Optimal design of high power MMC-based LCL DC/DC converter

Aliakbar Jamshidi Far, Masood Hajian, Dragan Jovcic, Yash Audichya

Research output: Chapter in Book/Report/Conference proceedingPublished conference contribution

8 Citations (Scopus)


This paper presents an optimal design of the modular multilevel converter (MMC) based LCL DC/DC converter suitable for high voltage direct current (HVDC) systems. The design aims in minimizing the converter total power losses, harmonic pollution, volume and weight. The optimal values for the converter main parameters affecting the above objectives including cell capacitance, operating frequency, and number of cells are determined using in depth analytical and simulation studies. It is shown that a minimum number of cells equal to 40 with an operating frequency of 300Hz/500Hz for onshore/offshore applications gives best trade-off between converter total losses, overall size, and weight. In addition, the harmonics level for AC and DC sides are kept within the acceptable range. A 1GVA, ±250kV/±320kV MMC-based LCL DC/DC converter is designed and modelled in PSCAD and the converter total losses are estimated in the range of 1.61-2.17%.
Original languageEnglish
Title of host publicationPower and Energy Society General Meeting (PESGM), 2016
PublisherIEEE Explore
ISBN (Electronic)978-1-5090-4168-8
ISBN (Print)978-1-5090-4169-5
Publication statusPublished - 2016
Event2016 IEEE Power and Energy Society General Meeting, PESGM 2016 - Boston, United States
Duration: 17 Jul 201621 Jul 2016


Conference2016 IEEE Power and Energy Society General Meeting, PESGM 2016
Country/TerritoryUnited States


  • Harmonic analysis
  • Circuit faults
  • switching loss
  • algorithm design and analysis
  • frequency conversion
  • capacitators
  • System analysis and design
  • DC/DC power converters
  • HVDC transmission


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