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Distributed control architecture of power electronics building-block-based frequency converters

Journal Article:

Abstract

The increasing power demand and emerging applications drive the design of electrical power converters into modularization. Despite the wide use of modularized power stage structures, the control schemes that are used are often traditional, in other words, centralized. The flexibility and re-usability of these controllers are typically poor. With a dedicated distributed control scheme, the flexibility and re-usability of the system parts, building blocks, can be increased. Only a few distributed control schemes have been introduced for this purpose, but their breakthrough has not yet taken place. A demand for the further development of flexible control schemes for building-block-based applications clearly exists. The control topology, communication, synchronization, and functionality allocation aspects of building-block-based converters are studied in this doctoral thesis. A distributed control scheme that can be easily adapted to building-block-based power converter designs is developed. The example applications are a parallel and series connection of building blocks. The building block that is used in the implementations of both the applications is a commercial off-the-shelf two-level three-phase frequency converter with a custom-designed controller card. The major challenge with the parallel connection of power stages is the synchronization of the building blocks. The effect of synchronization accuracy on the system performance  More>>
Authors:
Publication Date:
Jul 01, 2010
Product Type:
Journal Article
Resource Relation:
Journal Name: Acta Universitatis Lappeenrantaensis; Journal Volume: 12; Journal Issue: 403; Other Information: Thesis or Dissertation; TH: Thesis (D. Tech.)
Subject:
42 ENGINEERING; CONTROL SYSTEMS; DISTRIBUTED STRUCTURES; FREQUENCY CONVERTERS; SYNCHRONIZATION; DESIGN
OSTI ID:
1010361
Research Organizations:
Lappeenranta Univ. of Technology (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1456-4491; TRN: FI1103020
Submitting Site:
FI
Size:
page(s) 1-114
Announcement Date:
Apr 04, 2011

Journal Article:

Citation Formats

Laakkonen, T. Distributed control architecture of power electronics building-block-based frequency converters. Finland: N. p., 2010. Web.
Laakkonen, T. Distributed control architecture of power electronics building-block-based frequency converters. Finland.
Laakkonen, T. 2010. "Distributed control architecture of power electronics building-block-based frequency converters." Finland.
@misc{etde_1010361,
title = {Distributed control architecture of power electronics building-block-based frequency converters}
author = {Laakkonen, T}
abstractNote = {The increasing power demand and emerging applications drive the design of electrical power converters into modularization. Despite the wide use of modularized power stage structures, the control schemes that are used are often traditional, in other words, centralized. The flexibility and re-usability of these controllers are typically poor. With a dedicated distributed control scheme, the flexibility and re-usability of the system parts, building blocks, can be increased. Only a few distributed control schemes have been introduced for this purpose, but their breakthrough has not yet taken place. A demand for the further development of flexible control schemes for building-block-based applications clearly exists. The control topology, communication, synchronization, and functionality allocation aspects of building-block-based converters are studied in this doctoral thesis. A distributed control scheme that can be easily adapted to building-block-based power converter designs is developed. The example applications are a parallel and series connection of building blocks. The building block that is used in the implementations of both the applications is a commercial off-the-shelf two-level three-phase frequency converter with a custom-designed controller card. The major challenge with the parallel connection of power stages is the synchronization of the building blocks. The effect of synchronization accuracy on the system performance is studied. The functionality allocation and control scheme design are challenging in the seriesconnected multilevel converters, mainly because of the large number of modules. Various multilevel modulation schemes are analyzed with respect to the implementation, and this information is used to develop a flexible control scheme for modular multilevel inverters. (orig.)}
journal = {Acta Universitatis Lappeenrantaensis}
issue = {403}
volume = {12}
place = {Finland}
year = {2010}
month = {Jul}
}