A Coaxial Cable Power Supply System for Electrified Railway

Abstract

A coaxial cable power supply system for electrified railways, consisting of central traction substation, coaxial cable, traction transformer, catenary, rail, circuit breaker, etc.; central traction substation is connected with coaxial cable; coaxial cable and catenary Parallel erection; the traction transformer is single-phase connected and distributed along the coaxial cable and catenary at certain intervals, its primary winding is connected between the inner conductor and outer conductor of the coaxial cable, and the secondary winding is connected to the catenary and catenary Between the rails; through the adjacent traction transformer, the inner conductor of the coaxial cable is connected in parallel with the catenary, and the outer conductor of the coaxial cable is connected in parallel with the rail; the power supply capacity and voltage level of the system of the present invention are mainly determined by the coaxial cable, suitable for coaxial The matching of the axial cable with various voltage levels of the catenary is conducive to the light suspension of the catenary and the improvement of the overall quality; the coaxial cable is erected along the railway or subway tunnel, without occupying additional corridors, which can reduce the interface between the railway and the public grid and save external Power investment, easy to manage.

Description

technical field [0001] The invention relates to a coaxial cable power supply system for an electrified railway, in particular to the field of power frequency single-phase traction power supply for trunk railway transportation and urban rail transit. Background technique [0002] The single-phase system has the advantages of simple structure, low construction cost, convenient operation and maintenance, etc., which determines that the power frequency single-phase AC power from the public power grid is generally used to power trains (traction loads) on electrified railways. In order to distribute the single-phase traction load as evenly as possible in the three-phase public grid, the electrified railway adopts the scheme of alternating phase sequence and split-phase power supply. The adjacent power supply areas at the phase-splitting partitions are divided by phase-splitting insulators to form electrical split phases, also known as phase splits. These phase separations restric...

AI Technical Summary

Problems solved by technology

At the same time, it should also be noticed that while the traction substation implements the same-phase power supply and cancels the phase separation, the negative sequence must be treated at the same time. To what extent there is currently no standard to follow, that is to say, whether bilateral power supply can be implemented remains to be studied

Images