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Single-Ended Protection Scheme for VSC-Based DC Microgrid Lines

Author

Listed:
  • Cheng Lv

    (Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

  • Xiaodong Zheng

    (Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

  • Nengling Tai

    (Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

  • Shi Chen

    (Power Grid Technology Centre, State Grid Jiangsu Electric Power Company Research Institute, Nanjing 211103, China)

Abstract

With the promotion of distributed energy and direct current (DC) loads, the DC microgrid is able to provide a higher power quality and improve the grid efficiency. Various technical issues in DC microgrids are still to be addressed, particularly a proper protection scheme for fault detection and isolation in DC microgrids utilizing voltage source converters (VSCs). In this paper, the pole-to-pole DC fault transient behavior of the VSC-based microgrids is firstly analyzed with four successive stages, and then the exact requirements for protections are presented. Furthermore, a novel single-ended protection scheme based on local transient signals is proposed, which needs no data transmission or synchronization between two ends, ensuring the speed. A four-terminal DC microgrid model was built in PSCAD/EMTDC. Numerous simulations have demonstrated the validity of the proposed scheme.

Suggested Citation

  • Cheng Lv & Xiaodong Zheng & Nengling Tai & Shi Chen, 2018. "Single-Ended Protection Scheme for VSC-Based DC Microgrid Lines," Energies, MDPI, vol. 11(6), pages 1-17, June.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1440-:d:150515
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    References listed on IDEAS

    as
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