Abstract
During electric traction of trains, railway automation and Remote control devices, connected to rails or located in close proximity to reverse traction rail network, are affected by overvoltages and overcurrents during emergency processes in a traction network. To develop, basing on mathematical models, of means and systems for protection against overvoltages and overcurrents it is required to work out a model of hazardous electromagnetic impact source at different distances from short circuit spot to traction substation and under various operating conditions. In the article, it has been developed based on state variables method a distributed mathematical model of AC traction network with 25 kV voltage. After computer experiments, it is proposed the replacement of substituion complex scheme for a traction network with equivalent parameters for each half-wave of short-circuit current. Verification has been pursued for the proposed traction network model.
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