In the actual operation, converter transformer valve side bushings are subjected to high voltages and large current loads with large number of harmonics simultaneously. In our previous papers, using the 3‐D electromagnetic‐fluid‐thermal coupling analysis method, the 3‐D temperature distribution of a converter transformer valve side bushing was researched, and the heating and dissipation characteristics of the bushing were analyzed. However, the electric field distribution of the bushing is affected by the temperature gradient inside the bushing. Related researches about the electro‐thermal coupling field of the bushing are rare and most researches are concentrated on the single factor of voltage or temperature. In this paper, by using the electro‐thermal coupling field simulation method proposed in our previous paper, the effect of the core outline size on the electric field distribution of the bushing under a certain temperature gradient was investigated. In addition, by using the transient electric field simulation method, the electric field distribution of the bushing in one cycle subjected to an actual voltage waveform and the current in temperature rise test simultaneously was analyzed considering the effect of the Joule heating power of the core. The proposed method will be able to provide a computation basis for the structure design and optimization of converter transformer valve side bushings. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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换流变压器阀侧衬套的电热耦合场模拟

在实际操作中，变流器变压器阀侧衬套会同时承受高压和大电流负载，并带有大量谐波。在我们以前的论文中，使用3-D电磁-流体-热耦合分析方法，研究了换流变压器阀侧衬套的3D温度分布，并分析了衬套的散热特性。但是，套管的电场分布受套管内部的温度梯度影响。有关套管电热耦合领域的相关研究很少，并且大多数研究集中在电压或温度的单一因素上。在本文中，通过使用我们先前论文中提出的电热耦合场模拟方法，研究了在一定温度梯度下，铁芯外形尺寸对套管电场分布的影响。另外，通过使用瞬态电场模拟方法，考虑了铁心的焦耳热功率的影响，分析了一个套管在实际电压波形和温度上升测试中同时受到电流影响的一个周期内的电场分布。所提出的方法将为换流变压器阀侧衬套的结构设计和优化提供计算依据。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。通过瞬态电场模拟方法，考虑了铁心的焦耳热功率的影响，分析了在实际电压波形和电流同时在温升测试中同时经历一个周期的套管的电场分布。所提出的方法将为换流变压器阀侧衬套的结构设计和优化提供计算依据。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。通过瞬态电场模拟方法，考虑了铁心的焦耳热功率的影响，分析了在实际电压波形和电流同时在温升测试中同时经历一个周期的套管的电场分布。所提出的方法将为换流变压器阀侧衬套的结构设计和优化提供计算依据。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。所提出的方法将为换流变压器阀侧衬套的结构设计和优化提供计算依据。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。所提出的方法将为换流变压器阀侧衬套的结构设计和优化提供计算依据。©2020日本电气工程师学会。由Wiley Periodicals LLC发布。