Fault detection of Railway EMC problems using MATLAB models

The complexity of the railway system increases when more electronics are used. When dealing with railway infrastructure that has not been renewed over the last several years like in Sweden and with new trains equipped with significant electronic components, it can find itself in one of the most relevant railway problems: the intensive emergency stop can be brake triggered, causing prolonged delays with cascading effects. The reason is that the train control central (TCC) could find unexpected signals from the track due to transient electromagnetic fields that interfere in the train control system circuits. In this paper a Matlab model of the power supply system of the Swedish railway infrastructure is proposed in which it is possible to integrate a train as an active load. The source of these transient electromagnetic (EM) fields is the engine which can be integrated in different position of the track to study the behaviour of the low frequency system from an electrical point of view. The output of the model can be used as an input for a design of an electromagnetic model in higher frequencies. After the design of the model, a measurement campaign in the north of Sweden to validate the model was carried out.