Research on Mechanical Characteristics of Low Frequency Wind Power Transformer Under Short Circuit Impact

WU Peng; LI Jiansheng; LI Xiaohan; WU Yiming; LU Yuncai

doi:10.13296/j.1001-1609.hva.2026.01.011

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Research on Mechanical Characteristics of Low Frequency Wind Power Transformer Under Short Circuit Impact

Research & Analysis | 更新时间：2026-04-13

- Research on Mechanical Characteristics of Low Frequency Wind Power Transformer Under Short Circuit Impact
- High Voltage Apparatus Vol. 62, Issue 1, Pages: 88-94(2026)
- 作者机构：
  
  江苏省电力试验研究院有限公司，南京　211103
  国网江苏省电力有限公司电力科学研究院，南京　211103
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.01.011
  CLC：
- Received：10 July 2025，
  
  Revised：2025-09-23，
  
  Published：16 January 2026
- 稿件说明：
移动端阅览
WU Peng, LI Jiansheng, LI Xiaohan, et al. Research on Mechanical Characteristics of Low Frequency Wind Power Transformer Under Short Circuit Impact[J]. High Voltage Apparatus, 2026, 62(1): 88-94.
DOI：

WU Peng, LI Jiansheng, LI Xiaohan, et al. Research on Mechanical Characteristics of Low Frequency Wind Power Transformer Under Short Circuit Impact[J]. High Voltage Apparatus, 2026, 62(1): 88-94. DOI： 10.13296/j.1001-1609.hva.2026.01.011.

摘要

低频风电变压器是海上风电用柔性低频交流输电系统的关键设备。为进一步了解低频变压器在短路冲击下的振动特性和受力特性，采用镜像法计算变压器绕组漏磁场，并建立了绕组轴向振动的非线性动力学模型，对一台5 000 kVA低频变压器在17 Hz和50 Hz下的短路冲击振动特性和受力进行了分析。研究结果表明，17 Hz下变压器绕组中的短路冲击电流、振动位移、轴向受力和辐向受力均小于50 Hz时的结果，但绕组振动特性基本相同；17 Hz下绕组垫块面积减小32.5%时垫块的最大压缩力应力与50 Hz时相同；17 Hz下绕组的轴向动态压缩力和辐向受力分别为50 Hz下的85.8%和73%。文中结果能为低频变压器结构设计和降低低频变压器生产成本提供重要依据。

Abstract

Low frequency wind power transformer is the key equipment of flexible low frequency AC transmission system for offshore wind power. For understanding the vibration and stress characteristics of low-frequency transformer under short-circuit impact further

the mirror method is used in this paper to calculate the leakage magnetic field of transformer windings

and the nonlinear dynamics model of winding axial vibration is set up and the short circuit impact vibration characteristics and stress of a 5000 kVA low-frequency transformer under 17 Hz and 50 Hz are analyzed. The study results show that the short circuit impulse current

vibration displacement

axial and radial stress in transformer winding at 17 Hz are all less than 50 Hz

however the winding vibration characteristics are basically the same. When the winding spacers is decreased by 32.5% at 17 Hz

the maximum compression stress of the spacers is the same as that at 50 Hz. The dynamic axial compression force and radial stress of winding at 17 Hz are 85.8% and 73% of those at 50 Hz

respectively. The results in this paper can provide an important basis for the structural design of low frequency transformer and the reduction of its production cost.

关键词

Keywords

references

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