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The voltage source converter based high voltage direct current (VSC-HVDC) is widely used in large-scale grid-connected renewable energy and interconnection of power grids. However, as the installed capacity of traditional synchronous generators decreases, the inertia effect gradually weakens. To this end, a dynamic model of VSC-HVDC is established, and the main factors affecting the grid-connected stability and inertia effect are analyzed through the static synchronous generator model. The results show that the inertia effect of VSC-HVDC is jointly affected by the DC capacitance, system capacity and DC voltage (DCV) reference value. In addition, the PI controller of the DCV control can adjust the damping and synchronization capabilities of VSC-HVDC. The simulation results verify the validity of the research.

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Grid-Connected Stability Analysis and Inertia Effect for VSC-HVDC Based on Power Control

  • 会议论文

  • 发表日期：

    2025年

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  • Liancheng Xiu,
  • Kaihong Li,
  • Kanjun Zhang,
  • Longen Zhang,
  • Ting Wang

摘要

The voltage source converter based high voltage direct current (VSC-HVDC) is widely used in large-scale grid-connected renewable energy and interconnection of power grids. However, as the installed capacity of traditional synchronous generators decreases, the inertia effect gradually weakens. To this end, a dynamic model of VSC-HVDC is established, and the main factors affecting the grid-connected stability and inertia effect are analyzed through the static synchronous generator model. The results show that the inertia effect of VSC-HVDC is jointly affected by the DC capacitance, system capacity and DC voltage (DCV) reference value. In addition, the PI controller of the DCV control can adjust the damping and synchronization capabilities of VSC-HVDC. The simulation results verify the validity of the research.