基于磁—结构场耦合的干式直流电容器短路特性分析

黎鹏; 邱雨; 岳国华; 杜志叶; 姚成; 刘刚

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基于磁—结构场耦合的干式直流电容器短路特性分析

更新时间：2025-06-18

- 基于磁—结构场耦合的干式直流电容器短路特性分析
- Analysis of Short-circuit Characteristic of Dry-type DC Capacitor Based on Magnetic-structure Field Coupling
- 高压电器 2025年页码：1-9
- 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.武汉大学电气与自动化学院，武汉　 430072
  4.南方电网科学研究院有限责任公司，广州　 510700
- 作者简介：
  
  黎鹏（1989—），男，博士，副教授，研究方向为电工装备电磁多物理场分析、电力设备智能运维等（E-mail：lipeng_ctgu@163.com）。
- 基金信息：
  
  国家自然科学基金(51977152);南方电网科学研究院有限责任公司科技项目(CG1500062001576425)
- DOI：
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- 纸质出版日期：
- 稿件说明：
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黎鹏, 邱雨, 岳国华, 等. 基于磁—结构场耦合的干式直流电容器短路特性分析[J/OL]. 高压电器, 2025,1-9.

LI Peng, QIU Yu, YUE Guohua, et al. Analysis of Short-circuit Characteristic of Dry-type DC Capacitor Based on Magnetic-structure Field Coupling[J/OL]. High voltage apparatus, 2025, 1-9.
黎鹏, 邱雨, 岳国华, 等. 基于磁—结构场耦合的干式直流电容器短路特性分析[J/OL]. 高压电器, 2025,1-9. DOI：

LI Peng, QIU Yu, YUE Guohua, et al. Analysis of Short-circuit Characteristic of Dry-type DC Capacitor Based on Magnetic-structure Field Coupling[J/OL]. High voltage apparatus, 2025, 1-9. DOI：

摘要

干式直流电容器作为柔性直流输电系统中的关键设备，被广泛应用于滤波、电压支撑等重要场合，确保其长期安全可靠地运行具有重要意义。电容器突发外部短路故障时，急剧增加的短路电流流过内部汇流排，从而产生较大的电动力，容易造成电容器结构失效。为研究短路电流冲击下电容器耐受短路电动力的问题，以某型号干式直流电容器为研究对象，基于磁—结构场耦合计算方法，对电容器短路状态时的电动力分布、结构应力以及形变进行计算与分析。结果表明：发生外部短路故障时，电容器内部最大短路电动力数值达10.8 kN；电容器的形变主要出现在引出铜板及其附近区域，且越靠近汇流排中部形变量越大；引出端子呈现明显地向下挤压趋势。研究成果为电容器机械强度校验以及结构优化设计提供理论参考。

Abstract

As a key equipment in flexible DC transmission system

dry-type DC capacitors are widely used in filtering

voltage support and other important occasions. It is of great significance to ensure the long-term secure and reliable operation of dry-type DC capacitors. When an external short-circuit fault suddenly occurs in the capacitor

the internal busbar will flow through a rapidly increased short-circuit current and result in great electrodynamic force

which easily cause structural failure of the capacitor. In order to study the issue of capacitor withstanding short-circuit electrodynamic force under short-circuit current impact

this paper takes a type of dry-type DC capacitor as the research object

then calculates and analyzes the short-circuit electrodynamic force distribution

deformation as well as stress of the capacitor under short-circuit conditions based on calculation method of magnetic-structure field coupling. The results show that when an external short-circuit fault occurs

the maximum electrodynamic force of the capacitor reaches 10.8 kN. The deformation of the capacitor mainly occurs on the leading-out busbar as well as its surrounding areas

and the deformation where approaches the middle part of the busbar is larger. Terminal shows an obvious downward squeezing trend. The research results provide theoretical reference for mechanical strength check and structural optimization design of capacitors.

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references

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