Shireen, Wajiha2019-09-182019-09-18August 2012017-08August 201https://hdl.handle.net/10657/4838The existing electrical power system is experiencing radical changes in parallel with the growing integration of Distributed Energy Resources (DER) such as Photovoltaic (PV), Wind Turbine Generators, Fuel Cell etc. DERs with locally connected loads create subsystems within the main grid which are termed as microgrids. As microgrid becomes an important part of the distribution system, issues and challenges arising from its implementation should be addressed. Amongst many such issues such as voltage regulation, phase balance, reactive power control, stability etc., protection is a major challenge for the microgrid. In view of the issues related to microgrid protection, this thesis discusses the inadequacy of the conventional protection scheme, fault behavior of inverter interfaced DERs, and impact on the coordination of relays. The thesis also proposes the adaptive protection algorithm to be applied with extensive IEC 61850 communication protocol between Microgrid Central Protection Unit and relays. A small laboratory based microgrid was setup to prove the proposed algorithm.application/pdfengThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).MicrogridProtectionIEC 61850 Communication protocol2019-09-18Thesisborn digital