Copyright © Smart/Micro Grids Research Center, 2018 University of Kurdistan Dept. of Electrical Engineering Smart/Micro Grids Research Center smgrc.uok.ac.ir Robust Frequency Control of Microgrids Using an Extended Virtual Synchronous Generator Abdolwahhab Fathi, Qobad Shafiee, and Hassan Bevrani Published (to be published) in: IEEE Transactions on Power Systems (Expected) publication date: 2018 Citation format for published version: A. Fathi, Q. Shafiee, and H. Bevrani ‘‘Robust Frequency Control of Microgrids Using an Extended Virtual Synchronous Generator,’’ IEEE Transactions on Power Systems, vol.x, no. x, pp. xx-xx, 2018. Copyright policies:  Download and print one copy of this material for the purpose of private study or research is permitted.  Permission to further distributing the material for advertising or promotional purposes or use it for any profit- making activity or commercial gain, must be obtained from the main publisher.  If you believe that this document breaches copyright please contact us at smgrc@uok.ac.ir providing details, and we will remove access to the work immediately and investigate your claim.