摘要
钢轨电压限制装置/过电压保护器(OVPD)临时性的将钢轨与接地系统连接,保障了人员人身安全,但产生的杂散电流对埋地管道有干扰腐蚀的隐患。从OVPD工作机制、杂散电流干扰机制上进行分析,并就管道受OVPD杂散电流干扰实例进行讨论,得出OVPD为轨道交通杂散电流重要干扰源。研究表明OVPD接地后,管道干扰强度增大1倍,而OVPD站台半径1.5 km外管道受干扰影响较小。
The rail voltage limiting device/over-voltage protector(OVPD)temporarily connects the rail with the grounding system to ensure the personal safety of personnel,but the stray current generated has the potential of interference and corrosion to the buried pipeline.This paper analyzes the working mechanism of OVPD and the interference mechanism of stray current,and discusses the example of pipeline disturbed by OVPD stray current.It is concluded that OVPD is an important interference source of rail to rail stray current.The research results show that after OVPD grounded,the pipeline interference intensity is doubled,and the pipeline 1.5km outside the radius of OVPD platform is less affected by the interference.
作者
李德明
LI Deming(Shanghai Natural Gas Pipeline Network Co.,Ltd.)
出处
《上海煤气》
2021年第1期9-14,共6页
Shanghai Gas
