1. Hybrid Average Modeling of Three-Phase Dual Active Bridge Converters for Stability Analysis.
- Author
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Berger, Maxime, Kocar, Ilhan, Fortin-Blanchette, Handy, and Lavertu, Carl
- Subjects
ELECTRIC current converters ,THREE-phase alternating currents ,ELECTRIC machinery stability ,ELECTRIC transformers ,SOLID state electronics ,DC-to-DC converters ,ELECTROMAGNETISM ,ELECTRIC transients ,MATHEMATICAL models - Abstract
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. [ABSTRACT FROM PUBLISHER]
- Published
- 2018
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