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Article Dans Une Revue IEEE Transactions on Power Delivery Année : 2022

Dc-MMC for the interconnection of HVDC grids with different line topologies

Résumé

DC-DC converters are needed for the future development of high voltage direct current (HVDC) grids, as they allow to interconnect lines with different voltages and topologies. The dc-dc converters can increase the grid controllability adding power flow control, voltage regulation and/or fault blocking capability. The dc modular multilevel converter (dc-MMC) is a non-isolated solution proposed to interconnect HVDC systems with the same line topology. This paper proposes a new dc-MMC with a control strategy, which allows the converter to interconnect different line topologies (e.g., rigid bipole connected to a symmetric monopole). The paper presents the different line topologies in HVDC installations. Then, a mathematical model with a variable transformation is proposed for the new dc-dc converter. A control structure is proposed and implemented in Matlab/Simulink using an average arm model and simplified dc grids. The results validate the control in normal operation, fault blocking capability and post-fault scenario (degraded mode).
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Dates et versions

hal-03517031 , version 1 (07-01-2022)

Identifiants

Citer

Daniel Gomez A., Marc Cheah-Mane, Juan David Paez, Florent Morel, Oriol Gomis-Bellmunt, et al.. Dc-MMC for the interconnection of HVDC grids with different line topologies. IEEE Transactions on Power Delivery, 2022, 37 (3), pp.1692 - 1703. ⟨10.1109/TPWRD.2021.3095966⟩. ⟨hal-03517031⟩
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