A DAB Converter with Common-Point-Connected Winding Transformers Suitable for a Single-Phase 5-Level SST System

Hyeok-Jin Yun, Ho-Sung Kim, Myoungho Kim, Ju-Won Baek and Hee-Je Kim
Additional contact information
Hyeok-Jin Yun: Department of Electrical Engineering, Pusan National University, Busan 46241, Korea
Ho-Sung Kim: Power Conversion and Control Research Center, HVDC Research Division, KERI, Changwon 51543, Korea
Myoungho Kim: Power Conversion and Control Research Center, HVDC Research Division, KERI, Changwon 51543, Korea
Ju-Won Baek: Power Conversion and Control Research Center, HVDC Research Division, KERI, Changwon 51543, Korea
Hee-Je Kim: Department of Electrical Engineering, Pusan National University, Busan 46241, Korea

Energies, 2018, vol. 11, issue 4, 1-16

Abstract: One of the main disadvantages of the multi-level solid-state transformer (SST) system is the voltage imbalance on the output of the rectifier modules. This voltage imbalance can be caused by parameter mismatch of the active and passive components, different loads, and the floating structure of the high voltage DC-links. Some studies have been done to solve this voltage imbalance problem. A common way to avoid this imbalance is to balance the voltage of DC-links at the AC/DC conversion stage and balance the power between the modules at the DC/DC conversion stage. Most of these methods require a complex balancing controller or additional circuits. This paper proposes a novel dual active bridge (DAB) converter specialized in power balancing in a single-phase 5-level SST system. The proposed DAB converter does not require any additional balancing controllers or techniques for power balancing. The performance of the proposed DAB converter was verified by simulation and experiments using a 3 kW 5-level SST prototype system.

Keywords: cascaded H-bridge; dual active bridge; solid-state transformer; power balancing (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.mdpi.com/1996-1073/11/4/928/pdf (application/pdf)
https://www.mdpi.com/1996-1073/11/4/928/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:11:y:2018:i:4:p:928-:d:141016

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().