Cause Analysis of Inaction of the DC Arrester Monitor on the Pole Bus of a Converter Station

XIAO Mian; SHU Long; WU Chuanqi; LI Jinbin; CHEN Jun; MENG Yi; WEN Yaqin

doi:10.13296/j.1001-1609.hva.2026.05.026

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Cause Analysis of Inaction of the DC Arrester Monitor on the Pole Bus of a Converter Station

Technical Discussion | 更新时间：2026-05-13

- Cause Analysis of Inaction of the DC Arrester Monitor on the Pole Bus of a Converter Station
- High Voltage Apparatus Vol. 62, Issue 5, Pages: 218-226(2026)
- 作者机构：
  
  国网湖北省电力有限公司电力科学研究院，武汉 430077
  国家电网有限公司高压电气设备现场试验与评估技术实验室，武汉 430077
  湖北大地杂散电流与能源装备安全野外科学观测研究站，武汉 430077
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.05.026
  CLC：
- Received：10 September 2025，
  
  Revised：2025-11-28，
  
  Published：16 May 2026
- 稿件说明：
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XIAO Mian, SHU Long, WU Chuanqi, et al. Cause Analysis of Inaction of the DC Arrester Monitor on the Pole Bus of a Converter Station[J]. High Voltage Apparatus, 2026, 62(5): 218-226.
DOI：

XIAO Mian, SHU Long, WU Chuanqi, et al. Cause Analysis of Inaction of the DC Arrester Monitor on the Pole Bus of a Converter Station[J]. High Voltage Apparatus, 2026, 62(5): 218-226. DOI： 10.13296/j.1001-1609.hva.2026.05.026.

摘要

监测器串接于金属氧化物避雷器接地端，用于记录避雷器的动作次数以及泄漏电流。标准JB/T 10492—2025和GB/T 24845—2018对监测器在8/20 μs波形下的动作电流做了规定，而对其他冲击电流波形没有做出要求。在实际系统运行中，流过避雷器的电流波形并非都为标准8/20 μs雷电流波形，导致可能存在避雷器监测器不动作情况。文中针对一起换流站极母线直流避雷器监测器不动作的故障案例，逐项开展试验工作，分析监测器不动作原因。试验结果表明：电流波形越长，波头越缓，避雷器监测器的动作电流越大。进一步推论，在本次故障案例中，流经避雷器的电流具有更宽（约6.5 ms）的时长，导致要比规程8/20 μs测试波形更大的电流幅值才能触发监测器动作，且该动作电流很可能大于700 A。

Abstract

The monitor is connected in series to the earth terminal of the metal oxide arrester and is used to record the arrester operation numbers as well as the leakage current. Standards JB/T 10492—2025 and GB/T 24845—2018 specify the operating current of the monitor at the standard 8/20 μs waveform

while no requirements are made for other impulse current waveforms. In actual system operation

the current waveform flowing through the arrester is not always the standard 8/20 μs lightning current waveform

which may lead to inaction of the arrester monitor. In this paper

for the inaction case of a DC arrester monitor on the pole bus of the converter station

the test work is carried out item by item to analyze the causes. The test results show that the longer the current waveform and the gentler the wavefront

the larger the operating current of the arrester monitor. It can be further inferred that in this fault case

the current flowing through the arrester has a longer duration (approximately 6.5 ms)

resulting in the need for a larger current amplitude to trigger the standrad 8/20 μs test waveform

and this operating current is likely to be greater than 700 A.

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references

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