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A Hybrid MMC Topology with dc Fault Ride-Through Capability for MTDC Transmission System

Author

Listed:
  • Xinhan Meng
  • Ke-Jun Li
  • Zhuodi Wang
  • Wenning Yan
  • Jianguo Zhao

Abstract

This paper proposes a hybrid modular multilevel converter (MMC) topology based on mismatched-cascade mechanism. The blocking conditions of different submodule (SM) structures under dc fault are analyzed and a series double submodule is presented. With series-double submodules and mismatched-cascade submodules, the proposed hybrid MMC can ride-through the dc side short-circuit fault and provide an output voltage with the feature of low harmonic content. This hybrid MMC topology can be used in the VSC based multiterminal dc (VSC-MTDC) transmission system. The dc fault ride-through properties of the new structure and the total harmonic distortion (THD) are analyzed compared with the previous full-bridge and clamp-double architectures. An appropriate fault blocking procedure is presented, and a typical four-terminal dc transmission simulation system is given in the power system simulation software. Finally, simulation of steady-state and dc bipolar short-circuit fault verifies that the MTDC system based on this new hybrid MMC topology is stabilized and can block the dc fault and return the nonfault parts to normal.

Suggested Citation

  • Xinhan Meng & Ke-Jun Li & Zhuodi Wang & Wenning Yan & Jianguo Zhao, 2015. "A Hybrid MMC Topology with dc Fault Ride-Through Capability for MTDC Transmission System," Mathematical Problems in Engineering, Hindawi, vol. 2015, pages 1-11, October.
    • Handle: RePEc:hin:jnlmpe:512471
    DOI: 10.1155/2015/512471
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    Cited by:

    1. Ui-Jin Kim & Seok-Gyu Oh, 2021. "New Sub-Module with Reverse Blocking IGBT for DC Fault Ride-Through in MMC-HVDC System," Energies, MDPI, vol. 14(6), pages 1-17, March.

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