Seismic Response and Horizontal Sliding Analysis of 500 kV Free-standing Power Transformer

HONG Zhihu; ZOU Dexu; ZHOU Fangrong; DAI Weiju; MIN Qingyun; JIN Jinshuai; SHEN Guobiao; ZHANG Zhen; LI Da; YANG Zhou; ZHU Wang

doi:10.13296/j.1001-1609.hva.2026.02.009

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Seismic Response and Horizontal Sliding Analysis of 500 kV Free-standing Power Transformer

Research & Analysis | 更新时间：2026-03-16

- Seismic Response and Horizontal Sliding Analysis of 500 kV Free-standing Power Transformer
- High Voltage Apparatus Vol. 62, Issue 2, Pages: 71-77(2026)
- 作者机构：
  
  云南电网有限责任公司电力科学研究院，昆明 650214
  云南电网有限责任公司文山供电局，云南文山 663000
  云南电网有限责任公司玉溪供电局，云南玉溪 653100
  云南电网有限责任公司怒江供电局，云南怒江 673299
  同济大学土木工程学院，上海 200092
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.02.009
  CLC：
- Received：18 July 2025，
  
  Revised：2025-10-20，
  
  Published：16 February 2026
- 稿件说明：
移动端阅览
HONG Zhihu, ZOU Dexu, ZHOU Fangrong, et al. Seismic Response and Horizontal Sliding Analysis of 500 kV Free-standing Power Transformer[J]. High Voltage Apparatus, 2026, 62(2): 71-77.
DOI：

HONG Zhihu, ZOU Dexu, ZHOU Fangrong, et al. Seismic Response and Horizontal Sliding Analysis of 500 kV Free-standing Power Transformer[J]. High Voltage Apparatus, 2026, 62(2): 71-77. DOI： 10.13296/j.1001-1609.hva.2026.02.009.

摘要

现有对变压器的抗震研究多集中于与基础固接的变压器，对浮放式变压器的抗震性能分析较少。文中选取工程中某500 kV浮放式变压器，文中对该500 kV变压器进行精细化建模，采用考虑变压器出线端耦连回路的抗震性能分析方法，通过有限元时程计算得到变压器关键位置的地震响应数据，分析地震中可能出现破坏的薄弱环节，并分析了变压器整体的水平滑移。结果表明：变压器的前10阶自振模态是高压套管—升高座体系及油枕等部件的一阶平动或扭转模态，自振频率在1～10 Hz范围内，与地震动的卓越频率重合；地震作用下变压器的GIS套管变截面处、油枕支撑根部应力水平较高，存在峰值应力超过材料极限应力的风险，是变压器的抗震薄弱位置。地震作用下浮放变压器产生一定的水平滑移，导致变压器整体位移，在高压出线端结构内产生一定的牵拉应力，致使应力水平增加，加剧结构破坏的可能。

Abstract

Most of the existing research on the seismic performance of transformer is focused on the transformers with fixed connection to the foundation.While the seismic performance analysis of free-standing transformer is less. In this paper

a 500 kV free-standing transformer for a project is selected and a refined modeling for the transformer is carried out. The seismic response data of the key position of the transformer is obtained by using the seismic performance analysis method considering the coupling loop of the transformer outlet. The vulnerable parts that may be damaged in the earthquake is analyzed

and the overall horizontal sliding of the transformer is analyzed. The results show that the first ten natural vibration modes of the transformer are the first order transnational or torsional modes of componens such as the high-voltage bushing-turret system and the oil conservator

and the natural vibration frequency is in the range of 1-10 Hz

which coincides with the excellent frequency of ground motion. The stress level at variable section of GIS bushing and the root of the oil conservator support the transformer is high under seismic condition

has the risk that the peak stress exceeding the material ultimate stress and is the weak positions of the transformer. In seismic cases

the free-standing transformer will produce a certain horizontal slip

resulting in the overall displacement of the transformer

and producing a certain tensile stress in the structure of the high-voltage outgoing terminal

which will increase the stress level and aggravate the possibility of structural damage.

关键词

Keywords

references

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