Enhanced Energy Management System for Distribution Network with Multi-Microgrids

Date of Award


Degree Name

Doctor of Philosophy


Electrical and Computer Engineering

First Advisor

Dr. Johnson A. Asumadu

Second Advisor

Dr. Azim Houshyar

Third Advisor

Dr. Massood Z Atashbar


Renewable Energy Sources (RESs), Energy Management System (EMS), Distributed Energy Resources (DERs), Multi-Microgrid (MMG), Low Voltage Ride Through (LVRT), Quasi-Proportional-Resonant (QPR)


The integration of renewable energy sources (RESs) to the conventional power system is increasing dramatically nowadays. In order to have a smooth and effective integration, the smart grid and microgrid concepts have to be implemented. Implementation of a smart grid with multi-microgrid requires enhanced energy management system (EMS). The necessity for robust EMS is drawing more attention nowadays due to the widespread of multi-microgrid connected to the distribution network. The EMS has to be optimized at both distributed energy resources (DERs) level and the Microgrid level. This work presents developed strategies for performing and assessing energy management in multi-microgrid electrical distribution networks. The microgrids under study consists Photovoltaic (PV) power plants, Fuel cell (FC) sources and local loads. A hierarchical control strategy including primary and secondary levels is proposed in this study to operate the three phase microgrids. The controlling strategy has been studied under different scenarios and the stability indicators have been carefully traced to maintain the operation within the pre-stated constraints. The proposed strategy is compared with conventional proportional-integral control and a PCC-based control method to check its validity. Test studies verify the superior performance of the proposed strategy in dealing with a sudden solar irradiation and load disturbances. IEEE 30 bus test system have been used to validate the results by using MATLAB/SIMULINK.

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