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. (2016). An analytical modeling and estimating losses of power semiconductors in a three-phase dual active bridge converter for MVDC grids.

• 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/
• Additional Information: © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
• Contract Date: Feb 8, 2017