Power supply protection cooperation method and device for urban rail power supply system
A technology for protection devices and power supply systems, applied in emergency protection circuit devices for limiting overcurrent/overvoltage, emergency protection circuit devices, circuit devices, etc., capable of solving power failures, frame leakage protection device malfunctions, and staff maintenance Increase the difficulty of work and other issues to achieve the effect of reducing large-scale power outages and avoiding malfunctions
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Embodiment 1
[0038] In view of the fact that the frame voltage protection may follow the rail potential limit protection to cause malfunction during the actual operation of the urban rail, the embodiment of the present invention provides a power supply protection coordination device for the urban rail power supply system. Please refer to figure 1 The device includes a rail potential protection device and a frame protection device, and the rail potential protection device and the frame protection device are connected by communication, so that the frame protection device can receive in real time whether the rail potential protection device has an action signal.
[0039]In order to ensure the stability of the system, the communication connection between the rail potential protection device and the frame protection device includes two mutually redundant communication transmission channels, so that when one of the communication transmission channels fails, the other communication transmission cha...
Embodiment 2
[0058] Please refer to figure 1 , 2 , the embodiment of the present invention provides a power supply protection cooperation method for urban rail power supply system, the method is applied to the power supply protection cooperation device of the urban rail power supply system, and the power supply protection cooperation device includes a rail potential protection device connected by communication And the frame protection device, the specific structure of the device has been introduced in the first embodiment, and will not be repeated here.
[0059] The methods include:
[0060] The rail potential protection device detects the rail voltage in real time, and the frame protection device detects the frame voltage in real time;
[0061] When the rail voltage exceeds the rail voltage setting value, the rail potential protection device performs a protection action and sends a corresponding action signal to the frame protection device;
[0062] When the frame voltage exceeds the f...
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