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Enhancement on the Fault Ride through Capability of Power Distribution Systems Linked by Distributed Generation due to the Impedance of Superconducting Fault Current Limiters

Author

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  • Sang-Jae Choi

    (Department of Electrical Engineering, Soongsil University, 369, Sangdo-ro, Dongjak-gu, Seoul 156-743, Korea)

  • Sung-Hun Lim

    (Department of Electrical Engineering, Soongsil University, 369, Sangdo-ro, Dongjak-gu, Seoul 156-743, Korea)

Abstract

Recently, studies on connecting distributed generation (DG) to power distribution systems through DC links have been actively conducted. When a fault in feeder of this power distribution system occurs, a voltage dip can happen in the grid. In order to prevent voltage dips, there are several solutions such as the application of a superconducting fault current limiter (SFCL). If a SFCL with a larger impedance is applied, the voltage dip of the grid is effectively prevented. However, this action can bring about the malfunction or the delayed operation of the over-current relay (OCR) due to the decreased fault current, which causes another problem of protection coordination between the protective relays. On the other hand, if the impedance of the SFCL is too low, excessive reactive power is supplied by the fault ride-through (FRT) regulation and the active power is reduced. This causes an active power imbalance on the DC link and increases the DC link’s voltage. As previous solutions to prevent the rise of DC links’ voltage, the deloading method and the application of a chopper resistor have been suggested. In this paper, a technique called active power tracking control (APTC), was proposed to suppress the rise of DC links’ voltage. Case studies considering the impedance of SFCL in the constructed power distribution system were carried out, and the rise of DC links’ voltage could be effectively suppressed without any significant delay in the operation of the OCR. This study is expected to solve both the voltage dip of the grid and the rise of DC links’ voltage when distributed generation is connected to a grid.

Suggested Citation

  • Sang-Jae Choi & Sung-Hun Lim, 2019. "Enhancement on the Fault Ride through Capability of Power Distribution Systems Linked by Distributed Generation due to the Impedance of Superconducting Fault Current Limiters," Energies, MDPI, vol. 12(24), pages 1-18, December.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:24:p:4810-:d:298956
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    References listed on IDEAS

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    1. Jin, Peng & Li, Yang & Li, Guoqing & Chen, Zhe & Zhai, Xiaojuan, 2017. "Optimized hierarchical power oscillations control for distributed generation under unbalanced conditions," Applied Energy, Elsevier, vol. 194(C), pages 343-352.
    2. Li, Yang & Li, Yahui & Li, Guoqing & Zhao, Dongbo & Chen, Chen, 2018. "Two-stage multi-objective OPF for AC/DC grids with VSC-HVDC: Incorporating decisions analysis into optimization process," Energy, Elsevier, vol. 147(C), pages 286-296.
    3. Hyeong-Jin Lee & Jin-Su Kim & Jae-Chul Kim, 2018. "Parameter Estimation of Chopper Resistor in Medium-Voltage-Direct-Current during Grid Fault Ride through," Energies, MDPI, vol. 11(12), pages 1-14, December.
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    Cited by:

    1. Thai-Thanh Nguyen & Hak-Man Kim & Hyung Suk Yang, 2020. "Impacts of a LVRT Control Strategy of Offshore Wind Farms on the HTS Power Cable," Energies, MDPI, vol. 13(5), pages 1-17, March.
    2. Olga Akhmedova & Anatoliy Soshinov & Farit Gazizov & Svetlana Ilyashenko, 2021. "Development of an Intelligent System for Distance Relay Protection with Adaptive Algorithms for Determining the Operation Setpoints," Energies, MDPI, vol. 14(4), pages 1-20, February.
    3. Yoo-Jung Cho & Sung-Hun Lim, 2022. "Impedance Compensation Method Considering Unbalanced Ground Fault with SFCL in a Power Distribution System," Energies, MDPI, vol. 15(19), pages 1-14, October.

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