POWER SUPPLY SYSTEM FOR AN ELECTRIC RAIL CAR HAVING FUNCTION FOR STABILIZING VOLTAGE OF A WIRE

摘要

PURPOSE: A power supply system for an electric rail car having function for stabilizing voltage of a wire is provided to save manufacturing costs by forming a system supplying AC current for driving the electric rail car by using a scott transformer and an auto-transformer. CONSTITUTION: A scott transformer(11) receives AC voltage of 154KV from a power system, change it into AC voltage of 55KV, and then supplies it to an M and T phase. An autotransformer(AT) is connected to the scott transformer to compensate voltage drop. The autotransformer changes the AC voltage of 55KV into 27.5KV and supplies it to the electric rail car. The scott transformer and autotransformer are installed within A transformer substation(12). The autotransformer is installed in a SSP(Sub-Sectioning Post) or an SP(Sectioning Post).