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

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