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Analysis of Underground Distribution System Models for Secondary Substations

Author

Listed:
  • Boohyun Shin

    (School of Electrical Engineering, Korea University, Seoul 02841, Republic of Korea
    Distribution Power Laboratory, KEPCO Research Institute, Daejeon 34056, Republic of Korea)

  • Hyeseon Lee

    (Distribution Power Laboratory, KEPCO Research Institute, Daejeon 34056, Republic of Korea)

  • Sungyun Choi

    (School of Electrical Engineering, Korea University, Seoul 02841, Republic of Korea)

Abstract

In Korea, the demand for complete underground installation of power distribution equipment installed on roads and green areas is increasing. In addition, KEPCO is making efforts to build a more reliable system for the underground distribution system. To meet these needs, this paper proposes the S-substation. In the S-substation, an RMU, a large power transformer, and an LV-Board (including ATCB and MCCB) are installed within the underground structure. This paper proposes three models to apply the S-substation to the underground distribution system. Power flow analysis is conducted for each model by simulating a variety of loads and DERs, and the frequency fluctuations are also examined under different distribution system events. An economic analysis is also conducted to select the optimal model. The economic analysis focuses on VOLL and construction costs. Based on power flow and economic analysis, one model is selected, and the underground distribution system that the model is applied is presented.

Suggested Citation

  • Boohyun Shin & Hyeseon Lee & Sungyun Choi, 2024. "Analysis of Underground Distribution System Models for Secondary Substations," Energies, MDPI, vol. 17(17), pages 1-22, August.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:17:p:4345-:d:1467564
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    References listed on IDEAS

    as
    1. Cheng Yang & Yupeng Sun & Yujie Zou & Fei Zheng & Shuangyu Liu & Bochao Zhao & Ming Wu & Haoyang Cui, 2023. "Optimal Power Flow in Distribution Network: A Review on Problem Formulation and Optimization Methods," Energies, MDPI, vol. 16(16), pages 1-42, August.
    2. Marszal-Pomianowska, Anna & Widén, Joakim & Le Dréau, Jérôme & Heiselberg, Per & Bak-Jensen, Birgitte & de Cerio Mendaza, Iker Diaz, 2020. "Operation of power distribution networks with new and flexible loads: A case of existing residential low voltage network," Energy, Elsevier, vol. 202(C).
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