| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress energizing inrush currents of a main transformer in acquiring the electrical power from a stringing. <P>SOLUTION: A breaker 10 is opened in a state in which a pantograph 4 has fallen in a railroad vehicle system. The pantograph 4 is connected to a stringing 1, and the stringing voltage/phase is detected by a voltage/phase detection means 9. Electrical power is supplied from an electrical storage device 17c to a tertiary winding 12c via an electrical power converter (PWM converter) 14c in such a manner that the primary side of a main transformer 6 becomes the stringing voltage/phase detected by the voltage/phase detection means 9, and the main transformer 6 is inversely excited using the tertiary winding 12c. When the voltage of the main transformer 6 has the same phase as the voltage of the stringing 1, the breaker 10 is applied, the pantograph 4 is then raised, and the stringing 1 and the main transformer 6 are connected to each other. The main transformer 6 in which the voltage having the same phase and level as the stringing voltage is applied to the primary side is connected to the stringing 1, thereby suppressing the energizing inrush currents of the main transformer 6. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
