Hybrid Average Modeling of Three-Phase Dual Active Bridge Converters for Stability Analysis

The three-phase dual active bridge (3p-DAB) converter is widely addressed in emerging power systems applications such as solid-state transformer and dc microgrids. Its successful integration requires accurate modeling of its small-signal characteristics. Due to its dc-ac-dc structure, the DAB conver...

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Veröffentlicht in:IEEE transactions on power delivery 2018-08, Vol.33 (4), p.2020-2029
Hauptverfasser: Berger, Maxime, Kocar, Ilhan, Fortin-Blanchette, Handy, Lavertu, Carl
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container_end_page 2029
container_issue 4
container_start_page 2020
container_title IEEE transactions on power delivery
container_volume 33
creator Berger, Maxime
Kocar, Ilhan
Fortin-Blanchette, Handy
Lavertu, Carl
description The three-phase dual active bridge (3p-DAB) converter is widely addressed in emerging power systems applications such as solid-state transformer and dc microgrids. Its successful integration requires accurate modeling of its small-signal characteristics. Due to its dc-ac-dc structure, the DAB converter brings many challenges to small-signal modeling. The state-space averaging (SSA) has been the first proposed methodology to approximate the control-to-output and line-to-output transfer functions of the 3p-DAB. However, as shown in this paper, SSA is not precise for the stability analysis of 3p-DAB converters. A generalized state-space averaging (GSSA) model based on the dynamic phasor concept is developed in this paper for the Y-Δ 3p-DAB. A hybrid SSA and GSSA model representation is then proposed for the evaluation of all the converter transfer functions. The developed models are validated with detailed time-domain switch-level simulations in an electromagnetic transient-type (EMT-type) program. They are also used for the accelerated stability prediction in an EMT-type program.
doi_str_mv 10.1109/TPWRD.2018.2817878
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Its successful integration requires accurate modeling of its small-signal characteristics. Due to its dc-ac-dc structure, the DAB converter brings many challenges to small-signal modeling. The state-space averaging (SSA) has been the first proposed methodology to approximate the control-to-output and line-to-output transfer functions of the 3p-DAB. However, as shown in this paper, SSA is not precise for the stability analysis of 3p-DAB converters. A generalized state-space averaging (GSSA) model based on the dynamic phasor concept is developed in this paper for the Y-Δ 3p-DAB. A hybrid SSA and GSSA model representation is then proposed for the evaluation of all the converter transfer functions. The developed models are validated with detailed time-domain switch-level simulations in an electromagnetic transient-type (EMT-type) program. 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subjects bidirectional converters
Biological system modeling
Bridge circuits
Computer simulation
dc-dc conversion
Distributed resources
dual active bridge
dynamic phasor
Electric bridges
Electric converters
Electric power grids
electromagnetic transients program
generalized averaging
Mathematical model
Mathematical models
Modelling
Power system stability
Stability analysis
state-space averaging
Transfer functions
Voltage control
title Hybrid Average Modeling of Three-Phase Dual Active Bridge Converters for Stability Analysis
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