{"id":11984,"date":"2026-09-06T11:14:21","date_gmt":"2026-09-06T08:14:21","guid":{"rendered":"https:\/\/en.coeng.uobaghdad.edu.iq\/?p=11984"},"modified":"2026-09-06T11:14:21","modified_gmt":"2026-09-06T08:14:21","slug":"university-of-baghdad-witnesses-masters-thesis-defense-discussing-power-quality-improvement-solutions-in-microgrids","status":"publish","type":"post","link":"https:\/\/en.coeng.uobaghdad.edu.iq\/?p=11984","title":{"rendered":"University of Baghdad Witnesses Master’s Thesis Defense Discussing Power Quality Improvement Solutions in Microgrids"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text css=””]<\/p>\n

The Smart Hall at the College of Engineering, University of Baghdad, hosted a Master’s thesis defense at 9:00 AM on Thursday, September 3, 2026. The thesis was presented by researcher Rania Emad Hamdi, a student in the Department of Electrical Engineering (Power and Machines specialization), titled:<\/p>\n

“Voltage Unbalanced Compensation in AC Microgrids Based on Distributed Control Strategy”<\/p>\n

The thesis was submitted as part of the requirements for obtaining a Master of Science degree in Electrical Engineering, under the supervision of Prof. Dr. Firas Mohammed Tuaimah.<\/p>\n

The study highlights reliability and sustainability solutions in modern power systems, particularly islanded AC microgrids, which serve as an effective option for integrating Distributed Energy Resources (DERs).<\/p>\n

The researcher addresses the issue of unbalanced loads, which leads to negative-sequence voltage components. This causes power quality degradation, increased losses in power electronic converters, and reduced equipment efficiency.<\/p>\n

 <\/p>\n

To address these challenges, the study proposes two advanced hierarchical control designs:<\/p>\n

    \n
  1. Primary Compensation Strategy: This strategy employs a Second-Order Generalized Integrator (SOGI) to extract positive and negative voltage components, integrating the negative sequence into the voltage control loop to achieve fast local compensation without requiring additional communication networks.<\/li>\n
  2. Distributed Cooperative Secondary Control Strategy: This strategy combines SOGI technology with a Proportional-Resonant (PR) controller to coordinate voltage compensation across multiple distributed generation units, while ensuring frequency restoration, voltage regulation, and accurate active\/reactive power sharing.<\/li>\n<\/ol>\n

    Simulation models conducted by the researcher using MATLAB\/Simulink under various operating scenarios demonstrated significant scientific outcomes, including:<\/p>\n

    -Reduction of Voltage Unbalance Factor (VUF): The primary control design successfully reduced the VUF from 11.36% to 0.25% (a 97.8% improvement), while the distributed secondary control design lowered it from 1.9% to approximately 0.1% (a 95% improvement).<\/p>\n

    -Power Sharing Accuracy: Precise distribution of active and reactive power along with rapid dynamic response during inverter plug-and-play tests was achieved.<\/p>\n

    -Efficiency Enhancement: There was a notable drop in negative-sequence reactive power, positively reflecting on the overall operational performance of the microgrid.<\/p>\n

    The precise results obtained by the researcher are expected to open new avenues for direct practical application, particularly in supporting and developing smart, sustainable energy grids.<\/p>\n

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