Fault Diagnosis of Large-capacity Transformer After Short-line Short-circuit Current Surge

GE Meng; LIN Shuquan; CHANG Qun; SHANG Zeyu; TAO Anpei

doi:10.13296/j.1001-1609.hva.2019.05.010

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Fault Diagnosis of Large-capacity Transformer After Short-line Short-circuit Current Surge

更新时间：2025-04-26

- Fault Diagnosis of Large-capacity Transformer After Short-line Short-circuit Current Surge
- High VoltageApparatus Vol. 55, Issue 5, Pages: 62-68(2019)
- 作者机构：
  
  1. 国网吉林省电力有限公司吉林供电公司
  2. 国网浙江电力公司杭州供电公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2019.05.010
  CLC： TM407
- Published：2019
- 稿件说明：
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[1]葛猛,蔺树全,常群,尚泽禹,陶安培.近区短路电流冲击后大容量变压器故障诊断[J].高压电器,2019,55(05):62-68.

GE Meng, LIN Shuquan, CHANG Qun, et al. Fault Diagnosis of Large-capacity Transformer After Short-line Short-circuit Current Surge[J]. High voltageapparatus, 2019, 55(5): 62-68.
[1]葛猛,蔺树全,常群,尚泽禹,陶安培.近区短路电流冲击后大容量变压器故障诊断[J].高压电器,2019,55(05):62-68. DOI： 10.13296/j.1001-1609.hva.2019.05.010.

GE Meng, LIN Shuquan, CHANG Qun, et al. Fault Diagnosis of Large-capacity Transformer After Short-line Short-circuit Current Surge[J]. High voltageapparatus, 2019, 55(5): 62-68. DOI： 10.13296/j.1001-1609.hva.2019.05.010.

摘要

文中介绍一起受到近区短路电流冲击的大容量三绕组变压器故障诊断过程

指出变压器内部发生股、匝间短路时

变压器绕组受到冲击电流产生的电应力作用发生移位及变形。油色谱、直流电阻、变比、电容量、绕组变形测试以及空载、短路试验在判断变压器性能方面均有不同作用。尤其是通过比对变压器绕组的电容量历史数据或同型号变压器电容量数据并结合直流电阻及变压比测试数据

可以有效发现变压器绕组移位变形故障。

Abstract

This article describes the process of fault diagnosis of a larg-capacity three-winding transformer that has been impacted by a short-line short-circuit current. It is pointed out that the transformer windings are affected by the electrical stress generated by the inrush current

which causes the transformer to shift and deform

resulting in changes in the capacitance between windings and between windings and the ground. This is compared with the historical data of the transformer capacitance or the capacitance data of the same type of transformer. It can quickly and effectively find the transformer winding displacement deformation failure.

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