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ABSTRACT
Continuous operation of Renewable Energy Systems (RES) is achieved either in grid-connected mode or in autonomous mode in the form of Islands or Microgrid, which has predefined boundaries. Thus, distribution systems should be capable of detecting islanding condition for smooth transition to an Islanded mode. In this article, a hybrid islanding detection method, which combines remote and passive methods, is proposed. Distributed Generation (DG) units can be in the form of inverter interfaced or synchronous based generators and when used together can cause difficulti¥es in islanding detection such as delay or inaccurate detection. The number of DG units in the network also affects the accuracy of islanding detection. Thus a new hybrid method, which is based on communication and passive methods, is proposed to overcome this problem. The accuracy and effectiveness of the proposed hybrid method is investigated using PSCAD software. The proposed detection method features an improvement in detection accuracy.
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Notes on contributors
Aref Pouryekta
Aref Pouryekta, corresponding author, received his B.Sc. degree and M.Sc. degree in Electrical Engineering from Iran, in 2006 and 2010 respectively. Currently, he is pursuing his Ph.D. at University Tenaga Nasional, Malaysia. His research interests are renewable energy integration, microgrid stability and power system modeling. Email: [email protected]
Vigna K. Ramachandaramurthy
Vigna K. Ramachandaramurthy completed his PhD at UMIST, UK in 2001. He is presently a professor and Heads the Power Quality Research Group in University Tenaga Nasional, Malaysia. His main research interests are power system studies, power system protection, power quality, renewable energy integration and grid impact of distributed generation.