Simulation And Experimental Study Of High-speed Pantograph-Catenary Coupling System

For a long time,the relationship between the catenary and the pantograph has always been one of the key technologies that limits the development of high-speed railways.The catenary provides not only uninterrupted power to the electric locomotive,but also a taxiing path for the pantograph.Catenary and pantograph are inextricably linked in electrical and mechanical.As a link between the traction power supply system and the high-speed train,the pantograph-catenary coupling system is particularly important for its analysis and research.Only by continuously improving the current receiving quality of the pantograph-catenary system can the safe and reliable operation of the train be guaranteed.In this paper,the research on the relationship between the catenary and the pantograph is mainly through the combination of modeling,simulation and high-speed train comprehensive test.The following aspects have been studied:1)The basic composition and different types of contact nets and pantographs are introduced respectively.Also,using the relevant tests to explain the static elasticity and dynamic characteristics of the catenary and the characteristics of the pantograph.2)Dynamic simulation models are established for the catenary and the pantograph respectively,and were reasonably simplified.The two models are combined in a certain way.The corresponding mathematical model is used to represent the motion law between the two,and the dynamic equations of the pantograph-catenary coupling system are obtained.3)Through programming means,with the powerful open source library of Python language,the program is written to realize the solution of the coupled dynamic equations of the catenary and the pantograph,and the simulation results are obtained.At the same time,the results obtained from the actual test are compared with the simulation results to verify the accuracy of the simulation model.4)Combining simulation results with the results of the Beijing-Tianjin intercity test results,the relationship between the train speed and the contact pressure between the catenary and the pantograph is obtained.At the same time,the train speed,contact pressure and arcing index in the test are cross-checked,and the relationship between the three is found,that is,the speed becomes larger,the standard deviation of contact pressure becomes larger,and the arcing index becomes worse.To a certain extent,the three are interrelated.5)Finally,through the analysis of the simulation results,combined with the characteristics research and experimental experience of the pantograph-catenary system,the suggestions for improving the current receiving quality of the pantograph-catenary are proposed.