Transformer Magnetic Field-circuit-force Digital Model During Reclosing and Configuration Study

WANG Qian; REN Zhigang; TENG Jingzhu; ZHAO Yuchen; WANG Le; YAO Yufei; ZHU Jianhao; TENG Fuyun; YAO Jiaxin; WANG Liang; ZHANG Zikang; WANG Xinyu

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Transformer Magnetic Field-circuit-force Digital Model During Reclosing and Configuration Study

更新时间：2025-06-18

- Transformer Magnetic Field-circuit-force Digital Model During Reclosing and Configuration Study
- High Voltage Apparatus Pages: 1-6(2025)
- 作者机构：
  
  1.国网北京市电力公司电科院，北京　 100075
  2.华北电力大学河北省输变电设备安全防御重点实验室，河北　保定　 071003
- 作者简介：
- 基金信息：
  
  Science and Technology Project of SGCC(SGTYHT/21-JS-223)
- DOI：
  CLC：
- Published：
- 稿件说明：
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WANG Qian, REN Zhigang, TENG Jingzhu, et al. Transformer Magnetic Field-circuit-force Digital Model During Reclosing and Configuration Study[J/OL]. High voltage apparatus, 2025, 1-6.
DOI：

WANG Qian, REN Zhigang, TENG Jingzhu, et al. Transformer Magnetic Field-circuit-force Digital Model During Reclosing and Configuration Study[J/OL]. High voltage apparatus, 2025, 1-6. DOI：

摘要

为研究电力系统永久性短路故障重合闸失败造成二次冲击的系统故障问题，文中搭建重合闸短路冲击电路数字模型，计算并对比了一次短路电流和不同合闸角及剩磁作用下的二次短路电流。同时建立了变压器三维磁—路—力有限元仿真模型，获得了漏磁场及电磁力数值分布。结果表明，变压器在永久性短路故障重合闸后二次短路冲击电流会与剩磁激励产生的电流矢量叠加，三相绕组最大短路电流和所受最大电磁力在0°~180°范围内先减小后增大，在90°时达到最小值。并且同一次短路相比，合闸角为90°时轴向电磁力减小40.21%，辐向减小34.30%，减小幅度最大，据此给出了重合闸相关控制策略的建议，具有较高的工程应用价值。

Abstract

To study the system fault problem of secondary impact caused by permanent short-circuit fault reclosing failure

the reclosing short-circuit impulse circuit digital model is built

the primary short-circuit current and the secondary short-circuit current under different reclosing angles and remanence is calculated and compared. At the same time

a three-dimensional magnetic-circuit-force finite element simulation model of the transformer is established

and the numerical distribution of the leakage magnetic field and electromagnetic force is obtained. The results show that the secondary short-circuit impulse current of the transformer will be superimposed with the current vector generated by remanence excitation after the permanent short-circuit fault is reclosed. When reclosing angle range from0 to 180°

the amplitude of impulse current decreases first and then increases

and reaches the minimum value at 90°. Compared with the primary short circuit

when the reclosing angle is 90°

the axial electromagnetic force is reduced by 40.21%

the radial direction is reduced by 34.30%

which is with the largest reduction than at other angles. Based on this

suggestions on the control strategy of reclosing are given

which have high engineering application value.

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references

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