Abstract
This study presents a comprehensive review of high-power dc-dc converters for high-voltage direct current (HVDC) transmission systems, with emphasis on the most promising topologies from established and emerging dc-dc converters. In addition, it highlights the key challenges of dc-dc converter scalability to HVDC applications, and narrows down the desired features for high-voltage dc-dc converters, considering both device and system perspectives. Attributes and limitations of each dc-dc converter considered in this study are explained in detail and supported by time-domain simulations. It is found that the front-to-front quasi-two-level operated modular multilevel converter, transition arm modular converter and controlled transition bridge converter offer the best solutions for high-voltage dc-dc converters that do not compromise galvanic isolation and prevention of dc fault propagation within the dc network. Apart from dc fault response, the MMC dc auto transformer and the transformerless hybrid cascaded two-level converter offer the most efficient solutions for tapping and dc voltage matching of multi-terminal HVDC networks.
Original language | English |
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Pages (from-to) | 281-296 |
Number of pages | 16 |
Journal | IET Power Electronics |
Volume | 9 |
Issue number | 2 |
Early online date | 25 Feb 2016 |
DOIs | |
Publication status | Published - 2 Oct 2016 |
Keywords
- autotransformers
- bridge circuits
- DC-DC power convertors
- HVDC power convertors
- HVDC power transmission
- power transformers
- time-domain analysis
ASJC Scopus subject areas
- Electrical and Electronic Engineering