DC/DC converters based on hybrid MMC for HVDC grid interconnection

Zeng, Rong and Xu, Lie and Yao, Liangzhong; (2015) DC/DC converters based on hybrid MMC for HVDC grid interconnection. In: 11th IET International Conference on AC and DC Power Transmission. IET, pp. 1-6. ISBN 978-1-84919-982-7

[thumbnail of Zeng-etal-IET-ICACDCPT-2015-DC-DC-converters-based-on-hybrid-MMC-for-HVDC]
Preview
Text (Zeng-etal-IET-ICACDCPT-2015-DC-DC-converters-based-on-hybrid-MMC-for-HVDC)
Zeng_etal_IET_ICACDCPT_2015_DC_DC_converters_based_on_hybrid_MMC_for_HVDC.pdf
Accepted Author Manuscript

Download (833kB)| Preview

    Abstract

    This paper presents a multi-terminal high-power DC/DC converter configuration based on hybrid MMC topology with fault blocking capability for interconnecting HVDC systems. Its main functions include bidirectional power flow, step-up and step-down operation and fault isolation equivalent to a DC circuit breaker. By contrast to the conventional MMC based DC/DC converter, the proposed DC/DC converter with hybrid MMC configuration has the advantage of being able to block the DC/DC converter terminal connecting to faulty DC grid section, while continue operating the other terminals connected to healthy DC grid sections. The proposed DC/DC converter operation is analyzed and its control is described. Simulation results using Matlab/Simulink are presented to demonstrate the robust performance during dc fault conditions.

    ORCID iDs

    Zeng, Rong, Xu, Lie ORCID logoORCID: https://orcid.org/0000-0001-5633-7866 and Yao, Liangzhong;