Calculation and Analysis of Hot Spot Temperature in 35 kV Oil-immersed Transformer Windings

LI Xin; XU Xiaogang; DENG Jiangang; HUANG Yangjue; CAI Wei; SHI Lei

doi:10.13296/j.1001-1609.hva.2017.01.024

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Calculation and Analysis of Hot Spot Temperature in 35 kV Oil-immersed Transformer Windings

更新时间：2025-04-26

- Calculation and Analysis of Hot Spot Temperature in 35 kV Oil-immersed Transformer Windings
- High VoltageApparatus Vol. 53, Issue 1, Pages: 144-150(2017)
- 作者机构：
  
  1. 广东电网公司电力科学研究院
  2. 国网电力科学研究院武汉南瑞有限责任公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2017.01.024
  CLC： TM411
- Published：2017
- 稿件说明：
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[1]李鑫,徐晓刚,邓建刚,黄杨珏,蔡伟,施磊.35kV油浸式变压器绕组热点温度计算分析[J].高压电器,2017,53(01):144-150.

LI Xin, XU Xiaogang, DENG Jiangang, et al. Calculation and Analysis of Hot Spot Temperature in 35 kV Oil-immersed Transformer Windings[J]. High VoltageApparatus, 2017, 53(1): 144-150.
[1]李鑫,徐晓刚,邓建刚,黄杨珏,蔡伟,施磊.35kV油浸式变压器绕组热点温度计算分析[J].高压电器,2017,53(01):144-150. DOI： 10.13296/j.1001-1609.hva.2017.01.024.

LI Xin, XU Xiaogang, DENG Jiangang, et al. Calculation and Analysis of Hot Spot Temperature in 35 kV Oil-immersed Transformer Windings[J]. High VoltageApparatus, 2017, 53(1): 144-150. DOI： 10.13296/j.1001-1609.hva.2017.01.024.

摘要

为提高变压器的热模型准确性

在35 kV变压器绕组上布置了基于光纤光栅（fiber bragg grating

FBG）温度传感器的测温系统

实时、精确地获取变压器内部的热点温度

充分掌握了变压器绕组温度的分布情况。通过与传统热模型计算结果进行的对比分析

结果表明:绕组热点出现在距顶端1/4处

且理论计算值平均高于测量结果3.29℃。为准确获取变压器绕组热点温度和热路模型

建议将光纤测温技术推广应用至高电压等级变压器上

以实测数据构建变压器绝缘性能及暂态过载能力的评判依据

充分保证变压器的安全可靠和经济效益。

Abstract

In order to obtain the accurate thermal model for 35 kV transformer

we distributed the fiber bragg grating（FBG）sensors in a 35 kV transformer windings

thus measuring the hot spot temperature real-time and mastering the temperature distribution of the transformer windings. Through the comparison with the calculated results of traditional thermal model

the measuring results indicate that the hot spots appear in 1/4 from the top of the windings

and the average calculated value is 3.29 ℃ higher than the measurement results. To accurately obtain the hot spot temperature and the modified thermal model of transformer

we suggest that the application of the FBG temperature measurement technology for higher voltage transformer when temperature-rise test helps get the accurate thermal characteristics and load capacity of transformer

guaranteeing the reliability and economic operation of transformer to the utmost.

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