Power supply protection cooperation method and device for urban rail power supply system

Abstract

The invention discloses a power supply protection cooperation method and device for an urban rail power supply system. The method includes: real-time detection of rail voltage and frame voltage; when the rail voltage exceeds the rail voltage setting value, the rail potential protection device performs a protection action , and send the corresponding action signal to the frame protection device; when the frame voltage exceeds the frame voltage setting value, the frame protection device judges whether it has received the action signal sent by the rail potential protection device, if it has not received the action signal of the rail potential protection device, Then detect the frame voltage again. If the frame voltage still exceeds the frame voltage setting value and does not receive the action signal of the rail potential protection device, the frame protection device will perform a protection action. In this method, the action signal of the rail potential protection device is added as a judgment condition, which avoids the occurrence of misoperation of the frame protection device, thereby reducing the occurrence of large-scale power outages.

Description

technical field [0001] The invention relates to the field of urban rail power supply systems, in particular to a power supply protection cooperation method and device for urban rail power supply systems. Background technique [0002] With the rapid development of my country's urban construction, urban rail transit is a green and energy-saving way of travel. At present, urban rail transit mostly adopts DC traction power supply system. The safety and reliability of the power supply system is an important basis for the construction and operation of rail transit. Therefore, multiple power supply protection measures will be set in the urban rail DC traction power supply system. Protection and frame current protection) and rail potential limit protection are responsible for the protection of equipment and people respectively. [0003] Because the voltage detected by the rail potential protection device and the voltage detected by the frame protection device are basically the same...

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, this application provides a power supply protection cooperation method, device and storage medium for urban rail power supply system, which solves the problem that the frame leakage protection device and the rail potential protection device operate independently, which may easily cause the frame leakage protection device to malfunction. Cause large-scale power outages, increase the difficulty of maintenance for the staff, and achieve the purpose of avoiding the malfunction of the frame leakage protection device

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