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Open AccessArticle

Risk Assessment of Micro Energy Grid Protection Layers

by Hossam A. Gabbar 1,2,* and Yahya Koraz 2
1
Faculty of Energy Systems and Nuclear Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON L1H7K4, Canada
2
Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON L1H7K4, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Gianfranco Chicco
Energies 2017, 10(8), 1176; https://doi.org/10.3390/en10081176
Received: 13 June 2017 / Revised: 8 July 2017 / Accepted: 3 August 2017 / Published: 10 August 2017
(This article belongs to the Special Issue Energy Conservation in Infrastructures 2016)
Micro energy grids (MEGs) are used extensively to meet the combined electricity, heating, and cooling energy demands for all types of customers. This paper develops a hazard matrix for a MEG and utilizes two advanced risk modeling approaches (fault tree and layer of protection analysis (LOPA)) for MEGs’ risk analysis. A number of independent protection layers (IPLs) have been proposed to achieve a resilient MEG, hence increasing its safety integrity level (SIL). IPLs are applied using co-generators and thermal energy storage (TES) techniques to minimize the hazards of system failure, increase efficiency, and minimize greenhouse gas emissions. The proposed modeling and risk assessment approach aims to design a resilient MEG, which can utilize those potentials efficiently. In addition, an energy risk analysis has been applied on each MEGs’ physical domains such as electrical, thermal, mechanical and chemical. The concurrent objectives achieve an increased resiliency, reduced emissions, and sustained economy. View Full-Text
Keywords: micro energy grid (MEG); risk assessment; layer of protection analysis (LOPA); fault tree analysis; independent protection layer (IPL) micro energy grid (MEG); risk assessment; layer of protection analysis (LOPA); fault tree analysis; independent protection layer (IPL)
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Gabbar, H.A.; Koraz, Y. Risk Assessment of Micro Energy Grid Protection Layers. Energies 2017, 10, 1176.

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