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Energies 2018, 11(2), 323; https://doi.org/10.3390/en11020323

Design, Evaluation and Implementation of an Islanding Detection Method for a Micro-grid

1
College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
2
Department of Energy IT, Gachon University, Seoul 13120, Korea
3
Department of Electrical and Electronic Engineering, University of Manchester, Manchester M13 9PL, UK
*
Author to whom correspondence should be addressed.
Received: 30 December 2017 / Revised: 22 January 2018 / Accepted: 30 January 2018 / Published: 2 February 2018
(This article belongs to the Section Electrical Power and Energy System)
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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 its operating mode i.e., an interconnected mode or islanding mode. This study describes the design, evaluation and implementation of an islanding detection method for an MG, which includes a natural gas-fired generator, a doubly fed induction generator type wind generator, a photovoltaic generator, and some associated local loads. The proposed method is based on the instantaneous active and reactive powers at the point of common coupling (PCC) of the MG. During the islanding mode, the instantaneous active and reactive powers at the PCC are constants, which depend on the voltage of the PCC and the impedance of the dedicated line. The performance of the proposed method is verified under various scenarios including islanding conditions for the different outputs of the MG, and fault conditions by varying the position, type, inception angle and resistance of the fault, using the PSCAD/EMTDC simulator. This paper also concludes by implementing proposed method into a TMS320C6701 digital signal processor. The results indicate that the proposed method successfully detects islanding for the MG in islanding conditions, and remains stable in fault conditions. View Full-Text
Keywords: distributed generation; islanding detection; instantaneous active power; instantaneous reactive power; micro-grid distributed generation; islanding detection; instantaneous active power; instantaneous reactive power; micro-grid
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Zheng, T.; Yang, H.; Zhao, R.; Kang, Y.C.; Terzija, V. Design, Evaluation and Implementation of an Islanding Detection Method for a Micro-grid. Energies 2018, 11, 323.

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