Active current-limiting control to handle DC line fault of overhead DC grid

Meng Zhou, Wang Xiang, Wenping Zuo, Weixing Lin, Jinyu Wen, Ruizhang Yang, Binye Ni, Xiaojun Lu

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Abstract

To handle with the DC line faults in a DC grid, this paper proposed an active current-limiting controller for hybrid MMC. With this active current-limiting control strategy, the requirement of interruption current of DCCB will be significantly decreased, and the investment of DC grid will be reduced obviously. Firstly, the control architecture of active current-limiting controller is disclosed. To avoid the overvoltage of submodule capacitors during DC fault, a dynamic limiter for the reference value of the DC current controller is proposed. To decrease the peak of fault current, the feedforward controller of DC voltage is put forward. The decoupling controllability of the AC/DC voltage of hybrid MMC is disclosed. The current-limiting mechanism of the active current-limiting controller is analysis. Then, the validity of the active current-limiting control strategy is verified by RTDS.

Original languageEnglish
Title of host publication2019 10th International Conference on Power Electronics and ECCE Asia
Place of PublicationPiscataway, NJ
Number of pages6
ISBN (Electronic)9788957083130
Publication statusPublished - 15 Aug 2019
Event10th International Conference on Power Electronics - ECCE Asia, ICPE 2019 - ECCE Asia - Busan, Korea, Republic of
Duration: 27 May 201930 May 2019

Conference

Conference10th International Conference on Power Electronics - ECCE Asia, ICPE 2019 - ECCE Asia
CountryKorea, Republic of
CityBusan
Period27/05/1930/05/19

Keywords

  • active current-limiting control
  • DC fault
  • DC grid
  • hybrid MMC

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  • Cite this

    Zhou, M., Xiang, W., Zuo, W., Lin, W., Wen, J., Yang, R., Ni, B., & Lu, X. (2019). Active current-limiting control to handle DC line fault of overhead DC grid. In 2019 10th International Conference on Power Electronics and ECCE Asia [8797284].