AUTHOR=He Songming , Zhu Jin , Zeng Qingpeng , Guo Xinming , Yin Jingyuan , Wei Tongzhen 

TITLE=Topology searching algorithm for multi-port hybrid circuit breakers based on graph theory

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 11 - 2023

YEAR=2023

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2023.1171815

DOI=10.3389/fenrg.2023.1171815

ISSN=2296-598X

ABSTRACT=Due to the significant advantages of low cost, integrated multi-port hybrid DC circuit breaker with reduced number of devices have attracted extensive attention for fault blocking in multi-terminal VSC-HVDC system. But the current topology exploration by researchers is random, uncertain and time-consuming. In order to provide more new cost-effective topologies, this paper innovatively proposes a topology searching algorithm for IGBT-type M-HCB, and uses the concept of ‘roadblock’ to simplify adjacency matrix. It can be used to significantly save the time for proposing a new M-HCB topology because viable topologies can be quickly and rigorously carried out from a large number of directed graphs by computer. Performance characteristics of all derived topologies are simultaneously obtained and then a comparison can be easily conducted to meet the needs of actual application scenarios. A three ports M-HCB example-specific application is given, with some detailed output topologies which prove the validity and the feasibility of the proposed method.