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Impact of Transformer Topology on Short-Circuit Analysis in Distribution Systems with Inverter-Based Distributed Generations

Author

Listed:
  • Namhun Cho

    (Korea Electric Power Research Institute, Daejeon 34056, Korea)

  • Myungseok Yoon

    (School of Electric Engineering, Korea University, Seoul 02841, Korea)

  • Sungyun Choi

    (School of Electric Engineering, Korea University, Seoul 02841, Korea)

Abstract

Distributed energy resources (DERs), recently introduced into distribution systems, are mainly inverter-based distributed generations (IBDGs), which have different short-circuit behaviors from conventional synchronous-based distributed generations (SBDGs). Hence, this study presents a comprehensive analysis of the short-circuit behaviors of distribution systems with IBDGs, based on sequence networks and superposition, from the perspectives of interconnected transformers, and observes the flow of zero-sequence fault currents with different transformer topologies. Moreover, two- and three-winding transformers with various bank connection types and groundings are investigated. It was concluded that the transformer topology and its grounding influence the fault current contribution in zero-sequence networks, and the high penetration of IBDGs alters the fault current magnitude and phase angles.

Suggested Citation

  • Namhun Cho & Myungseok Yoon & Sungyun Choi, 2022. "Impact of Transformer Topology on Short-Circuit Analysis in Distribution Systems with Inverter-Based Distributed Generations," Sustainability, MDPI, vol. 14(15), pages 1-23, August.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:15:p:9781-:d:883127
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    References listed on IDEAS

    as
    1. Cho, Namhun & Yun, Sangwon & Jung, Jaesung, 2020. "Shunt fault analysis methodology for power distribution networks with inverter-based distributed energy resources of the Korea Electric Power Corporation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 133(C).
    2. Bayer, Benjamin & Matschoss, Patrick & Thomas, Heiko & Marian, Adela, 2018. "The German experience with integrating photovoltaic systems into the low-voltage grids," Renewable Energy, Elsevier, vol. 119(C), pages 129-141.
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