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介绍北京地铁亦庄线在国内轨道交通工程中首次应用的基于光纤数字通信的直流双边联跳保护方案。阐述方案的回路构成、联跳动作原理,分析方案设计过程中需要重点考虑的环节,并提出具体要求。与传统电缆传输信号的直流双边联跳方案进行综合经济技术比较,表明新方案具有良好的抗干扰性能、数据传输可靠性高,可以适用于任何工程环境。
This paper introduces the DC double-side protection scheme based on optical fiber digital communication which is first applied in the domestic rail transit project of Beijing Yizhuang line. Explain the loop structure of the scheme, the principle of the linkage jump action, and analyze the links that need to be considered in the process of scheme design and put forward the specific requirements. Compared with the traditional double-phase DC link transmission scheme for cable transmission, the comprehensive economic and technological comparison shows that the new scheme has good anti-jamming performance and high reliability of data transmission and can be applied to any engineering environment.