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IJSTR >> Volume 9 - Issue 5, May 2020 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Islanding Detection In A Ress Supplied Microgrid Using Pmu-Fuzzy Logic Algorithm

[Full Text]



L.O. Mogaka, G.N. Nyakoe, M. J. Saulo



Phasor Measurement Unit, Loss of Mains detection, Power system islanding, Microgrids



Islanding and loss of mains detection is very essential in power systems for the safety and reliability in grid connected and standalone Renewable Energy Sources (RESs). These RESs produce power intermittently that can lead to voltage variation, unintentional islanding and total blackouts in case of a contingency. This calls for fast, reliable and local techniques of islanding detection and voltage control criteria within the islanded microgrid (MG) and a means for seamless switching between islanded and grid connected modes. A number of islanding detection methods have been proposed so far. However, many of them fail to give reliable results in microgrids that have high penetration of multi-source RESs. This paper develops a technique for islanding detection using phasor measurement units (PMUs) and fuzzy logic algorithm for local signal extraction and classification at the point of common coupling (PCC) between the MG and the utility grid. The robustness of the proposed approach is established through application to IEEE 9 bus system with high penetration of RESs in a MATLAB/Simulink platform under different contingencies. The obtained results indicate that the proposed algorithm is fast, reliable, and secure in discriminating between the islanding and non-islanding scenarios for the tested cases.



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