Abstract
Aiming at the problems of large number and large loss of existing modular multilevel converter (MMC) sub-module topology devices with fault blocking capability, the improved dual-half bridge sub-module topology is proposed. The topology can block the fault current path by blocking all pulse signals without changing the original control strategy. In this paper, the DC fault blocking mechanism of the topology is analyzed in detail, and the modulation mode of the system is determined. The device characteristics and loss characteristics of the sub-module are studied and compared with other improved half-bridge topologies. The MMC system based on the proposed sub-module topology was simulated by PSCAD/EMTDC. The results show that the proposed topology has a small number of devices and low operating loss, which can effectively block the fault current.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
