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Title: Decentralized Interleaving of Paralleled Dc-Dc Buck Converters

Abstract

We present a decentralized control strategy that yields switch interleaving among parallel-connected dc-dc buck converters. The proposed method is based on the digital implementation of the dynamics of a nonlinear oscillator circuit as the controller. Each controller is fully decentralized, i.e., it only requires the locally measured output current to synthesize the pulse width modulation (PWM) carrier waveform and no communication between different controllers is needed. By virtue of the intrinsic electrical coupling between converters, the nonlinear oscillator-based controllers converge to an interleaved state with uniform phase-spacing across PWM carriers. To the knowledge of the authors, this work presents the first fully decentralized strategy for switch interleaving in paralleled dc-dc buck converters.

Authors:
 [1];  [1];  [2];  [2];  [3]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  2. University of Minnesota
  3. University of California at Berkeley
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
OSTI Identifier:
1399842
Report Number(s):
NREL/CP-5D00-70299
DOE Contract Number:
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the 2017 IEEE 18th Workshop on Control and Modeling for Power Electronics (COMPEL), 9-12 July 2017, Stanford, California
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; dc dc converter; buck converter; nonlinear oscillator; controller; carrier waveform; pulse width modulation

Citation Formats

Johnson, Brian B, Rodriguez, Miguel, Sinha, Mohit, Dhople, Sairaj, and Poon, Jason. Decentralized Interleaving of Paralleled Dc-Dc Buck Converters. United States: N. p., 2017. Web. doi:10.1109/COMPEL.2017.8013331.
Johnson, Brian B, Rodriguez, Miguel, Sinha, Mohit, Dhople, Sairaj, & Poon, Jason. Decentralized Interleaving of Paralleled Dc-Dc Buck Converters. United States. doi:10.1109/COMPEL.2017.8013331.
Johnson, Brian B, Rodriguez, Miguel, Sinha, Mohit, Dhople, Sairaj, and Poon, Jason. Mon . "Decentralized Interleaving of Paralleled Dc-Dc Buck Converters". United States. doi:10.1109/COMPEL.2017.8013331.
@article{osti_1399842,
title = {Decentralized Interleaving of Paralleled Dc-Dc Buck Converters},
author = {Johnson, Brian B and Rodriguez, Miguel and Sinha, Mohit and Dhople, Sairaj and Poon, Jason},
abstractNote = {We present a decentralized control strategy that yields switch interleaving among parallel-connected dc-dc buck converters. The proposed method is based on the digital implementation of the dynamics of a nonlinear oscillator circuit as the controller. Each controller is fully decentralized, i.e., it only requires the locally measured output current to synthesize the pulse width modulation (PWM) carrier waveform and no communication between different controllers is needed. By virtue of the intrinsic electrical coupling between converters, the nonlinear oscillator-based controllers converge to an interleaved state with uniform phase-spacing across PWM carriers. To the knowledge of the authors, this work presents the first fully decentralized strategy for switch interleaving in paralleled dc-dc buck converters.},
doi = {10.1109/COMPEL.2017.8013331},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Aug 21 00:00:00 EDT 2017},
month = {Mon Aug 21 00:00:00 EDT 2017}
}

Conference:
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  • We present a decentralized control strategy that yields switch interleaving among parallel connected dc-dc buck converters without communication. The proposed method is based on the digital implementation of the dynamics of a nonlinear oscillator circuit as the controller. Each controller is fully decentralized, i.e., it only requires the locally measured output current to synthesize the pulse width modulation (PWM) carrier waveform. By virtue of the intrinsic electrical coupling between converters, the nonlinear oscillator-based controllers converge to an interleaved state with uniform phase-spacing across PWM carriers. To the knowledge of the authors, this work represents the first fully decentralized strategy formore » switch interleaving of paralleled dc-dc buck converters.« less
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  • A special interleaving operation of the Advanced Photon Source's injector requires three dipole magnets to selectively direct linac beam bunches into the storage ring during ''top-up'' operation. A versatile switching mode power supply has been designed and built for the magnets to meet that requirement. This paper presents the main circuit, the circuit analysis, and the test results.
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