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Parameter Estimation of Chopper Resistor in Medium-Voltage-Direct-Current during Grid Fault Ride through

Author

Listed:
  • Hyeong-Jin Lee

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

  • Jin-Su Kim

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

  • Jae-Chul Kim

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

Abstract

Offshore wind farms with good wind quality are exponentially increasing. To take advantage of this, the offshore wind farms and the grid are connected using the MVDC. In the event of a grid fault, the traditional wind generators and the MVDC are disconnected from the grid fault to protect the devices. However, the wind generators and the MVDC must support the recovery of the grid fault because the disconnection of large capacity wind farms will cause a grid collapse. To prevent this problem, the LVRT requires maintaining the connection between the wind generators and the grid to contribute to the recovery of the grid fault. In this situation, the DC voltage of the MVDC rises due to the unbalanced power of the input and output. Several methods have been proposed to suppress the DC voltage rise of the MVDC. Among various methods, the CR is an effective method to suppress the DC voltage rise of the wind generators and the MVDC. However, the conventional CR designs only consider rated voltage and system capacity. Therefore, this paper proposes the parameter estimation of the CR considering the important factors. The proposed method is verified by PSCAD/EMTDC.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:12:p:3480-:d:190318
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    References listed on IDEAS

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    1. Vandai Le & Xinran Li & Yong Li & Tran Le Thang Dong & Caoquyen Le, 2016. "An Innovative Control Strategy to Improve the Fault Ride-Through Capability of DFIGs Based on Wind Energy Conversion Systems," Energies, MDPI, vol. 9(2), pages 1-23, January.
    2. Xinyin Zhang & Zaijun Wu & Minqiang Hu & Xianyun Li & Ganyun Lv, 2015. "Coordinated Control Strategies of VSC-HVDC-Based Wind Power Systems for Low Voltage Ride Through," Energies, MDPI, vol. 8(7), pages 1-19, July.
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    Cited by:

    1. 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.

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