Experimental Research on Mechanical Properties of Copper Wires in Transformer Winding Under Thermal Effects

XU Shurong; LIU Jun; LI Zhongxiang; CHEN Peilong; ZHU Yiqin; ZHONG Hao

doi:10.13296/j.1001-1609.hva.2025.09.012

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Experimental Research on Mechanical Properties of Copper Wires in Transformer Winding Under Thermal Effects

Research & Analysis | 更新时间：2025-09-05

- Experimental Research on Mechanical Properties of Copper Wires in Transformer Winding Under Thermal Effects
- High Voltage Apparatus Vol. 61, Issue 9, Pages: 92-99(2025)
- 作者机构：
  
  1.贵州电网有限责任公司电力科学研究院，贵阳　550002
  2.湖南大学电气与信息工程学院，长沙　410082
  3.特变电工衡阳变压器有限公司，湖南　衡阳　421007
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2025.09.012
  CLC：
- Received：05 September 2024，
  
  Revised：25 December 2024，
  
  Published：16 September 2025
- 稿件说明：
移动端阅览
XU Shurong, LIU Jun, LI Zhongxiang, et al. Experimental Research on Mechanical Properties of Copper Wires in Transformer Winding Under Thermal Effects[J]. High voltage apparatus, 2025, 61(9): 92-99.
DOI：

XU Shurong, LIU Jun, LI Zhongxiang, et al. Experimental Research on Mechanical Properties of Copper Wires in Transformer Winding Under Thermal Effects[J]. High voltage apparatus, 2025, 61(9): 92-99. DOI： 10.13296/j.1001-1609.hva.2025.09.012.

摘要

绕组屈服强度、粘结强度以及轴向弯曲应力是评估变压器抗短路能力的重要指标，文中介绍了屈服强度、粘结强度和轴向固化系数的试验方法和步骤，试验取得了不同尺寸、温度、导线芯数以及出厂年份等多个复杂因素共同作用下的以上3个绕组参数变化的规律和取值范围。同时，文中创新性地分别在常温下和多个温度循环下对变压器铜导线屈服强度和自粘强度进行试验测定，目的是为了探究多次短路冲击下电磁力和温度循环往复对铜导线机械性能的影响，从而为变压器抗短路校核提供参考。

Abstract

The yield strength

bonding strength and axial bending stress of winding are important indicators to assess short-circuit resistance of transformer. In this paper the test methods and steps of yield strength

bonding strength and axial curing coefficient are introduced

and the trend and value ranges of parameters variation of above-menioned three windings under the combined action of different sizes

temperatures

wire cores and delivery year are obtained by the test. At the same time

the yield strength and self-adhesive strength of transformer copper aire at room temperature and multiple temperature cycles are innovatively tested respectively with aim of exploring the influence of electromagnetic force and temperature cycle reciprocating on the mechanical properties of copper wire under multiple short-circuit impacts

thereby providing a reference for short-circuit resistance verification of transformer.

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