Study on the effect of harmonic action on three-core cable based on electromagnetic-thermal coupling method

WANG Huaibing; ZHANG Rui

doi:10.3969/j.issn.1672-3643.2025.03.005

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Study on the effect of harmonic action on three-core cable based on electromagnetic-thermal coupling method

更新时间：2025-09-24

- Study on the effect of harmonic action on three-core cable based on electromagnetic-thermal coupling method
- Ningxia Electric Power Issue 3, (2025)
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- DOI：10.3969/j.issn.1672-3643.2025.03.005
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- Published Online：27 June 2025，
  
  Published：2025
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WANG Huaibing, ZHANG Rui. Study on the effect of harmonic action on three-core cable based on electromagnetic-thermal coupling method[J]. Ningxia electric power, 2025, (3).
DOI：

WANG Huaibing, ZHANG Rui. Study on the effect of harmonic action on three-core cable based on electromagnetic-thermal coupling method[J]. Ningxia electric power, 2025, (3). DOI： 10.3969/j.issn.1672-3643.2025.03.005.

摘要

为研究谐波对三芯电缆的影响，采用电磁-热耦合法建立有限元模型，通过仿真分析谐波作用下的电缆温升特性。首先，量化谐波导致的电缆损耗变化；然后，构建电磁-热耦合温度计算模型，并通过修正参数提升模型精度；最后，开展不同谐波条件下的温度场仿真。研究结果表明：谐波次数超过19次时，交直流阻比随截面积的变化率降低，且铠装层损耗与谐波次数呈正相关；缆芯温度始终高于表面温度，当谐波含量低于20%时，缆芯温升差异不明显；而当谐波含量超过20%时，温升差异显著增大。该研究为谐波环境下电缆的热性能评估及寿命预测提供了理论依据。

Abstract

In order to analyse the effect of harmonics on three-core cables

the electromagnetic-thermal coupling method is used to establish a finite element model

and the temperature rise characteristics of cables under the effect of harmo nics are analyzed through simulation.First

the cable loss changes due to harmonics are quantified.Then the electro magnetic-thermal coupling temperature calculation model is constructed

and the model accuracy is improved by correcting the parameters.Finally

the temperature field simulation under different harmonic conditions is carried out.The results show that: when the number of harmonics exceeds 19

the change rate of AC/DC resistance ratio with cross-sectional area decreases

and the loss of armor layer is positively correlated with the number of harmonics; the temperature of the cable core is always higher than that of the surface temperature

and the difference of the temperature rise of the cable core is not obvious when the harmonic content is lower than 20%

while the difference of the temperature rise is significantly increased when the harmonic content exceeds 20%.This study can provide a theoretical basis for the thermal performance evaluation and life prediction of cables under harmonic environment.

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Related Institution

EHV Company,State Grid Ningxia Electric Power Co.,Ltd.

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