Active voltage balancing control of a seven-level hybrid multilevel converter topology

Vahid Dargahi, Arash Khoshkbar Sadigh, Ramin Rahimzadeh Khorasani, Jose Rodriguez

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The series connection of a standard three-level active neutral-point-clamped (ANPC) inverter and two cascaded H-bridge (CHB) modules comprising the flying capacitors (FCs) instead of the isolated dc voltage sources forms a seven-level hybrid topology that is referred to as improved ANPC (I-ANPC) converter. This article proposes an active voltage balancing technique for control of this hybrid multilevel inverter. The suggested method is based on a set of effortless logic equations that aim to stabilize the FC voltages within the CHB modules at their requisite reference values as well as to control the output voltage of the overall hybrid converter based on the phase-shifted-carrier pulsewidth modulation strategy. The experimental results obtained from a single-phase I-ANPC inverter's prototype are presented to validate the proposed control technique and its simple logic equations.

Original languageEnglish (US)
Pages (from-to)74-89
Number of pages16
JournalIEEE Transactions on Industrial Electronics
Issue number1
StatePublished - Jan 1 2022

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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