Abstract: According to the EMI problem of TWC for signaling system in Beijing urban line S1, this paper analyses and determines the cause of EMI, proposes the corresponding measures of interference suppression. The measures have achieved good effect and guaranteed the stable operation of Beijing urban line S1, and the research and measures have accumulated experiences for the subsequent construction and maintenance of medium and low maglev transit.

Key words: EMI (Electro Magnetic Interference), TWC (Train to Wayside Communication), medium and low speed maglev transit

摘要： 针对北京S1线信号系统车地通信出现的电磁干扰问题，对干扰原因进行分析，确定干扰原因，并提出针对性的抑制措施，取得良好效果，保障北京S1线的平稳运行。研究方法和处理措施，为后续中低速磁浮交通的建设和维护积累经验。

关键词: 电磁干扰, 车地通信, 中低速磁浮交通