Stray current simulation modeling method based on multi-train operation conditions

Abstract

The invention discloses a stray current simulation modeling method based on multi-train operation conditions, and relates to the field of stray current simulation modeling. According to the method, the stray current distribution characteristic is used; a 'steel rail-drainage network-buried metal-ground 'four-layer earth screen structure model conforming to actual subway line characteristics is utilized; a train and a traction substation are regarded as direct-current sources to inject current to the ground together; based on this, a distribution model of the electrical quantity of the earth screen under the action of a single injection source is deduced by using a micro-element method, and then the action results of the injection sources are superposed to obtain the distribution conditionof the electrical quantity on the whole line, so that the whole line stray current and the steel rail potential value obtained by simulation more accord with actual values. The method solves the problems that a traditional stray current distribution model is only driven by a single train and only supplies power to one or two substations, the model structure is simple, boundary conditions are greatly different from actual conditions, and large errors exist between simulation results and measured values.

Description

technical field [0001] The invention relates to the field of stray current simulation modeling, in particular to a stray current simulation modeling method based on multi-train operating conditions. Background technique [0002] With the rapid economic development, my country's urban population has increased significantly and the scale of construction has continued to expand, leading to increasing pressure on urban traffic. Urban rail transit has become the first choice to solve the problem of traffic congestion due to its advantages of high speed, safety, and large passenger capacity. At the same time, during the operation of the subway, due to the inability to achieve complete insulation between the rail and the earth, some direct current flows to the earth through the poor insulation between the rail and the earth, and then flows back from the earth to the traction substation or to the At low potential, this part of the current that flows into the earth and is irregular ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the traditional stray current distribution model is only driven by a single train or powered by only one or two substations, the present invention has the defects of simple model structure and large difference between the boundary conditions and the actual situation, resulting in a discrepancy between the simulation results and the measured values. For the problem of large errors, aiming at the defects of the existing technology, a simulation modeling method of stray current based on multi-train operation conditions is provided

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