Measurements and post-processing for achievement of electromagnetic transient interference models: Application to the signals provided by railway substations

This paper is focused on post-processing developments to automatically analyze measurement results and extract models of transient electromagnetic noises. The study presented in this paper is applied on the electromagnetic disturbances which are produced by the railway substations which supply the railway electrical infrastructure. Currents measurements were performed inside a substation in order to identify the harmonics and the transient signals which are created by the power devices of the substation. Finally, this paper suggests exploiting a time-frequency analysis and an adequate post processing to automatically detect transient signals. Results and concrete applications of these representations will be presented to automatically extract model of the transient noises present in the railway domain.