Scholarlink

Modular multilevel converter-based high-voltage direct current (MMC-HVDC) transmission systems demonstrate significant potential for integrating large-scale renewable energy sources into modern power grids. A critical operational challenge emerges during DC-side short-circuit faults, particularly pole-to-pole faults, where rapidly escalating fault currents pose substantial risks to system integrity. This study investigates the application of a magnetic saturation-based fault current limiter (SFCL) at converter station terminals as an effective mitigation strategy. Through electromagnetic circuit analysis, the SFCL is characterized as a current-dependent nonlinear inductance element. An integrated system model combining the MMC equivalent circuit with SFCL operational characteristics is developed for fault condition analysis. Numerical computation methods are employed to solve the transient current equations, with validation performed through comparative analysis of simulation platform results. The proposed methodology demonstrates improved computational efficiency while maintaining solution accuracy, providing a practical approach for optimizing SFCL parameters and system protection coordination in HVDC applications.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Calculation of DC Fault Current in HVDC Containing Saturated Core Fault Current Limiter

  • 会议论文

  • 发表日期：

    2026年

查看全文
  • Shaojie Chen,
  • Haofeng Zhang,
  • Yongsheng Xu,
  • Wei Xiao,
  • Bing Luo,
  • Zheng Zhong,
  • Wanting Zhang,
  • Hang Zhou

摘要

Modular multilevel converter-based high-voltage direct current (MMC-HVDC) transmission systems demonstrate significant potential for integrating large-scale renewable energy sources into modern power grids. A critical operational challenge emerges during DC-side short-circuit faults, particularly pole-to-pole faults, where rapidly escalating fault currents pose substantial risks to system integrity. This study investigates the application of a magnetic saturation-based fault current limiter (SFCL) at converter station terminals as an effective mitigation strategy. Through electromagnetic circuit analysis, the SFCL is characterized as a current-dependent nonlinear inductance element. An integrated system model combining the MMC equivalent circuit with SFCL operational characteristics is developed for fault condition analysis. Numerical computation methods are employed to solve the transient current equations, with validation performed through comparative analysis of simulation platform results. The proposed methodology demonstrates improved computational efficiency while maintaining solution accuracy, providing a practical approach for optimizing SFCL parameters and system protection coordination in HVDC applications.