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介绍了南京地铁2号线、1号线南延线地铁直流牵引供电系统框架泄漏保护的工作原理。通过对牵引变电所整流器独立设置一套框架泄漏保护装置,可以缩小整流器故障时框架泄漏保护动作的影响范围,提高直流牵引供电系统运行的可靠性和灵活性。同时对运行方式进行相应的调整,减少对正常运营的影响。
The working principle of frame leakage protection for DC traction power supply system of Nanjing Metro Line 2 and Line 1 South Extension Line is introduced. By setting a set of frame leakage protection device independently for the rectifier of the traction substation, the influence range of the frame leakage protection action during rectifier fault can be narrowed, and the reliability and flexibility of the DC traction power supply system can be improved. At the same time, the operating mode should be adjusted accordingly to reduce the impact on the normal operation.