Capacitor voltage balancing of a five-level diode-clamped converter based on a predictive current control strategy

Jiangchao Qin, Maryam Saeedifard

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

15 Scopus citations

Abstract

Dc-capacitor voltage drift phenomenon is the main technical issue of an n-level (n>3) Diode-Clamped Converter (DCC). This paper presents a predictive current control strategy for a three-phase five-level DCC which enables simultaneous control of ac-side currents and balance of capacitor voltages. The paper derives a discrete-time dynamic model of a five-level DCC. Based on the derived model, a predictive current control strategy is proposed. The proposed control strategy provides prominent features of ac-side current control and capacitor voltage balancing by using a simple and straightforward procedure. The performance of a five-level DCC with the proposed control method, under various operating conditions, is evaluated based on time-domain simulation studies in the MATLAB/SIMULINK environment. The simulation results demonstrate the capability of the proposed predictive current control to control the currents and to maintain voltage balance of the dc capacitors, simultaneously, without any requirement to complicated calculations.

Original languageEnglish (US)
Title of host publication2011 26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011
Pages1656-1660
Number of pages5
DOIs
StatePublished - May 13 2011
Externally publishedYes
Event26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011 - Fort Worth, TX, United States
Duration: Mar 6 2011Mar 10 2011

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Other

Other26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011
CountryUnited States
CityFort Worth, TX
Period3/6/113/10/11

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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