Research On Current Collection Technology Of 200Km/h Rigid Catenary

With the continuous improvement of China’s railway lines,the line speed is gradually concerned by people.The catenary power supply system is one of the key points in the railway system.In order to adapt to the train speed increase,the corresponding catenary power supply system on the line needs to be adjusted or changed.The rigid catenary has a wide application prospect,which has many advantages,such as simple structure,less occupied space,convenient construction,safe and reliable,and high degree of localization.The design of the rigid catenary system in the tunnel will have an impact on the stability and safety of train operation.Therefore,in order to meet the conditions of train speed increase,the rigid suspension catenary scheme matching with it can be considered in the tunnel line.Based on the basic structure of rigid catenary,the current collection technology of 200 km/h rigid catenary is studied in this paper.It mainly includes the following contents:a)The rigid suspension catenary model and the three mass pantograph model considering the shape of collector head are established by using the finite element method.After coupling,the dynamic model of pantograph catenary system is constructed,and the dynamic characteristics such as pantograph catenary contact force,lifting displacement of contact point and vibration acceleration of collector head are compared with the measured line data and relevant standards.The model is verified to be correct.b)Based on the pantograph catenary coupling model,the structural parameters of rigid suspension catenary suitable for 200 km/h are studied in detail,including positioning device selection,rigid catenary span analysis and positioning point stiffness selection,and the influence of structural parameters of rigid suspension catenary on the dynamic characteristics of pantograph catenary is further analyzed.c)From the aspects of pantograph catenary dynamic performance,wear performance and the number of stagger waveforms,the influence of stagger layout on the dynamic performance of rigid catenary is considered.The quality of pantograph catenary current collection is evaluated by the time history curve of contact force and its eigenvalue in time domain.The correlation function algorithm is used to observe the spectrum curve,to further judge the current collection quality of different pull-out value arrangements,and to extract the relevant information of rigid catenary.Combined with the influence of mechanical wear on carbon slide plate,the optimized cross layout scheme of stagger is put forward.d)Based on the orthogonal experimental design method,this thesis studies the parameter design of overlapping section which is suitable for high-speed train operation,obtains the optimal combination parameters through the intuitive analysis method and variance analysis method in the orthogonal experiment,and further studies the transverse spacing of overlapping section on the basis of the optimal combination parameters.In addition,the selection of rigid section insulator and the influence of reduced mass on the dynamic performance of pantograph catenary in special section are studied.The adaptability of the overlap transition and through transition in rigid flexible transition section at speeds of 160 km/h and 200 km/h is studied.The length and height difference of transition section are optimized.In the selection of pantograph,the current collection quality of DSA250 is better.