Abstract
A transformer-less Modular Multilevel DC-DC converter for High Voltage Direct Current (HVDC) applications is proposed in this paper. This topology is suitable for interfacing two HVDC links at different voltage levels using only conventional half bridge submodules. The uniqueness of the proposed converter is in its symmetry in performance in the event of reversal of polarity of one of the DC links. The stable operation of the proposed DC-DC converter is demonstrated by interfacing a voltage sourced converter (VSC) based HVDC with a line commutated converter (LCC) based HVDC. Its bipolar operating capability is shown by reversal of polarity of the LCC based HVDC link. The proposed converter can also be used in the onshore terminal of a platform-less DC collection system for an offshore wind farm and this operation is demonstrated with simulation results. All the necessary simulations for the above configurations are carried out in EMTDC/PSCAD platform.
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.
