城市轨道交通专用轨回流系统保护设计分析

Protection Design and Analysis of Return Current Contact Rail for Urban Rail Transit

随着《城市轨道交通工程项目规范》GB55033-2022的实施,将杂散电流防护设计提到了新的高度,并提高了杂散电流的泄漏标准,专用轨回流系统将是轨道交通工程杂散电流防护设计的有效解决方案。本文以宁波轨道交通项目设计为例,对专用轨回流系统的保护设置进行分析,本方案特有的保护设施包括专用轨接地装置和地负单向导通装置,提出将专用轨接地装置与地负单向导通装置合并设置建议。

With the implementation of the Code for Urban Rail Transit Engineering Projects(GB 55033-2022),the stray current protection design has been raised to a new height,and the leakage standard of stray current has been improved.The return current contact rail will be an effective solution for the stray current protection design of rail transit engineering.Taking the design of Ningbo rail transit project as an example,analyzes the protection setting of the return current contact rail system.The special protection facilities of this system include Earthing Device for Return Current Contact Rail and the One-way Conduction Device in Ground and Negative Bus,and puts forward some suggestions on combining this two device.