Abstract
Research on control strategy of multi-terminal transmission systems has become the focus of recent power system development. After summarizing various system-level DC voltage control strategies, this paper proposes a new DC voltage control strategy named the distributed DC voltage control strategy. The DC voltage of the multi-terminal transmission systems can be controlled by more than one converter station in the new strategy. Also, it can indirectly control the active power by changing the DC current distribution coefficient of the converter station. To further explain the proposed strategy, the overall control structure, steady-state control and fault control are discussed. Two typical fault simulations on PSCAD/EMTDC are carried out to compare the dynamic characteristics among the master-slave control, the dead-band voltage droop control and the distributed DC voltage control. The result shows that the proposed control strategy has smaller DC overvoltage level, smaller DC current fluctuation and less transient process time during typical faults, and the dynamic response characteristics are better.
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.
