Study on Internal Heat Transfer Characteristics of Converter Transformer Under OFAF Cooling Mode

YANG Chen; LIU Zhiyuan; LI Zaoyang; LIU Lijun

doi:10.13296/j.1001-1609.hva.2025.03.013

您当前的位置：

首页 >

文章列表页 >

Study on Internal Heat Transfer Characteristics of Converter Transformer Under OFAF Cooling Mode

Research & Analysis | 更新时间：2025-05-25

- Study on Internal Heat Transfer Characteristics of Converter Transformer Under OFAF Cooling Mode
- High Voltage Apparatus Vol. 61, Issue 3, Pages: 112-118(2025)
- 作者机构：
  
  1.国网宁夏电力有限公司超高压公司，银川　 750000
  2.西安交通大学能源与动力工程学院，西安　 710049
- 作者简介：
- 基金信息：
  
  Natural Science Foundation of Ningxia(2021AAC03506)
- DOI：10.13296/j.1001-1609.hva.2025.03.013
  CLC：
- Received：12 September 2024，
  
  Revised：15 December 2024，
  
  Published：16 March 2025
- 稿件说明：
移动端阅览
YANG Chen, LIU Zhiyuan, LI Zaoyang, et al. Study on Internal Heat Transfer Characteristics of Converter Transformer Under OFAF Cooling Mode[J]. High voltage apparatus, 2025, 61(3): 112-118.
DOI：

YANG Chen, LIU Zhiyuan, LI Zaoyang, et al. Study on Internal Heat Transfer Characteristics of Converter Transformer Under OFAF Cooling Mode[J]. High voltage apparatus, 2025, 61(3): 112-118. DOI： 10.13296/j.1001-1609.hva.2025.03.013.

摘要

随着换流变压器额定负荷的增加，其内部绕组的散热问题愈来愈受到重视。文中针对某北方高压直流输电换流站内换流变压器，研究了OFAF（强迫油循环风冷）冷却方式下进口油流量，进口油温等因素对变压器内部流动传热的影响规律，提出了能够强化传热的导流板设计方案。研究结果表明，进口油温20 ℃时，使内部散热效果达到最佳状态的最小冷却油流量为7.5 kg/s；进口油温升高会引起冷却油粘度大幅降低，使得绕组内部相对温升反而降低；增加导流挡板能够有效强化变压器内部传热，导流板完全封闭时在额定工况下可以使顶油温度下降约9 ℃。研究结果对于指导换流变压器的设计与运维具有重要的意义。

Abstract

With the increase of rated load of converter transformer

the heat dissipation of its internal winding has attracted more and more attention. Aiming at the converter transformer at a HVDC converter station in the north of China

the influence of inlet oil flow

inlet oil temperature and other factors on the internal flow and heat transfer of the transformer under OFAF (oil forced air forced) cooling mode is studied

and the design scheme of deflector which can enhance the heat transfer is proposed. The study results show that when the inlet oil temperature is 20 ℃

the minimum cooling oil flow to achieve the best internal heat dissipation effect is 7.5 kg/s. The increase of inlet oil temperature will greatly reduce the viscosity of cooling oil

which will reduce the relative temperature rise inside the winding. Addition of the deflector can effectively strengthen the internal heat transfer of the transformer. When the deflector is completely closed

the top oil temperature can be reduced by about 9 ℃ under rated working conditions. The study results are of great significance to guide the design

operation and maintenance of converter transformer.

关键词

Keywords

references

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Research and Analysis on Harmonic Current Switching Test Technology of Vacuum Type On-load Tap-changer for Converter Transformer

Intelligent Diagnosis Technology of Mechanical State of Converter Transformer Based on Proportion of Wavelet Energy

Condition Assessment Method of Convert Transformer Based on Bullseye Proximity Degree

Research and Analysis on Explosion-proof Test of Converter Transformer OLTC

CALCULATION OF TOTAL SERVICE LOAD-LOSS FOR HVDC CONVERTER TRANSFORMER

Related Author

FAN Guangwei

DENG Jun

WANG Peiren

ZHOU Haibin

XIE Zhicheng

ZHANG Changhong

WU Shuyu

LI Yingbin

Related Institution

Xi’an High Voltage Apparatus Research Institute Co., Ltd.

Electric Power Research Institute of EHV Power Transmission Company of China Southern Power Grid Co

State Key Lab of Electrical Insulation and Power Equipment, Xi'an Jiaotong University

Inner Mongolia Electric Power (Group) Corporation, Ltd. Inner Mongolia Ultra High Voltage Power Supply Corporation

Sichuan Energy Internet Research Institute, Tsinghua University

⁰