Hybrid DC Link Voltage Balancing for Two-Leg Five-Level Neutral Point Clamped Inverter

Eshet T. Wodajo, Malik Elbuluk, Seungdeog Choi, Haitham Abu-Rub

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

Abstract

This paper proposes a Hybrid DC link voltage balancing of a 2-leg 5-level Neutral Point Clamped (NPC) inverter. The scheme uses a combination of active (hardware) based and software (modulation) based techniques to achieve a balancing solution with enhanced power quality performance. The active balancing scheme is implemented using a Fly-back auxiliary circuit that is coupled to the non-adjacent DC bus capacitors. The balancing circuit uses less power electronics components compared to alternative active balancing approaches. The complementary soft balancing is composed of three types of modulations to produce output waveform with improved total harmonic distortion performance. The applicability and proof of merits have been demonstrated by simulation of a Ladder transistor clamped NPC inverter under passive load.

Original languageEnglish
Title of host publication2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages4714-4720
Number of pages7
ISBN (Electronic)9781728103952
DOIs
Publication statusPublished - Sep 2019
Event11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States
Duration: 29 Sep 20193 Oct 2019

Publication series

Name2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

Conference

Conference11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
CountryUnited States
CityBaltimore
Period29/9/193/10/19

    Fingerprint

Keywords

  • Active balancing
  • Capacitor voltage balancing
  • Five-level balancing
  • Hybrid balancing
  • Multilevel inverter
  • Neutral point clamped (NPC)

ASJC Scopus subject areas

  • Mechanical Engineering
  • Control and Optimization
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Wodajo, E. T., Elbuluk, M., Choi, S., & Abu-Rub, H. (2019). Hybrid DC Link Voltage Balancing for Two-Leg Five-Level Neutral Point Clamped Inverter. In 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019 (pp. 4714-4720). [8912712] (2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2019.8912712