Accuracy improvement of thermal distribution analysis of 10 kV dry-type iron-core reactor

IF 6.4 2区工程技术 Q1 THERMODYNAMICS Case Studies in Thermal Engineering Pub Date : 2024-11-25 DOI:10.1016/j.csite.2024.105554

Caibo Liao, Bang Liu, Kai Li, Wanqing Wang

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Abstract

Hotspot temperature is a key factor affecting the safe operation for power equipment like reactor. The different distribution of the magnetic field in the iron-core and windings results in non-uniform distribution of the electromagnetic losses. However, the influence of non-uniform losses on the temperature distribution is rarely discussed in the previous studies. In this paper, the thermal behavior of 10 kV dry-type iron-core reactor considering the influence of non-uniform losses is studied to obtain more accurate simulation results. First, the winding model with separate coils is used instead of traditional cylinder structure, and the loss of each coil is obtained by equivalent calculation method. Then, the thermal characteristics of reactor with different winding models and loss distributions are analyzed. In addition, the effect of the above factors on windings temperature distribution is discussed. Finally, the simulation results are compared with the test results of 10 kV dry-type reactor in 110 kV indoor substation. The result indicates the simulation result considering the non-uniform losses distribution is closer to the measured result. The temperature distribution of windings in vertical direction is more consistent with the real situation as well.

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10kv干式铁芯电抗器热分布分析精度的提高

热点温度是影响反应堆等电力设备安全运行的关键因素。磁场在铁芯和绕组中的不同分布导致了电磁损耗的不均匀分布。然而，以往的研究很少讨论非均匀损耗对温度分布的影响。本文研究了考虑非均匀损耗影响的10 kV干式铁芯电抗器的热行为，以获得更准确的模拟结果。首先，采用分离线圈的绕组模型代替传统的圆柱结构，通过等效计算方法获得各线圈的损耗；然后，分析了不同绕组模式下电抗器的热特性和损耗分布。此外，还讨论了上述因素对绕组温度分布的影响。最后，将仿真结果与10kv干式电抗器在110kv室内变电站的试验结果进行了比较。结果表明，考虑非均匀损耗分布的模拟结果更接近实测结果。绕组在垂直方向上的温度分布也更符合实际情况。

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.