Theoretical Analysis and Field Treatment of Bolt Heating Along the Edge of Fuel Tank in 220 kV Transformer

ZHANG Yan; ZHANG Yuwei; YANG Minchen; HUANG Jiajun; CAI Lei

doi:10.13296/j.1001-1609.hva.2020.03.037

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Theoretical Analysis and Field Treatment of Bolt Heating Along the Edge of Fuel Tank in 220 kV Transformer

更新时间：2025-04-26

- Theoretical Analysis and Field Treatment of Bolt Heating Along the Edge of Fuel Tank in 220 kV Transformer
- High VoltageApparatus Vol. 56, Issue 3, Pages: 247-252(2020)
- 作者机构：
  
  国网上海市电力公司市南供电公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.03.037
  CLC： TM407
- Published：2020
- 稿件说明：
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[1]张彦,张宇巍,杨旻宸,黄佳骏,蔡磊.220 kV变压器箱沿螺栓发热理论分析和现场处理[J].高压电器,2020,56(03):247-252.

ZHANG Yan, ZHANG Yuwei, YANG Minchen, et al. Theoretical Analysis and Field Treatment of Bolt Heating Along the Edge of Fuel Tank in 220 kV Transformer[J]. High voltageapparatus, 2020, 56(3): 247-252.
[1]张彦,张宇巍,杨旻宸,黄佳骏,蔡磊.220 kV变压器箱沿螺栓发热理论分析和现场处理[J].高压电器,2020,56(03):247-252. DOI： 10.13296/j.1001-1609.hva.2020.03.037.

ZHANG Yan, ZHANG Yuwei, YANG Minchen, et al. Theoretical Analysis and Field Treatment of Bolt Heating Along the Edge of Fuel Tank in 220 kV Transformer[J]. High voltageapparatus, 2020, 56(3): 247-252. DOI： 10.13296/j.1001-1609.hva.2020.03.037.

摘要

为了解决220 kV变压器箱沿螺栓异常发热问题

先分析红外跟踪数据并总结箱沿螺栓的发热特点

从理论上推导变压器漏磁在箱沿螺栓上产生的涡流损耗数学表达式

根据表达式得出螺栓发热的3个特点

然后根据分析结果

依次采用螺栓替换和加装短接铜排的方法进行处理

结果表明

该法实用性强

能有效消除变压器箱沿螺栓异常发热隐患。

Abstract

In order to solve the problem which part of bolts along the edge of fuel tank were abnormal heat in 220 kV transformer

the data of infrared lock-on was analyzed and the heating characteristics of the bolts were summarized firstly.Then the mathematical expression of the eddy current loss generated by the magnetic flux leakage of transformer on the bolts along the edge of fuel tank was deduced theoretically.According to the mathematical expression

the three heating characteristics of bolt were obtained.With the result

the bolt replacement and installation of the short connection were used in turn to deal with this problem.It showed that the method was practical and could eliminate the abnormal heating hazard of bolts along the edge of transformer fuel tank.

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