城市轨道交通单向导通装置智能消弧研究

摘要

This paper introduces two kinds of arc suppression methods used in track unilateral connecting device:the discharge gap and GTO. The discharge gap arc suppression is influenced by the environment and cannot be controlled precisely, while GTO arc suppression can control breakover, but cannot control shutdown, which results in permanent reverse connection of unilateral connecting device and in poor protection of stray current. By analyzing process and equivalent circuit, a new intelligent arc-suppression device is proposed to fulfill shutdown control of unilateral connecting device and prevention of permanent reverse connection.%介绍轨道交通单向导通装置常用的2种消弧方式：放电间隙消弧和大功率GTO消弧。放电间隙消弧的方式存在受环境影响大，无法精确控制导通的缺点；大功率GTO消弧的方式可以精确控制导通，但是无法可控关断，导致单向导通装置长期反向导通，不利于杂散电流防护。因此，提出一种可控关断GTO智能消弧型单向导通装置，对其触发导通、关断过程及等效电路进行分析，可实现单向导通装置的可控可靠关断，避免单向导通装置长期反向导通，完善设备功能。