Analysis of current characteristics for fault section discrimination in AT power feeding system

초록

Protection of AT(Auto trans fomer) power feeding system - Main protection calculate the impedance from the substation to fault - The impedance magnitude detect within configured the range of protection - The protection system is modified to consider the line impedance from SS(Substation) to SP(Sectioning Post) Problem of AT power feeding system - SP is interconnected with trolley wire and feeder wire of up line and down line - As the up line and down line is not defined clearly, the impedance relays work simultaneously when a fault occurs near the SP. - When high-resistance ground fault, impossible the failure detection In This Paper - High-speed rail AT power feeding system modeling (PSCAD/EMTDC) - Analysis the fault characteristics based on a variety of the type of fault through fault-simulation.