NEW AUTOTRANSFORMER TRACTION POWER SUPPLY SYSTEM EQUIPPED WITH 2X27.5KV OUTDOOR MODULARIZED ELECTRIC APPARATUS IN ELECTRIFIED RAILWAY

摘要

The invention relates to an autotransformer (AT) traction power supply systemequipped with2×27.5kV outdoor modularized electric apparatus, comprising a tractionsubstation located besidean electrified railway, which connects with an up / a down line tractionnetwork at output terminal,a parallel apparatus located in the middle and the end of a feeder in the up /down line tractionnetwork, which functions as parallel power supply, and an over-zone apparatuslocated around aneutral section insulator between feeders of the up / down line tractionnetwork of two adjacenttraction substations, which functions as over-zone power supply. The parallelapparatus connectedwith an AT apparatus is a modularized electric apparatus which comprises fourparallel powersupply units. The AT apparatus comprises four integrated AT substations whichinclude the firstAT transformer, the second AT transformer and an AT modularized electricapparatus. Theinvention has the advantages of covering small area, lower investment, highreliability and highmaintenance.