电器与能效管理技术 ›› 2023, Vol. 0 ›› Issue (12): 32-38.doi: 10.16628/j.cnki.2095-8188.2023.12.005

• 研究与分析 • 上一篇    下一篇

基于Workbench顺序耦合的中压直流断路器热稳定性仿真分析

黄添晶1, 马子文1, 孔凡良2   

  1. 1.武汉船用电力推进装置研究所, 湖北 武汉 430064
    2.武汉长海电气科技开发有限公司, 湖北 武汉 430064
  • 收稿日期:2023-08-17 出版日期:2023-12-30 发布日期:2024-01-11
  • 通讯作者: 马子文,孔凡良
  • 作者简介:黄添晶(1999—),男,硕士研究生,研究方向为触头系统短时耐受仿真技术。

Simulation Analysis on Thermal Stability of Medium Voltage DC Circuit Breakers Based on Workbench Sequential Coupling

HUANG Tianjing1, MA Ziwen1, KONG Fanliang2   

  1. 1. Wuhan Institute of Marine Electric Propulsion, Wuhan 430064, China
    2. Wuhan Changhai Electrical Technology Development Co., Ltd., Wuhan 430064, China
  • Received:2023-08-17 Online:2023-12-30 Published:2024-01-11
  • Contact: MA Ziwen,KONG Fanliang

摘要:

中压直流断路器是中压直流供配电系统的重要保护装置。基于Workbench建立了中压直流断路器热稳定性顺序耦合仿真模型,在70 kA/250 ms短路电流冲击下,对某型额定电流为6 000 A的中压直流断路器的瞬态温升进行了仿真分析。同时考虑短路电流产生的电动力对导电桥半径的影响,设计了通流过程中导电桥半径迭代变化的计算程序,为中压直流断路器热稳定能力设计提供更加准确的仿真依据。

关键词: 中压直流断路器, Workbench顺序耦合, 热稳定性, 导电桥半径

Abstract:

The medium voltage DC circuit breaker is an important protective device in the medium voltage DC power supply and distribution system. A sequential coupling simulation model for the thermal stability of the medium voltage DC circuit breaker is established based on the Workbench. The transient temperature rise of a certain type of medium voltage DC circuit breaker with a rated current of 6 000 A under 70 kA/250 ms short-circuit current impact is simulated and analyzed. At the same time, considering the influence of the electric force generated by short-circuit current on the radius of the conductive bridge, a calculation program for the iterative change of the radius of the conductive bridge during the current flow process is designed, which can provide a more accurate simulation basis for the design of the thermal stability ability of medium voltage DC circuit breakers.

Key words: medium voltage DC circuit breaker, Workbench sequential coupling, thermal stability, conductive bridge radius

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