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基于磁机械耦合法的高频变压器绕组力学特性计算与分析
Calculation and Analysis of Mechanical Characteristics of High-frequency Transformer Winding Based on Magneto-mechanical Coupled Method
- 高压电器 2025年 页码：1-11
- 作者机构：
1.三峡大学湖北省输电线路工程技术研究中心，湖北 宜昌 443002
2.三峡大学电气与新能源学院，湖北 宜昌 443002
3.国网湖北省电力有限公司宜昌供电公司，湖北 宜昌 443002
4.南方电网科学研究院有限责任公司，广州 510663
- 作者简介：
陈彬（1989—），男，博士，硕士生导师，主要从事电力装备电磁特性模拟与测量技术、新型电工磁性材料综合磁特性模拟与测量技术的研究（E-mail：chenbin@ctgu.edu.cn）。
- 基金信息：国家自然科学基金青年科学基金(52107006);湖北省自然科学基金面上项目(2021CFB149);湖北省教育厅科学技术研究项目(Q20201202)
DOI：
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- 稿件说明：
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陈彬, 陈健, 万妮娜, 等. 基于磁机械耦合法的高频变压器绕组力学特性计算与分析[J/OL]. 高压电器, 2025,1-11.
CHEN Bin, CHEN Jian, WAN Nina, et al. Calculation and Analysis of Mechanical Characteristics of High-frequency Transformer Winding Based on Magneto-mechanical Coupled Method[J/OL]. High voltage apparatus, 2025, 1-11.
摘要
基于大功率高频变压器的磁耦合DC/DC变换器是实现大规模直流源互联、兆瓦级直流电压变换的核心设备，其工作电流较大，在变换器开关器件故障状态下绕组电流激增从而导致高频变压器绕组受力变形问题严重。文中详细分析了IGBT和二极管的开路故障和短路故障类型，采用电路—电磁场—机械场间接耦合有限元方法研究电磁暂态下高频变压器绕组受力变形问题。以一台200 kVA、10 kHz高频变压器为例，首先计算并测量短路条件下高频变压器的短路电压百分比和电抗值，验证仿真模型及其电磁参数设置的有效性；然后通过场—路耦合方法获得16种故障类型下的电流波形、绕组电磁力、总形变量和应力分布。结果表明：故障状态下绕组最大电磁力、最大应力和最大变形量激增，分别达到了145 N、0.624 5 MPa和1.23 μm。文中研究可以为大功率高频变压器的结构设计和故障分析提供依据。
Abstract
Magnetic coupling DC/DC converter based on high-power high-frequency transformer is the core equipment to realize large-scaled DC source interconnection and megawatt DC voltage conversion. Its working current is large
and the winding current surges in the fault state of converter switching devices
which leads to serious stress deformation of high-frequency transformer windings. In this paper
the types of open-circuit faults and short-circuit faults of IGBT and diode are analyzed in detail
and the finite element method of indirect coupling of circuit-electromagnetic field-mechanical field is used to study the stress deformation of high-frequency transformer windings in electromagnetic transient state. Taking a 200 kVA and 10 kHz high-frequency transformer as an example
the short-circuit voltage percentage and reactance value of the high-frequency transformer under short-circuit condition are calculated and measured to verify the effectiveness of the simulation model and its electromagnetic parameter setting. Then
the current waveform
the winding electromagnetic force
the general shape variable and the stress distribution under 16 fault types were obtained by the field-circuit coupling method. The results show that the maximum electromagnetic force
the maximum stress and the maximum deformation of the winding surge up to 145 N
0.624 5 MPa and 1.23 μm
respectively. The research in this paper can provide basis for structural design and fault analysis of high-power high-frequency transformer.
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references
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