Influences of Thermal Characteristic Parameters on Power Transformer’s Hot-spot Temperature and Equivalent Aging

MIN Ying-jie; WU Guang-ning; ZHOU Li-jun; GAO Zong-bao

doi:10.13296/j.1001-1609.hva.2012.02.012

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Influences of Thermal Characteristic Parameters on Power Transformer’s Hot-spot Temperature and Equivalent Aging

更新时间：2025-04-26

- Influences of Thermal Characteristic Parameters on Power Transformer’s Hot-spot Temperature and Equivalent Aging
- High VoltageApparatus Vol. 48, Issue 2, Pages: 50-54(2012)
- 作者机构：
  
  西南交通大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2012.02.012
  CLC： TM411
- Published：2012
- 稿件说明：
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[1]闵英杰,吴广宁,周利军,高宗宝.变压器热点温度和等值老化热特征参数的研究[J].高压电器,2012,48(02):50-54.

MIN Ying-jie, WU Guang-ning, ZHOU Li-jun, et al. Influences of Thermal Characteristic Parameters on Power Transformer’s Hot-spot Temperature and Equivalent Aging[J]. High voltageapparatus, 2012, 48(2): 50-54.
[1]闵英杰,吴广宁,周利军,高宗宝.变压器热点温度和等值老化热特征参数的研究[J].高压电器,2012,48(02):50-54. DOI： 10.13296/j.1001-1609.hva.2012.02.012.

MIN Ying-jie, WU Guang-ning, ZHOU Li-jun, et al. Influences of Thermal Characteristic Parameters on Power Transformer’s Hot-spot Temperature and Equivalent Aging[J]. High voltageapparatus, 2012, 48(2): 50-54. DOI： 10.13296/j.1001-1609.hva.2012.02.012.

摘要

笔者阐述了变压器负载导则IEC 60076-7:2005推荐的内部温升差分方程解法中热特征参数的含义

分析了各热特征参数对计算结果的影响。基于热特征参数均匀分布模型和正态分布模型

运用蒙特卡洛法分析了典型负荷和高负荷下的变压器热点温升最大值和绝缘等值老化时间。结果表明

在典型负荷下热特征参数对计算结果影响较小

采用推荐值能满足估算需求;但是在高负荷下的影响较大

如果需要得到较精确的结果

需进一步确定热特征参数。

Abstract

The thermal characteristic parameters of the internal temperature-rise difference equation method recommended in IEC 60076-7:2005 Loading Guide for Oil-Immersed Power Transformer are elaborated.The influence of each thermal characteristic parameter on calculation results is analyzed.By varying these parameters under various load conditions and by Monte-Carlo simulation with uniform distribution and normal distribution of these variables

the power transformer’s hot-pot temperature and equivalent aging time are calculated

and the influences of the parameters on calculation accuracy are obtained.The results indicate that the influences are small under normal load

and the accuracy of the calculation can meet the estimation need by using recommended values;but the influences are great under heavy load

and the thermal characteristic parameters have to be obtained accurately to improve the calculation accuracy.

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