The invention discloses a power supply protection matching method and device for an urban rail power supply system. The method comprises the following steps that a rail voltage and a frame voltage are detected in real time; when the steel rail voltage exceeds a steel rail voltage setting value, the steel rail potential protection device executes a protection action and sends a corresponding action signal to the frame protection device; when the frame voltage exceeds a frame voltage setting value, the frame protection device judges whether an action signal sent by the steel rail potential protection device is received or not, and if the action signal of the steel rail potential protection device is not received, the frame voltage is detected again; and if the frame voltage still exceeds the frame voltage setting value and the action signal of the steel rail potential protection device is not received, the frame protection device executes a protection action. In the method, an action signal of the steel rail potential protection device is added as a judgment condition, so that the occurrence of misoperation of the frame protection device is avoided, and the occurrence of large-area power failure is reduced.
本发明公开了一种用于城轨供电系统的供电保护配合方法及装置,所述方法包括:实时检测钢轨电压和框架电压;当钢轨电压超过钢轨电压整定值时,钢轨电位保护装置执行保护动作,并发送相应的动作信号给框架保护装置;当框架电压超过框架电压整定值时,框架保护装置判断是否接收到钢轨电位保护装置发送的动作信号,若没有接收到钢轨电位保护装置的动作信号,则再次检测框架电压,若框架电压仍然超过框架电压整定值且没有接收到钢轨电位保护装置的动作信号,则框架保护装置执行保护动作。在该方法中,增加了钢轨电位保护装置的动作信号作为判断条件,避免了框架保护装置误动作情况的发生,从而降低大面积停电情况的发生。
Power supply protection matching method and device for urban rail power supply system
用于城轨供电系统的供电保护配合方法及装置
2021-04-06
Patent
Electronic Resource
Chinese
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