Scholarlink

Modular multilevel converter high voltage direct current (MMC-HVDC) systems have a bi-directional current limiting problem that cannot be solved by conventional unidirectional fault limiters. This paper proposes a multifunctional bidirectional fast-response DC fault current limiter (MFCL) that integrates bidirectional fault current limiting, accelerated fault interruption. The MFCL operates based on the iron-core desaturation principle and employs a hybrid configuration of fully-controlled and semi-controlled power electronic switches. By coordinating with relay protection signals and DC circuit breakers, MFCL dynamically adjusts its reactance to switch between different operational modes, thereby achieving the aforementioned multifunctional performance. In this paper, the topology of the MFCL is presented, its principle is analyzed, and the electromagnetic model of the proposed MFCL is built and simulated using finite element analysis to test its electromagnetic characteristics under forward and reverse faults. In addition, MMC-HVDC system and system level co-simulations are performed to verify performance of MFCL operating with MMC-HVDC system.

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

A Multifunctional Bidirectional Fast-Response DC Fault Current Limiter

  • 会议论文

  • 发表日期：

    2026年

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

摘要

Modular multilevel converter high voltage direct current (MMC-HVDC) systems have a bi-directional current limiting problem that cannot be solved by conventional unidirectional fault limiters. This paper proposes a multifunctional bidirectional fast-response DC fault current limiter (MFCL) that integrates bidirectional fault current limiting, accelerated fault interruption. The MFCL operates based on the iron-core desaturation principle and employs a hybrid configuration of fully-controlled and semi-controlled power electronic switches. By coordinating with relay protection signals and DC circuit breakers, MFCL dynamically adjusts its reactance to switch between different operational modes, thereby achieving the aforementioned multifunctional performance. In this paper, the topology of the MFCL is presented, its principle is analyzed, and the electromagnetic model of the proposed MFCL is built and simulated using finite element analysis to test its electromagnetic characteristics under forward and reverse faults. In addition, MMC-HVDC system and system level co-simulations are performed to verify performance of MFCL operating with MMC-HVDC system.