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Hybrid Average Modeling of Three-Phase Dual Active Bridge Converters for Stability Analysis.
- Source :
-
IEEE Transactions on Power Delivery . Aug2018, Vol. 33 Issue 4, p2020-2029. 10p. - Publication Year :
- 2018
-
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]
Details
- Language :
- English
- ISSN :
- 08858977
- Volume :
- 33
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Power Delivery
- Publication Type :
- Academic Journal
- Accession number :
- 129615001
- Full Text :
- https://doi.org/10.1109/TPWRD.2018.2817878