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A New Islanding Detection Method using Phase-Locked Loop for Inverter-Interfaced Distributed Generators
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 Title & Authors
A New Islanding Detection Method using Phase-Locked Loop for Inverter-Interfaced Distributed Generators
Chung, Il-Yop; Moon, Seung-Il;
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 Abstract
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.
 Keywords
Distributed Generator (DG);Interconnection Problem;Islanding Detection;Inverter Phase Locked Loop (PLL);
 Language
English
 Cited by
1.
Control parameter optimization for multiple distributed generators in a microgrid using particle swarm optimization, European Transactions on Electrical Power, 2011, 21, 2, 1200  crossref(new windwow)
2.
Control Methods of Inverter-Interfaced Distributed Generators in a Microgrid System, IEEE Transactions on Industry Applications, 2010, 46, 3, 1078  crossref(new windwow)
3.
Analysis of Phase-Locked Loop Low-Frequency Stability in Three-Phase Grid-Connected Power Converters Considering Impedance Interactions, IEEE Transactions on Industrial Electronics, 2015, 62, 1, 310  crossref(new windwow)
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