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Low-Frequency AC Multiport Asynchronous Grid Connection System to Optimize Generation Costs and Mitigate Bottlenecks

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Listed:
  • Jae-Deok Park

    (Department of Electrical and Control Engineering, Mokpo National University, Muan 58554, Republic of Korea)

  • Jeong-Sik Oh

    (Department of Electrical and Control Engineering, Mokpo National University, Muan 58554, Republic of Korea)

  • Tae-Hun Kim

    (Department of Electrical and Control Engineering, Mokpo National University, Muan 58554, Republic of Korea)

  • Byeong-Hyeon An

    (Department of Electrical and Control Engineering, Mokpo National University, Muan 58554, Republic of Korea)

  • Seung-Yun Lee

    (Department of Electrical and Control Engineering, Mokpo National University, Muan 58554, Republic of Korea)

  • Tae-Sik Park

    (Department of Electrical and Control Engineering, Mokpo National University, Muan 58554, Republic of Korea)

Abstract

Renewable energy sources continue to increase due to the energy transition; thus, the generation output of conventional power sources is decreasing. The installation of renewable energy sources can lead to the concentration of these sources depending on geographical characteristics, which may cause bottlenecks between the renewable energy generation sites and load centers, and such bottlenecks can result in power shortages in load centers and may cause issues that limit the integration of renewable energy. Thus, this paper proposes the application of an LFAC multiport asynchronous grid connection system to solve these problems, where the frequency conversion device uses a variable frequency transformer (VFT). In addition, the installation location of the proposed LFAC multiport asynchronous grid connection system is selected using a grid partitioning technique, and the optimal power flow is performed to minimize the generation costs. The grid partitioning was conducted using the IEEE 39 bus system, and the feasibility of the proposed LFAC multiport asynchronous grid connection system was verified through simulation tests of the generation and load demands in the grid. In addition, the VFT control and optimal power flow control performances were confirmed through MATLAB/Simulink.

Suggested Citation

  • Jae-Deok Park & Jeong-Sik Oh & Tae-Hun Kim & Byeong-Hyeon An & Seung-Yun Lee & Tae-Sik Park, 2024. "Low-Frequency AC Multiport Asynchronous Grid Connection System to Optimize Generation Costs and Mitigate Bottlenecks," Energies, MDPI, vol. 17(24), pages 1-22, December.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:24:p:6317-:d:1544092
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    References listed on IDEAS

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    1. Meng, Yongqing & Yan, Shuhao & Wu, Kang & Ning, Lianhui & Li, Xuan & Wang, Xiuli & Wang, Xifan, 2021. "Comparative economic analysis of low frequency AC transmission system for the integration of large offshore wind farms," Renewable Energy, Elsevier, vol. 179(C), pages 1955-1968.
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