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Georgia Institute of Technology

Multilevel Converters for Medium/High-Power Applications

Georgia Institute of Technology via edX


The modular multilevel converter (MMC) has become the most attractive multilevel converter topology for medium/high-power applications, specifically for voltage-sourced converter high-voltage direct current (VSC–HVDC) transmission systems. In comparison with other multilevel converter topologies, the salient features of the MMC include:

1) Modularity and scalability to meet any voltage level requirements,

2) High efficiency, which is of significant importance for high-power applications,

3) Superior harmonic performance, specifically in high-voltage applications where a large number of identical submodules (SMs) with low-voltage ratings are stacked up, thereby the size of passive filters can be reduced, and

4) Absence of dc-link capacitors.

Over the past few years, there has been a significant effort towards addressing the technical challenges associated with the operation and control of the MMC as well as broadening its applications.

The main intention of this MOOC is to introduce the MMC topology and its operational and control challenges along with the most recent solutions to address those challenges.


  • Module 1: Basics of Inverters
    • Principles of operation of single-phase and three-phase DC-AC inverters, Space phasors and alpha-beta reference frame, Space vector modulation for three-phase inverters, Current control mode of inverters
  • Module 2: Modeling and Control of Grid-Connected Inverters
    • Modeling of three-phase grid-connected inverters, Closed-loop control of three-phase inverters
  • Module 3: Multilevel Converters
    • Basics of multilevel converters, Various multilevel converter topologies
  • Module 4: Modular Multilevel Converters
    • Basics of cascaded half-bridge and full-bridge modules, Control aspects of the modular multilevel converter, Circulating current control
  • Module 5: Control of Grid-Connected Modular Multilevel Converters
    • Control of grid-connected modular multilevel converter, Control of the MMC for High-Voltage DC (HVDC) transmission

Taught by

Maryam Saeedifard

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4.8 rating, based on 4 reviews

Start your review of Multilevel Converters for Medium/High-Power Applications

  • Anonymous

    Anonymous completed this course.

    I did learn about multilevel voltage source inverters and their basics of operation. Specially the emerging MMC was my favorite part. Strongly recommend to whoever wants to do research in this area.
  • Anonymous

    Anonymous completed this course.

    A very good course on basics of multilevel converters and modular multilevel converters.There are also assignments to reinforce the materials.
  • Anonymous

    Anonymous completed this course.

    Was a very useful course for whoever wants to learn about multilevel voltage source converters. Particulalr for the emerging MMC topology.
  • Profile image for Tejas Deshpande
    Tejas Deshpande

    Tejas Deshpande completed this course, spending 4 hours a week on it and found the course difficulty to be hard.

    A good course for people interested in MMC and having basic knowledge of MATLAB is important for completing the project

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