An analytical modeling and estimating losses of power semiconductors in a three-phase dual active bridge converter for MVDC grids

Lee, Youngsil; Vakil, Gaurang; Watson, Alan James; Wheeler, Patrick

Abstract

Due to the increasing installation of renewable and decentralized power sources, Medium-voltage dc (MVDC) grids has been considered for an alternative application to medium-voltage ac (MVAC) application. Three-phase dual active bridge DC-DC (3DAB) converter is proposed as an attractive topology for MVDC grids due to its high power capability, smaller filtering parts, and galvanic isolation. In this paper, a first harmonic approximation (FHA) modeling of 3DAB converter is derived. Using the FHA modeling, a symmetrical modeling of switching devices is introduced and a 4MVA system for 40kV MVDC system has been validated in terms of conduction and switching losses. Experimental implementation of a 10kVA prototype and the results are presented.

Citation

Lee, Y., Vakil, G., Watson, A. J., & Wheeler, P. An analytical modeling and estimating losses of power semiconductors in a three-phase dual active bridge converter for MVDC grids. Presented at IEEE Power and Energy Conference at Illinois

• Conference Name: IEEE Power and Energy Conference at Illinois
• End Date: Feb 24, 2017
• Acceptance Date: Dec 9, 2016
• Publication Date: Feb 24, 2016
• Deposit Date: Feb 8, 2017
• Publicly Available Date: Feb 8, 2017
• Peer Reviewed: Peer Reviewed
• Keywords: Dual active bridge, DC-DC converter, MVDC, Power losses
• Public URL: https://nottingham-repository.worktribe.com/output/775464
• Publisher URL: http://ieeexplore.ieee.org/document/7935740/
• Related Public URLs: http://peci.ece.illinois.edu/
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• Contract Date: Feb 8, 2017