Fault Treatment and Analysis of Abnormal Noise in A 110 kV Transformer

Huang Xiaofeng; Zhou Wang; Wang Xinyang; Du Yi; Yin Long

doi:10.13882/j.cnki.ncdqh.2606F033

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Fault Treatment and Analysis of Abnormal Noise in A 110 kV Transformer

更新时间：2026-10-07

- Fault Treatment and Analysis of Abnormal Noise in A 110 kV Transformer
- Rural Electrification Issue 9, Pages: 57-61(2026)
- 作者机构：
  
  国网浙江省电力有限公司金华供电公司,浙江,金华,321017
- 作者简介：
- 基金信息：
- DOI：10.13882/j.cnki.ncdqh.2606F033
  CLC： TM411
- Published：2026
- 稿件说明：
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黄晓峰, 周旺, 王欣扬, 杜羿, 尹龙. 一起110 kV变压器运行异响故障处理与分析[J]. 农村电气化, 2026, (9): 57-61.

Huang Xiaofeng, Zhou Wang, Wang Xinyang, et al. Fault Treatment and Analysis of Abnormal Noise in A 110 kV Transformer[J]. Rural Electrification, 2026, (9): 57-61.
黄晓峰, 周旺, 王欣扬, 杜羿, 尹龙. 一起110 kV变压器运行异响故障处理与分析[J]. 农村电气化, 2026, (9): 57-61. DOI： 10.13882/j.cnki.ncdqh.2606F033.

Huang Xiaofeng, Zhou Wang, Wang Xinyang, et al. Fault Treatment and Analysis of Abnormal Noise in A 110 kV Transformer[J]. Rural Electrification, 2026, (9): 57-61. DOI： 10.13882/j.cnki.ncdqh.2606F033.

摘要

电力变压器是电力系统的核心枢纽设备，其运行可靠性对保证系统的安全稳定至关重要。文章针对一台110 kV变压器运行中发出异常声响的故障案例展开分析，通过油色谱结果初步判断内部存在高能量电弧放电；进一步的油中微水检测与局部放电试验结果为内部绝缘受潮与放电缺陷提供了佐证。设备解体后，在A、C相高压绕组挡油板处发现明确的匝间绝缘烧蚀点，证实了故障性质。本案例揭示了常规试验对部分绝缘缺陷的诊断局限性，为变压器类似潜伏性故障的诊断提供了实践参考。

Abstract

Power transformers are core components of power systems

and their operational reliability is essential to system security and stability. This paper analyzes a case involving abnormal noise from a 110 kV transformer during operation. Dissolved gas analysis initially indicates high-energy arcing inside the transformer. Further measurements of moisture in the insulating oil and partial discharge tests support the diagnosis of moisture ingress into the internal insulation and a discharge defect. Equipment disassembly reveals distinct ablation sites in the interturn insulation at the oil baffles of the phase A and phase C high-voltage windings

confirming the nature of the fault. This case demonstrates the limitations of conventional tests in diagnosing certain insulation defects and provides a practical reference for diagnosing similar latent transformer faults.

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references

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