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http://dx.doi.org/10.5207/JIEIE.2012.26.7.070

Algorithm for Preventing Malfunction and Reclosing in Grid-Connected PV Systems  

Hwang, Min-Soo (서울과학기술대학교 산업대학원 전기공학과)
Jeon, Tae-Hyun (서울과학기술대학교 전기정보시스템공학과)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.26, no.7, 2012 , pp. 70-76 More about this Journal
Abstract
In general, the unidirectional power flow is normal in distribution feeders before activation of distributed power source such as PV. However, the interactive power flow is likely to occur in case of the power system under distributed generation. This interactive power flow can cause an unexpected effect on convectional protection coordination systems designed based only on the unidirectional power flow system. When the power line system encounters a problem, the interactive power flow can be a contributed current source and this makes the fault current bigger or smaller compared to the unidirectional case. The effect of interactive power flow is varied depending on the location of the point to ground fault, relative location of the PV, and connection method. Therefore it is important to analyse characteristics of fault current and interactive flow for various transformer connection and location of the PV. This paper proposes a method of improved protection coordination which can be adopted in the protective device for customers in distribution feeders interconnected with the PV. The proposed method is simulated and analysed using PSCAD/EMTDC under various conditions.
Keywords
Distributed Generation; Photovoltaic Power Generation; Bi-Directional Protective Coordination;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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