Nested Microgrids: Operation and Control Requirement

Sammanfattning: Nested Microgrids refers to the interconnection of multiple microgrids into one network. Theyare connected through the Nested Microgrid Network which forms the electrical link betweenthem and facilitates power exchange.In this thesis the concept of Nested Microgrids is investigated. This resulted in theconceptualization of three different implementation methods. Inter-microgrid interaction in termsof controllers and required communication is also analyzed. The functions would differ from anormal microgrid and they are discussed thoroughly in this report. Real life projects are alsopresented.The efficacy and implementation of the proposed control functions are verified with time-domainsimulations. Four microgrid control functions, islanding, resynchronization, feeder load shed ongenerator overload and black start are investigated in Nested Microgrid scenarios. Differentcontrol strategies and exchange of information among the microgrid controllers are proposed forstable Nested Microgrids operation. This project provides the ground work for future work toexpand upon the theory provided and apply it into practical scenarios.