Physical Field Simulation Analysis Of Pantograph-Catenary System’s Arc

With the high speed of electrical train, pantograph-catenary system will appear a series of vibration, so the number of arc burning becomes more and more frequent. Because the arc has a high temperature, it will make contact line and skateboard surface destroyed and the flow of current becomes worse between pantograph and catenary. Reliable contact is the basic guarantee for the current.The main assessment of current quality is the size of the contact resistance, contact pressure, contact temperature, separating rate, and fixed position point of contact wire dynamic lifting about the contact of pantograph-catenary system quality. Now we often use friction and wear between skateboard and contact line to evaluate the operation life of the system. We can take the following measures to reduce arc phenomenon, such as match contact line and the board materials rationally, reduce the vibration of pantograph, ensure reliable pressure between pantograph and catenary system, and improve the production process of contacted line.This thesis studies the impact of arc when the pantograph-catenary system is separated during the electric train works on the railway. The model of pantograph-catenary system’s contacted wire is established by using the nonlinear finite element theory. The temperature field and electromagnetic fields cloud produced by arc are analyzed through the powerful post-processing function of MARC.It concluded the different nodes of temperature change in contacted face and the distribution of the electromagnetic field. It draws a conclusion about a series of temperature change and the change of the electromagnetic field that are brought about by arc through the simulation results. Temperature field gives different nodes the temperature change of the contact line and skateboard. The influence of different material match and the ice is on the skateboard when the arc brings about. It also analyzes temperature change in the different size current and contact pressure. At last, it concludes the electromagnetic field distribution characteristics and numerical value size. In simulation results and previous relative reference comparisons the conclusion are proved to be correct in the simulation models.