Scholarlink

<p>The solid-state power controller (SSPC) is an advanced power management solution that controls and protects electrical systems, and it is increasingly replacing conventional mechanical circuit breakers in the DC power distribution systems of modern transportation, including aircraft and electric vehicles. A critical limitation of SSPCs emerges from unnecessary trips caused by inrush currents when connecting to loads. This study proposes a method to discriminate between fault and inrush currents by predicting load capacitance through resistor–inductor–capacitor equivalent circuit analysis. The proposed method calculates load capacitance from the current slope at the moment SSPC connects to the load through numerical analysis and uses it to estimate the expected inrush current magnitude. During operation, when the measured current during a retry attempt exceeds the predicted inrush current, the system identifies it as fault current and initiates a shutdown. The effectiveness of the proposed method is verified through MATLAB and PSIM simulations and experimental validation with a prototype system.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Method for inrush current discrimination on the basis of an RLC equivalent circuit to improve the safety of solid-state power controllers

  • 期刊论文

  • 发表日期：

    2025年7月3日

查看全文
  • Seon-Woong Kim,
  • Jae-Uk Sim,
  • In-Ho Cho

摘要

The solid-state power controller (SSPC) is an advanced power management solution that controls and protects electrical systems, and it is increasingly replacing conventional mechanical circuit breakers in the DC power distribution systems of modern transportation, including aircraft and electric vehicles. A critical limitation of SSPCs emerges from unnecessary trips caused by inrush currents when connecting to loads. This study proposes a method to discriminate between fault and inrush currents by predicting load capacitance through resistor–inductor–capacitor equivalent circuit analysis. The proposed method calculates load capacitance from the current slope at the moment SSPC connects to the load through numerical analysis and uses it to estimate the expected inrush current magnitude. During operation, when the measured current during a retry attempt exceeds the predicted inrush current, the system identifies it as fault current and initiates a shutdown. The effectiveness of the proposed method is verified through MATLAB and PSIM simulations and experimental validation with a prototype system.