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The flexible DC converter valve power supply is the core device of power supply to the power module drive board, in which there are a lot of ceramic capacitors to ensure its stable work. However, ceramic capacitors can easily reduce reliability under high voltage and strong field environment, and can cause failure accidents of energy taking board. This study mainly studies the short-circuit failure characteristics and mechanism of ceramic capacitors. Firstly, it analyzes the voltage and temperature factors that are easy to cause the failure of ceramic capacitors in energy taking power supply, and then explores the pollution source of failed ceramic capacitors and analyzes the failure mechanism of ceramic capacitors through microscopic testing. The results show that ceramic capacitors are prone to short-circuit burning under different external environment, which is closely related to material selection. The research in this paper provides reference data for the selection of ceramic capacitors and failure analysis of energy taking power supply, so as to improve the reliability of energy taking power supply.

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Analysis of the Failure Characteristics of Ceramic Capacitors in the Energy Extraction Power Supply of Flexible Converter Valve Under the Action of Voltage and Temperature

  • 会议论文

  • 发表日期：

    2025年

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  • Yansheng Zou,
  • Kai Xiao,
  • Hong Lei,
  • Zhihong Cai,
  • Maolan Peng,
  • Ning Liang,
  • Jianyu Pan

摘要

The flexible DC converter valve power supply is the core device of power supply to the power module drive board, in which there are a lot of ceramic capacitors to ensure its stable work. However, ceramic capacitors can easily reduce reliability under high voltage and strong field environment, and can cause failure accidents of energy taking board. This study mainly studies the short-circuit failure characteristics and mechanism of ceramic capacitors. Firstly, it analyzes the voltage and temperature factors that are easy to cause the failure of ceramic capacitors in energy taking power supply, and then explores the pollution source of failed ceramic capacitors and analyzes the failure mechanism of ceramic capacitors through microscopic testing. The results show that ceramic capacitors are prone to short-circuit burning under different external environment, which is closely related to material selection. The research in this paper provides reference data for the selection of ceramic capacitors and failure analysis of energy taking power supply, so as to improve the reliability of energy taking power supply.