Dynamic Interaction Study on Double-Pantograph and Rigid-Catenary for AC Traction Power Supply System

With the development of urban rail transit and the installation of rigid catenary in low clearance tunnels during electrification renovations, the dynamic coupling of pantograph catenary in AC rigid contact network system has become a new hot topic. This article studies the coupling characteristics of the pantograph catenary under the operating conditions of dual pantographs. Equivalent AC rigid contact network to Euler Bernoulli beam based on beam theory, the pantograph model is established using three mass blocks, and the dual pantograph catenary model is established using penalty functions. The results show that under the operating condition of the AC rigid catenary, the train speed is inversely proportional to the span of the AC rigid catenary; Among the commonly used spans, a span of 8 or 10 m is suitable for train speeds below 80 km/h, while a span of 6 or 8 m is suitable for train speeds of 80–140 km/h.