Multi-terminal modular dc-dc converter for dc networks

Abstract

Multi-terminal HV DC-DC converters are required to facilitate future HVDC infrastructure with the ability to interconnect and manage power flow between multiple HVDC networks. Existing topologies offer limited modularity and scalability, making them difficult to implement in the fast-growing HVDC industry. In this disclosure, a multi-terminal modular multilevel converter (MT-MMC) is proposed as the first truly modular multi-terminal HV DC-DC converter. The MT-MMC is made up of multiple subconverters that can be controlled individually with de-centralized controllers, allowing easy reconfiguration of the converter power circuit. The MT-MMC also realizes reductions in semiconductor effort and magnetic requirement when compared with conventional multi-terminal solutions. Case studies are conducted to demonstrate the versatility of the MT-MMC, and a comparative analysis is performed to highlight the advantages of the MT-MMC. Operation and performance of the MT-MMC are verified by simulation.

Dependencies are inferred from the claim text.