Improved Predictive Control of Three-Level-NPC Power Converters

Xinbo Cai, Zhenkun Zhang, Jin Zhang, Zhen Li, Ralph Kennel, Zhenbin Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

This paper presents the results of a study on a neutral-point voltage balancing scheme applied to three-level neutral point clamped (NPC) power converters. The proposed control method was executed within the model predictive control (MPC) framework. The usual means of maintaining the accuracy of current in MPC schemes employ the use of a weighting factor to account for the compromise with effective neutral point voltage balance and reference tracking. In this work, we present a different method that decouples the current and neutral point voltage balance, avoiding the use of a weighting factor. This new method resulted in a 29.9% reduction in the assessment of the switching states and there is no necessary to predict the DC link voltage. We validate our control method using simulation data and experimental studies. It demonstrates the ability of proposed approach to decrease computational costs and enhance the system performance, such as better neutral voltage balancing capabilities, faster DC-link voltage control dynamic, and smaller total harmonic distortions total harmonic distortion (THD) in both the phase current and voltage.

Original languageEnglish
Title of host publication6th IEEE International Conference on Predictive Control of Electrical Drives and Power Electronics, PRECEDE 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages393-402
Number of pages10
ISBN (Electronic)9781665425575
DOIs
StatePublished - 2021
Event6th IEEE International Conference on Predictive Control of Electrical Drives and Power Electronics, PRECEDE 2021 - Jinan, China
Duration: 20 Nov 202122 Nov 2021

Publication series

Name6th IEEE International Conference on Predictive Control of Electrical Drives and Power Electronics, PRECEDE 2021

Conference

Conference6th IEEE International Conference on Predictive Control of Electrical Drives and Power Electronics, PRECEDE 2021
Country/TerritoryChina
CityJinan
Period20/11/2122/11/21

Keywords

  • Neutral-Point-Clamped(NPC) inverter
  • deadbeat control
  • neutral-point voltage balance control
  • three-level space vector modulation

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