Development of Online Monitoring Device of Transformer Bushing Based on Inner Pressure Response

CHEN Ling; SU Changhua; WU Xiaohui; TIAN Yang; LONG Zhenze; LIU Rui

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Development of Online Monitoring Device of Transformer Bushing Based on Inner Pressure Response

更新时间：2025-12-08

- Development of Online Monitoring Device of Transformer Bushing Based on Inner Pressure Response
- Vol. 46, Issue 2, Pages: 569-575(2020)
- 作者机构：
  
  1. 国网四川省电力公司电力科学研究院
  2. 国网四川省电力公司
  3. 国网攀枝花供电公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：29 February 2020，
  
  Published：2020
- 稿件说明：
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CHEN Ling, SU Changhua, WU Xiaohui, et al. Development of Online Monitoring Device of Transformer Bushing Based on Inner Pressure Response[J]. 2020, 46(2): 569-575.
DOI：

CHEN Ling, SU Changhua, WU Xiaohui, et al. Development of Online Monitoring Device of Transformer Bushing Based on Inner Pressure Response[J]. 2020, 46(2): 569-575. DOI：

摘要

由于缺乏有效的在线监测手段

变压器套管内部的放电缺陷不能被及时发现

从而导致套管爆炸的事故时有发生。为了提供有效的在线监测装置以及时发现套管内部的放电缺陷

研究了套管内部特征气体对套管内部压强的影响;研制了基于压强响应的套管在线监测装置;分析了监测装置发现套管内部放电缺陷的灵敏度;利用真型套管的局放试验验证了监测装置的有效性。结果表明:油纸绝缘内部放电缺陷产生的氢气、甲烷和一氧化碳等特征气体能够引起内部压强的显著增加;随着缺陷的发展其内部压强也不断增加;通过监测套管的压强可以有效地发现其内部的缺陷;该在线监测装置对于套管内部初期缺陷的发现具有足够的灵敏度。因此

采用该在线监测装置可以实现油纸绝缘套管的缺陷预警

从而避免爆炸事故的发生。

Abstract

The discharge defects in oil-paper bushing can not be timely discovered due to lack of effective online monitoring method

thus explosion on bushing occasionally occurs. In order to provide an effective online monitoring device to find the discharge defects in oil-paper bushings

we researched the influences of characteristic gases produced in bushing on the inner pressure of bushing

and developed an online monitoring device based on inner pressure response. Moreover

we analyzed the sensitivity of the online device in finding discharge defect

and verified the validity of the online monitoring device by partial discharge（PD） tests performed on real bushing. The results show that characteristic gases such as hydrogen

methane

and carbon monoxide produced by discharge defects of oil-paper insulation can cause significant increase in the internal pressure

and the internal pressure will increase with the development of defects. The method to monitor the pressure of bushing is available to discover discharge defect in busing

and the online monitoring device developed in this paper has sufficient sensitivity to discover initial discharge defect in bushing. Therefore

the on-line monitoring device developed in this paper can be used to realize the defect warning of oil-paper insulating bushing

so as to avoid explosion accident of bushing.

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