Course info

Course Overview

Microgrids are deemed as one of the main building blocks of the smart grids; since they are able to facilitate the implementation of many smart grid functions. On the other hand, the proliferation of different nonlinear and single-phase loads in electrical systems has resulted in voltage harmonics and unbalance as two common power quality problems. In addition, harmonic resonances can be excited giving rise to a significant increase of the voltage distortion. These phenomena can cause variety of problems such as protective relays malfunction, overheating of motors and transformers and failure of power factor correction capacitors.

Therefore, in this course, measurement, compensation, and damping of such power quality problems will be addressed through several basic and advanced control methodologies. 

Learning Objectives

  • Illustrate power quality problems including harmonics, power?frequency deviations, voltage fluctuations, voltage dips, swells, interruptions, and voltage unbalance.
  • Apply various techniques for power quality improvement in microgrids including active power Injection, reactive power-sharing, harmonic current sharing and voltage regulation via smart loads.
  • Design virtual impedance loops for load sharing and power quality  Improvement.

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Course Structure

  • Lesson 1 - Introduction to Power Quality Issues in AC Microgrids
  • Lesson 2 - Voltage Regulation and Power Sharing in Microgrids
  • Lesson 3 - Virtual Impedance Loops for Power Quality Improvement


Alexander Micallef

Alexander Micallef is a Lecturer at the Department of Electrical Energy Conversion, Faculty of Engineering, University of Malta. He is Associate Editor for the IEEE Access and the IET Smart Grids journal. He is a senior member of IEEE and is involved in activities of the IEEE PES SBLCS Technical Committee. His research interests include renewable energy systems, control, and management of distributed generation and energy storage systems, AC and DC microgrids


Mehdi Savaghebi

Mehdi Savaghebi is Associate Professor with Electrical Engineering Section, the Mads Clausen Institute, University of Southern Denmark. His main research interests include distributed generation systems, microgrids, power quality and protection of electrical systems UPS systems


Mashood Nasir

Mashood Nasir received his BS degree in Electrical Engineering from UET Lahore, Pakistan and MS in Electrical Engineering from UMT Lahore, and Ph.D. in Electrical Engineering from Lahore University of Management Sciences, Pakistan in 2009 and 2011, and 2018 respectively. From 2011 to 2012, he served as a lecturer and from 2013-2014 he served as an assistant professor in the Electrical Engineering department at UMT, Lahore. From, May 2017 to Nov 2017 he was a visiting Ph.D. researcher at the Microgrid Laboratory in Aalborg University Denmark. From 2018-2019 he served as an assistant professor at Lahore University of Management Science. Currently, he is a postdoctoral research fellow at Aalborg University Denmark. His research interests mainly include but not limited to power electronics, electrical machines and drives, grid integration of alternate energy resources, electrochemical energy conversion and battery storage systems and AC/DC/Hybrid microgrids.