Predictive control of a single-phase cascaded h-bridge photovoltaic energy conversion system

Patricio Cortes, Samir Kouro, Francisco Barrios, Jose Rodriguez

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

29 Citations (Scopus)

Abstract

Grid-connected photovoltaic energy conversion systems are among the fastest growing energy systems of the last five years. Multilevel converters, and particularly the Cascaded H-Bridge (CHB), have attracted much attention for this application due to medium-voltage operation, improved power quality and higher efficiency. The CHB enables the connection of individual PV strings to the dc side of each power cell with independent maximum power point tracking (MPPT). This advantage is in turn a great challenge from a control point of view, since each cell will provide different instantaneous active power, for which modified modulation and control schemes are necessary to avoid voltage drift of the dc-link capacitors. This paper explores a model predictive control method, in which predictions for each possible switching state are computed and evaluated in a cost function, in order to select the appropriate control action. The proposed control scheme is capable of controlling the dc-link voltages to the desired MPPT reference voltage, while injecting sinusoidal current to the grid. Preliminary validation through simulation results are included for a five level CHB interfaced PV system.

Original languageEnglish
Title of host publicationConference Proceedings - 2012 IEEE 7th International Power Electronics and Motion Control Conference - ECCE Asia, IPEMC 2012
Pages1423-1428
Number of pages6
DOIs
Publication statusPublished - 2012
Event2012 IEEE 7th International Power Electronics and Motion Control Conference - ECCE Asia, IPEMC 2012 - Harbin, China
Duration: 2 Jun 20125 Jun 2012

Publication series

NameConference Proceedings - 2012 IEEE 7th International Power Electronics and Motion Control Conference - ECCE Asia, IPEMC 2012
Volume2

Other

Other2012 IEEE 7th International Power Electronics and Motion Control Conference - ECCE Asia, IPEMC 2012
Country/TerritoryChina
CityHarbin
Period2/06/125/06/12

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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