Research On The Effect On Railway Station Signaling From Traction Power Supply And Integrated Grounding Design In High Speed Railway

With the rapid development of economic, high speed railway has become an inevitable trend for the development of railway transportation. High speed railway in China adopts electric traction technology, puts forward higher requirements for the quickness and the safety of train operation. The increase of train speed will inevitably cause the increase of traction current and rail potential, meantime, this is often the result of the various interferences and influences on signal system. Combined with the simulation of the traction supply and integrated grounding system effect on signaling system are of great importance to optimal design and reduce the electromagnetic interference.This paper analyzes from the perspective of integrated design of traction power supply system and track circuit. Main works are as follows:(1) Firstly, ground unit impedance and mutual impedance of railway%overhead line system、guard wire and links up grounding wire of traction power supply system in Lanxin second line were deduced through the Carson formula and the formula of impedance, providing basic data support for subsequent simulation.(2) In view of the lack of simulation and research on effect on signaling of traction power supply and integrated grounding. This paper on the basis of the high speed railway station typical structure, station factors were abundant brought in parallel traction power supply system, a real station from Lanxin second line was chose, the method of node voltage equations was utilized, the station with interval as a total of15km track circuit and traction power supply system voltage simulation model were established, the potential difference on both ends of the mechanical insulating section was calculated through the Matlab simulation software, contrasted different potential difference in different conditions, and different factors’influences on the potential difference on both ends of the mechanical insulating section were analyzed like locomotive with different operation currents, the different length of transverse connection line in integrated grounding system and so on.(3) Mechanical insulation section as an important part of high speed railway station track circuit, plays a key role of the inspection of train position and the track signal electrical isolation, in view of the frequently burning loss phenomenon of the mechanical insulation section in the siding of high speed railway station, according to different locomotive operation currents, the integrated grounding system of the different length of transverse connection line, the connection of impedance match bond influence on the potential difference on both ends of the mechanical insulating section, a variety of integrated design methods were presented to reduce the potential difference on both ends of the mechanical insulating section and decrease the burning loss of mechanical insulation section, those methods were analyzed and explored.