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The multiport hybrid DC circuit breaker (MP-HDCB) serves as a critical component in the multi-terminal flexible DC grids, enabling efficient and rapid isolation for DC-side faults. Given its direct correlation with system reliability, this paper presents a Markov process-based reliability evaluation method for MP-HDCBs. A hierarchical analysis methodology is introduced, beginning with a comprehensive exposition of the typical topology and operational principles employed in typical MP-HDCB configurations. Subsequently, an analytical reliability model is established through the derivation of Markov state transition matrices, enabling calculation of steady-state operational probabilities. To demonstrate the practical applicability of this approach, a detailed case study examines a three-port MP-HDCB configuration. This study contributes a systematic reliability assessment methodology that supports the design optimization of complex multi-terminal flexible DC grids.

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Reliability Analysis of Multiport Hybrid DC Circuit Breaker for Multi-Terminal DC Grid Based on Markov Process

  • 会议论文

  • 发表日期：

    2026年

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  • Fan Zhang,
  • Shuo Zhang,
  • Guibin Zou,
  • Chengquan Zhang

摘要

The multiport hybrid DC circuit breaker (MP-HDCB) serves as a critical component in the multi-terminal flexible DC grids, enabling efficient and rapid isolation for DC-side faults. Given its direct correlation with system reliability, this paper presents a Markov process-based reliability evaluation method for MP-HDCBs. A hierarchical analysis methodology is introduced, beginning with a comprehensive exposition of the typical topology and operational principles employed in typical MP-HDCB configurations. Subsequently, an analytical reliability model is established through the derivation of Markov state transition matrices, enabling calculation of steady-state operational probabilities. To demonstrate the practical applicability of this approach, a detailed case study examines a three-port MP-HDCB configuration. This study contributes a systematic reliability assessment methodology that supports the design optimization of complex multi-terminal flexible DC grids.