DEVICE TO PROVIDE PARALLEL OPERATION OF TRACTION SUBSTATION IN 27.5 KV, 50 HZ TRACTION SYSTEM EXISTING AND BALANCE TRANSFORMERS

摘要

FIELD: railway transport. ^ SUBSTANCE: invention relates to power supply systems of 27.5 kV electrified railroads. Device to provide parallel operation of traction substation with main transformer and traction substation with balancing transformer consists of attachment device with two-phase primary winding, B and C phases of which are interconnected into open delta by node connected with end of phase B of main transformer secondary winding. One output of two-phase primary winding is connected simultaneously with end of phase A, beginning of phase B of secondary winding of main transformer and beginning of phase C of secondary winding of attachment device connected into fork by ends of legs of phases B and C. Other output of two-phase primary winding of attachment device is connected simultaneously with beginning of secondary winding of phase A and with end of phase C of main transformer. Ends of phases B and C of secondary winding of attachment device are connected into common node, and beginning of its phase B is connected to contact system of intersubstation providing turning of voltage vector of main transformer secondary winding through 15°. ^ EFFECT: reduced power losses. ^ 2 dwg