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The UHV multi-terminal hybrid DC transmission system adopts electronic CT or optical CT to collect the DC current flow, so as to realize the control and protection function of UHV DC transmission system. Due to the complicated operating environment and system operating conditions, it is very easy to cause the DC measurement system to be abnormal. This paper introduces the composition of DC measurement system of multi-terminal hybrid DC transmission system, and analyzes the abnormal situations and countermeasures that may occur in actual operation, so as to provide reference for the design of UHV DC transmission project and the operation and maintenance of DC measurement system of converter station.

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Failure Analysis and Operation and Maintenance Strategy of Ultra-High Voltage Multi-Terminal Hybrid DC Current Measurement System

  • 会议论文

  • 发表日期：

    2026年

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  • Zongzhang Yang,
  • Yurong Song,
  • Jianglong Yu,
  • Liyun Zha,
  • Lei Long

摘要

The UHV multi-terminal hybrid DC transmission system adopts electronic CT or optical CT to collect the DC current flow, so as to realize the control and protection function of UHV DC transmission system. Due to the complicated operating environment and system operating conditions, it is very easy to cause the DC measurement system to be abnormal. This paper introduces the composition of DC measurement system of multi-terminal hybrid DC transmission system, and analyzes the abnormal situations and countermeasures that may occur in actual operation, so as to provide reference for the design of UHV DC transmission project and the operation and maintenance of DC measurement system of converter station.