Dynamic Behavior Characteristic of Pantograph according to Parameter Variation

초록

There are a lot of traffic jams in the metropolitan area and the commuting time has been longer nowadays. So the urban people has been interested in the GTX(Great Train Express) project in Korea. The GTX is the train which runs at 200km/h speed in underground tunnels. The pantograph is the very important equipment that supplies the electrification devices of train with electric power from the contact wire. Unfortunately, as the operational speed of a train increases, the contact force variation of the pantograph also increases. This may lead to a zero contact force between the pantograph and the contact wire, which can results in the loss of contact. If the contact loss happens, the electric arch will happen between pantograph and contact wire and the quality of current collection will be deteriorated. If the train also operates at high speed in tunnel section, the pressure wave will happen and the uplift force of pantograph may vary abruptly. If the rigid trolley bar system is used in tunnel section, it is difficult to improve the commercial speed of train. Therefore it is very important to know the dynamic behavior characteristics of pantograph according to the parameter variation. The pantograph and the contact wire form a dynamic coupled system and they affect each other through the contact force. This paper deals with the dynamic behavior characteristic of pantograph according to the parameter variation.