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A Practical Protection Coordination Strategy Applied to Secondary and Facility Microgrids

Author

Listed:
  • Dae-Geun Jin

    (Power & Industrial System R&D Center, Hyosung Corporation, 74 Simin-daero, Dongan-gu, Anyang, Gyunggi-do 431-080, Korea)

  • Jong-Chan Choi

    (Department of Electrical Engineering, INHA University, 253 Yonghyun-dong, Nam-gu, Incheon 402-751, Korea)

  • Dong-Jun Won

    (Department of Electrical Engineering, INHA University, 253 Yonghyun-dong, Nam-gu, Incheon 402-751, Korea)

  • Hak-Ju Lee

    (Korea Electric Power Research Institute, 105 Munji-ro, Yuseong-gu, Daejeon 305-760, Korea)

  • Woo-Kyu Chae

    (Korea Electric Power Research Institute, 105 Munji-ro, Yuseong-gu, Daejeon 305-760, Korea)

  • Jung-Sung Park

    (Korea Electric Power Research Institute, 105 Munji-ro, Yuseong-gu, Daejeon 305-760, Korea)

Abstract

In a conventional distribution system, protection algorithms are designed to operate on a unidirectional high fault-current level. In a microgrid, a fault current from distributed generation (DG) may bring about a relay malfunction because of the bidirectional and relatively small fault current. Therefore, the conventional protection scheme is not applicable to microgrids and a new protection method must be developed. In this paper, two protection coordination algorithms which can be applied for facility and secondary microgrids are proposed, respectively. The proposed protection algorithms eliminate faults not by the EMS signal but by directional relays. Moreover, this makes the algorithms flexible regardless of the types and numbers of DG. The proposed protection algorithms were simulated at the KEPCO RI Microgrid Demonstration Site.

Suggested Citation

  • Dae-Geun Jin & Jong-Chan Choi & Dong-Jun Won & Hak-Ju Lee & Woo-Kyu Chae & Jung-Sung Park, 2012. "A Practical Protection Coordination Strategy Applied to Secondary and Facility Microgrids," Energies, MDPI, vol. 5(9), pages 1-18, August.
    • Handle: RePEc:gam:jeners:v:5:y:2012:i:9:p:3248-3265:d:19778
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    Citations

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    Cited by:

    1. Yijin Li & Jianhua Lin & Geng Niu & Ming Wu & Xuteng Wei, 2021. "A Hilbert–Huang Transform-Based Adaptive Fault Detection and Classification Method for Microgrids," Energies, MDPI, vol. 14(16), pages 1-16, August.
    2. Wookyu Chae & Jung-Hun Lee & Woo-Hyun Kim & Sungwook Hwang & Jun-Oh Kim & Jae-Eon Kim, 2021. "Adaptive Protection Coordination Method Design of Remote Microgrid for Three-Phase Short Circuit Fault," Energies, MDPI, vol. 14(22), pages 1-20, November.
    3. Hosseini, Seyed Amir & Abyaneh, Hossein Askarian & Sadeghi, Seyed Hossein Hesamedin & Razavi, Farzad & Nasiri, Adel, 2016. "An overview of microgrid protection methods and the factors involved," Renewable and Sustainable Energy Reviews, Elsevier, vol. 64(C), pages 174-186.

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