Research on the High Railway Power Transmission Line Fault Location Based on Power Remote Automation System

Research purposes: The research used high-speed railway power remote automation system and combined with the fault recording data of box-type substations and 10 kV power distribution stations installed along the railway, solved the problem that railway bureau dispatcher transferred pre-fault and post-fault current, analyzed the faults line and insulated the fault section after interval fault of power transmission line. The system achieves automatic fault isolation and location to improve power supply reliability. Research conclusions:According to the pre-fault and post-fault voltage and current data recorded by the microcomputer protection device and the RTU device of the 10 kV railway distribution station, the fault section of the interval-through line is automatically selected; the fault measurement of the RTU device built in the double-ended box change of the fault section is used. The data accurately calculates the fault distance. The fault distance measurement method effectively eliminates the measurement errors caused by the redundancy of the cable length, the capacitive effect of the cable and the transition resistance, solves the fault location problem of the full cable line, and compresses the fault recovery time of the high-speed railway section continuous line, improves the power supply reliability of the line and ensures the safe operation of the EMU. © 2018, Editorial Department of Journal of Railway Engineering Society. All right reserved.