Analysis of Load Loss and Winding Hot Spot Temperature of Oil Immersed Distribution Transformer Under Harmonic Current

ZHOU Weihua; WAN Dai; JIANG Hongcheng; YE Huisheng; QI Fei; ZHOU Hengyi; ZHAO Lihua; FENG Zhengsong

doi:10.13296/j.1001-1609.hva.2018.09.021

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Analysis of Load Loss and Winding Hot Spot Temperature of Oil Immersed Distribution Transformer Under Harmonic Current

更新时间：2025-04-26

- Analysis of Load Loss and Winding Hot Spot Temperature of Oil Immersed Distribution Transformer Under Harmonic Current
- High VoltageApparatus Vol. 54, Issue 9, Pages: 135-141(2018)
- 作者机构：
  
  1. 国网湖南省电力公司电力科学研究院
  2. 国网南通供电公司
  3. 四川大学电气信息学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.09.021
  CLC： TM411
- Published：2018
- 稿件说明：
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[1]周卫华,万代,江红成,叶会生,齐飞,周恒逸,赵莉华,冯政松.谐波电流下油浸式配电变压器负载损耗及绕组热点温度分析[J].高压电器,2018,54(09):135-141.

ZHOU Weihua, WAN Dai, JIANG Hongcheng, et al. Analysis of Load Loss and Winding Hot Spot Temperature of Oil Immersed Distribution Transformer Under Harmonic Current[J]. High voltageapparatus, 2018, 54(9): 135-141.
[1]周卫华,万代,江红成,叶会生,齐飞,周恒逸,赵莉华,冯政松.谐波电流下油浸式配电变压器负载损耗及绕组热点温度分析[J].高压电器,2018,54(09):135-141. DOI： 10.13296/j.1001-1609.hva.2018.09.021.

ZHOU Weihua, WAN Dai, JIANG Hongcheng, et al. Analysis of Load Loss and Winding Hot Spot Temperature of Oil Immersed Distribution Transformer Under Harmonic Current[J]. High voltageapparatus, 2018, 54(9): 135-141. DOI： 10.13296/j.1001-1609.hva.2018.09.021.

摘要

为了研究电流畸变情况下油浸式配电变压器负载损耗和绕组热点温度的变化规律

基于IEEE StdC57.110中的绕组涡流谐波损耗因子和杂散谐波损耗因子

并考虑绕组在谐波电流下的集肤效应会增强

定义了绕组电阻谐波损耗因子

从而建立了变压器在谐波电流下负载损耗计算模型。考虑到绕组涡流损耗密度分布不均对绕组热点温度的影响

利用文中所建立的变压器在谐波电流下负载损耗计算模型修正了IEEE Std C57.110:2008的绕组热点温度计算公式。分析结果表明

谐波电流会引起较大的额外负载损耗

谐波畸变率为40%和60%时负载损耗分别增加了近0.5倍和1倍

此时顶层油温和热点温度也有较大增加

顶层油温升和热点温升在畸变率为40%时分别达到了71.6、102.7 K

远超过温升限值。同时发现谐波频率越高

负载损耗和热点温升增加越快。

Abstract

To investigate the variation of load loss and winding hot spot temperature of the oil immersed transformerin the case of current distortion

according to the winding eddy current harmonic loss factor and stray harmonic lossfactor of IEEE Std C57.110

the harmonic loss factor of winding resistance is defined with consideration of the en-hanced skin effect of winding under harmonic current

and a load loss calculation model of the transformer under har-monic current is established. Considering the influence of the eddy current loss density distribution on the windinghot spot temperature

the calculation formula of the winding hot spot temperature in IEEE Std C57.110:2008 is modi-fied by using the proposed load loss calculation model. Analysis results show that: the harmonic current can causelarge additional load loss;the load loss is increased by nearly 0.5 times and 1 time when the harmonic distortion rateis 40% and 60%

respectively

and the top oil temperature and the hot spot temperature are also increased signifi-cantly;the top oil temperature rise and the hot spot temperature rise reach 71.6 K and 102.7 K at the distortion rateof 40%

much higher than the limiting value of temperature rise. In addition

the higher the harmonic frequency

thefaster the increases in the load loss and the hot spot temperature rise.

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