and negative sequence current injection," Power System Technology (POWERCON), 2014 International Conference on , pp.1685,1690, 20-22 Oct. 2014
[4] H. Karimi, A. Yazdani and R. Iravani, "Negative-Sequence Current Injection for Fast Islanding Detection of a
Distributed Resources," IEEE Trans. on Power Electronics, vol. 23, no. 1, Jan. 2008.
[5] D. Reigosa, F. Briz, C. Charro, P. Garcia, and M. Guerrero, "Active Islanding Detection Using High-Frequency Signal
Injection," IEEE Trans. on Industry Application, vol. 48, no. 5, pp. 1588–1597, Sept./Oct. 2012.
[6] R. Teodorescu and F. Blaabjerg, “Proportional-resonant controllers. A new breed of controllers suitable for gridconnected voltage-source converters,” in Proc. OPTIM, 2004, vol. 3, pp. 9–14.