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Hassan Bevrani

Hassan Bevrani

Academic rank: Professor
ORCID:
Education: PhD.
ScopusId: 55913436700
Faculty: Faculty of Engineering
Address: Dept. Of Electrical and Computer Eng, University of Kurdistan, Allameh Hamdi Blvd, Sanandaj PO Box 416, P. C: 66177-15175, Kurdistan, Iran
Phone: +98-87-33624001

Research

Title
Interconnected Autonomous AC Microgrids via Back-to-Back Converters—Part I: Small-Signal Modeling
Type
JournalPaper
Keywords
Interconnected, Autonomous, AC Microgrid,Back-to-Back
Year
2020
Journal IEEE TRANSACTIONS ON POWER ELECTRONICS
DOI
Researchers Frede Blaabjerg ، Hassan Bevrani ، Tomislav Dragicevic ، Qobad Shafiee ، Yusef Khayat ، Mobin Naderi

Abstract

In this paper, a set of autonomous AC Microgrids interconnected by back-to-back converters is taken into account, where they are supplied fully using voltage source converter-based distributed energy resources. A comprehensive and generalized small-signal model of the interconnected autonomous microgrids as a large-scale system is proposed using the interconnection method. The modeling is based on detailed module models to show the impact of each module on the dynamic modes, especially the dominant critical modes. It is generalized and scalable due to separate modeling of modules as well as using unlimited and expandable interconnecting. The proposed interconnection method deals with all electrical and control connections between individual modules including feed-back, feed-forward, augmentation, and the order of module inputs and outputs. The model is validated employing Prony analysis method and using output results of an OPAL-RT real-time simulator. Using the proposed modeling method, the small-signal stability analysis and controller design can be realized simply for interconnected microgrids with any number of microgrids and different structures. Typically for two interconnected microgrids, all dynamic modes and participant state variables in different frequency ranges are identified using the eigenvalue analysis and participation matrix in MATLAB.