Circulating current control for parallel interleaved VSCs connected in whiffletree configuration

Lorand Bede, Ghanshyamsihn Gohil, Mihai Ciobotaru, Tamas Kerekes, Remus Teodorescu, Vassilios G. Agelidis

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution


This paper presents a Proportional Resonant (PR) based circulating current controller for four parallel interleaved Voltage Source Converters (VSCs). Interleaving the carrier signals will cause a switching frequency circulating current to flow between the VSCs. Therefore, to suppress these circulating currents the VSCs are interconnected through Coupled Inductors (CIs), which form a whiffletree configuration, and they are used to suppress the switching frequency circulating current. On the other hand, the CIs are highly sensitive to fundamental frequency circulating currents, which may saturate them. Hence, a circulating current controller is required, which effectively controls the fundamental component of the circulating current. Furthermore, the circulating current is sampled using a special technique, which does not require any additional. The effectiveness of the design methodology and the performance of the circulating current controller are verified by simulation and experimental results as well.
Original languageEnglish
Title of host publication2016 IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
Subtitle of host publicationproceedings
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Electronic)9781467386173
ISBN (Print)9781467386180
Publication statusPublished - 2016
Externally publishedYes


  • Coupled Inductors
  • Interleaved VSC
  • Whiffletree
  • Circulating Current Control

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