Master’s Thesis Defense at the University of Technology Discusses Voltage Analysis and Control in AC Microgrids Using PI and Fuzzy Logic Controllers

The Department of Electrical Engineering at the University of Technology awarded a master’s degree to Marwan Sadaid Ahmed for his thesis titled:
“Analysis of AC Microgrids Voltage Control Based on PI and Fuzzy Logic Controller.”

The thesis proposed two control methods for regulating voltage and improving the performance and efficiency of alternating current in microgrids (AC-MG). The methods involved the use of a Proportional-Integral (PI) Controller and a PI-Fuzzy Logic Controller to regulate the DC link voltage and the output voltage of a three-phase multilevel inverter.

The research utilized six photovoltaic arrays with a capacity of 102 kW, designed and simulated using the MATLAB/Simulink platform. Additionally, the study implemented the Incremental Conductance (INC) Algorithm to extract maximum power from the photovoltaic arrays. A five-level H-bridge multilevel inverter was used in the grid-connected mode to address mismatches among the six photovoltaic arrays and to enhance the overall efficiency of the photovoltaic system under grid-connected conditions.

The discussion panel for the thesis defense consisted of:

• Prof. Dr. Ali Abdul Abbas Abdullah (Chairperson)
• Asst. Prof. Dr. Sahar Radi Faraj (Member)
• Asst. Prof. Dr. Mohammed Hisham Abdul Hurr (Member)
• Prof. Dr. Dari Yousif Mahmood (Supervisor)
• Asst. Prof. Dr. Ali Hussein Noaman (Supervisor)

This research highlights innovative approaches to voltage control in AC microgrids, aiming to improve the efficiency and reliability of renewable energy systems in modern power networks.