skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Decentralized Carrier Interleaving in Cascaded Multilevel DC-AC Converters: Preprint

Abstract

Cascaded dc-ac converters with interleaved carriers are commonly used in applications where elevated voltages and low-distortion multilevel waveforms are needed. Example applications include modular multilevel converters and solid-state transformers. In such systems, carrier interleaving is generally achieved via communication among the stacked converters or a centralized controller. Due to the large number of converters in such a system, existing approaches entail significant wiring complexity and communication may limit resilience to failures. In this paper, we introduce a control strategy which achieves communication-free carrier interleaving among series-connected converters. The proposed controller is embedded within each converter control loop and only requires measurements available at each set of converter terminals. We formulate a dynamic system model and show that the system converges to the interleaved condition irrespective of the number of converters in the stack. After outlining a practical method for digital implementation, experiments are shown on a hardware-in-the-loop setup.

Authors:
 [1];  [1];  [2];  [2];  [3];  [2];  [1]
  1. University of Washington
  2. University of Colorado
  3. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
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); USDOE National Renewable Energy Laboratory (NREL), Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1562440
Report Number(s):
NREL/CP-5D00-74846
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the 2019 20th Workshop on Control and Modeling for Power Electronics (IEEE COMPEL), 17-20 June 2019, Toronto, Canada
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; switch interleaving; cascaded H-bridges; phase-shifted PWM; communication-free interleaving; decentralized control

Citation Formats

Dutta, Soham, Malik, Rahul, Majmunovic, Branko, Mukherjee, Satyaki, Seo, Gabsu, Maksimovic, Dragan, and Johnson, Brian. Decentralized Carrier Interleaving in Cascaded Multilevel DC-AC Converters: Preprint. United States: N. p., 2019. Web. doi:10.1109/COMPEL.2019.8769699.
Dutta, Soham, Malik, Rahul, Majmunovic, Branko, Mukherjee, Satyaki, Seo, Gabsu, Maksimovic, Dragan, & Johnson, Brian. Decentralized Carrier Interleaving in Cascaded Multilevel DC-AC Converters: Preprint. United States. doi:10.1109/COMPEL.2019.8769699.
Dutta, Soham, Malik, Rahul, Majmunovic, Branko, Mukherjee, Satyaki, Seo, Gabsu, Maksimovic, Dragan, and Johnson, Brian. Wed . "Decentralized Carrier Interleaving in Cascaded Multilevel DC-AC Converters: Preprint". United States. doi:10.1109/COMPEL.2019.8769699. https://www.osti.gov/servlets/purl/1562440.
@article{osti_1562440,
title = {Decentralized Carrier Interleaving in Cascaded Multilevel DC-AC Converters: Preprint},
author = {Dutta, Soham and Malik, Rahul and Majmunovic, Branko and Mukherjee, Satyaki and Seo, Gabsu and Maksimovic, Dragan and Johnson, Brian},
abstractNote = {Cascaded dc-ac converters with interleaved carriers are commonly used in applications where elevated voltages and low-distortion multilevel waveforms are needed. Example applications include modular multilevel converters and solid-state transformers. In such systems, carrier interleaving is generally achieved via communication among the stacked converters or a centralized controller. Due to the large number of converters in such a system, existing approaches entail significant wiring complexity and communication may limit resilience to failures. In this paper, we introduce a control strategy which achieves communication-free carrier interleaving among series-connected converters. The proposed controller is embedded within each converter control loop and only requires measurements available at each set of converter terminals. We formulate a dynamic system model and show that the system converges to the interleaved condition irrespective of the number of converters in the stack. After outlining a practical method for digital implementation, experiments are shown on a hardware-in-the-loop setup.},
doi = {10.1109/COMPEL.2019.8769699},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {9}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: