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A Dynamic Nonlinear VDCOL Control Strategy Based on the Taylor Expansion of DC Voltages for Suppressing the Subsequent Commutation Failure in HVDC Transmission

Author

Listed:
  • Hongzheng Li

    (Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 540000, China)

  • Kunlun Han

    (Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 540000, China)

  • Shuhao Liu

    (Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 540000, China)

  • Hailin Chen

    (Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 540000, China)

  • Xiongfeng Zhang

    (Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 540000, China)

  • Kangtai Zou

    (Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 540000, China)

Abstract

Subsequent commutation failure in high-voltage DC transmission systems seriously emphasizes the safe and stable operation of power systems. Via analyzing the mechanism of commutation failure and the principle of voltage-dependent current order limiter (VDCOL), this paper proposes a dynamic nonlinear VDCOL control strategy based on the Taylor expansion of DC voltage for suppressing subsequent commutation failure. To solve the problem of fluctuating DC current command value caused by a large drop in DC voltage, this paper constructs a nonlinear VDCOL control that can be dynamically adjusted according to the AC bus voltage level, and Taylor expansion of DC voltage is used to obtain its first-order and second-order differential components. Different scales of differential elements are chosen to predict the DC voltage compensation value while balancing sensitivity and accuracy. The compensated DC voltage, used as the starting voltage of VDCOL, is input to the VDCOL control constructed in this paper to suppress the subsequent commutation failure of the transmission system by reducing the fluctuation of the current command value. Finally, the standard test model of HVDC is established based on the actual parameters, and the simulation results show that the Method proposed in this paper has an effective suppressing effect in the case of single-phase or three-phase faults of different severity and is conducive to the restoration of the system power transmission.

Suggested Citation

  • Hongzheng Li & Kunlun Han & Shuhao Liu & Hailin Chen & Xiongfeng Zhang & Kangtai Zou, 2023. "A Dynamic Nonlinear VDCOL Control Strategy Based on the Taylor Expansion of DC Voltages for Suppressing the Subsequent Commutation Failure in HVDC Transmission," Energies, MDPI, vol. 16(21), pages 1-21, October.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:21:p:7342-:d:1270591
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    References listed on IDEAS

    as
    1. Chao Xiao & Xiaofu Xiong & Jinxin Ouyang & Getu Ma & Di Zheng & Ting Tang, 2018. "A Commutation Failure Suppression Control Method Based on the Controllable Operation Region of Hybrid Dual-Infeed HVDC System," Energies, MDPI, vol. 11(3), pages 1-13, March.
    2. Hongda Cai & Jing Li & Yongzhi Zhou & Yishuang Hu, 2023. "An Adaptive Phase Locked Oscillator to Improve the Performance of Fault Recovery from Commutation Failure in LCC-Based HVDC Systems," Energies, MDPI, vol. 16(14), pages 1-14, July.
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