Structure design of 500 kVA HTS transformer and Joule loss in superconducting windings

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED

Physica C-superconductivity and Its Applications Pub Date : 2024-05-02 DOI:10.1016/j.physc.2024.1354482

Anpeng Shu , Binyi Tian , Shaonan Chang , Yuantong Ma , Wei Pi

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引用次数: 0

Abstract

HTS transformers can provide lower loss and higher efficiency with smaller size and lighter weight compared with traditional transformers. In this paper, we designed a 500 kVA HTS transformer and developed its simulation using finite element software based on the H-formulation, and the simulation incorporates a heat model and E-J power law. The simulation shows that there is a large radial flux leakage at the end of the low-voltage (LV) windings (superconducting windings), leading to a reduction in critical current density and an associated increase in joule loss in the LV winding. In order to reduce joule loss, various LV winding structures were designed. The results demonstrate that either increasing the axial distance between the coils at the LV winding end or installing a flux diverter outside the LV windings can effectively diminish the radial flux leakage at the LV winding end, consequently reducing joule loss in the LV winding. The impact of the size, position and relative permeability of the flux diverter on radial flux leakage and joule loss are also studied. These structure optimizations and the corresponding effects have important significance to the design of HTS transformers.

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500 kVA HTS 变压器的结构设计和超导绕组的焦耳损耗

与传统变压器相比，HTS 变压器能以更小的尺寸和更轻的重量提供更低的损耗和更高的效率。本文设计了一台 500 kVA 的 HTS 变压器，并使用基于 H 公式的有限元软件对其进行了仿真，仿真结合了热模型和 E-J 功率定律。仿真结果表明，低压绕组（超导绕组）末端存在大量径向漏磁通，导致临界电流密度降低，低压绕组的焦耳损耗随之增加。为了减少焦耳损耗，我们设计了各种低压绕组结构。结果表明，增加低压绕组端部线圈之间的轴向距离或在低压绕组外安装磁通分流器，都能有效减少低压绕组端部的径向磁通泄漏，从而降低低压绕组中的焦耳损耗。此外，还研究了磁通分流器的尺寸、位置和相对磁导率对径向磁通泄漏和焦耳损耗的影响。这些结构优化和相应的影响对 HTS 变压器的设计具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physica C-superconductivity and Its Applications 物理-物理：应用

CiteScore

2.70

自引率

11.80%

发文量

102

审稿时长

66 days

期刊介绍： Physica C (Superconductivity and its Applications) publishes peer-reviewed papers on novel developments in the field of superconductivity. Topics include discovery of new superconducting materials and elucidation of their mechanisms, physics of vortex matter, enhancement of critical properties of superconductors, identification of novel properties and processing methods that improve their performance and promote new routes to applications of superconductivity. The main goal of the journal is to publish: 1. Papers that substantially increase the understanding of the fundamental aspects and mechanisms of superconductivity and vortex matter through theoretical and experimental methods. 2. Papers that report on novel physical properties and processing of materials that substantially enhance their critical performance. 3. Papers that promote new or improved routes to applications of superconductivity and/or superconducting materials, and proof-of-concept novel proto-type superconducting devices. The editors of the journal will select papers that are well written and based on thorough research that provide truly novel insights.