Positive rail grounding fault positioning method of fourth rail backflow traction power supply system
A traction power supply system, ground fault technology, applied in the direction of fault location, information technology support system, fault detection according to conductor type, etc., can solve the problems affecting the operation efficiency and safety of the urban rail system, long-term problems, etc., to reduce the fault inspection Time, the effect of improving system operation efficiency and safety
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[0022] The implementation steps of the present invention will be further described below in conjunction with the accompanying drawings.
[0023] The implementation steps of the present invention are firstly to determine whether the fault occurs, secondly to determine the fault section and whether the fault is located in the uplink or downlink, and finally to determine the fault location.
[0024] 1. Judgment of failure
[0025] Since the current of the earth leakage protection device is not affected by the traction load, it is used as the criterion for the failure of the maglev power supply system. In actual engineering, the current threshold can be set (preferably 1A). When the current is less than this threshold, the earth leakage protection device current is considered to be zero. When the current of the ground leakage protection device in the traction substation of the whole line is zero, it can be judged that the system is operating normally; otherwise, it can be judged...
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