Control of Shunt Active Power Filter for Railway Sub-station

This paper presents the results of a study for the connection of sub-stations of French railway traction at the 20 kV EDF distribution network. A solution containing active power filter is adopted. The main constraint is the filtering of the predominant harmonic current components of rank 11 and 13 which are absorbed by the traction group. First, it is necessary to determine the appropriate structure of the active power filter. Then, it is necessary to design passive elements and assure appropriate current regulation. At last, it is necessary to extract from the non-linear load current the harmonic components to be compensated. Two methods of selective harmonics identification are presented and analyzed. The simulations carried out with PSIM coupled with Matlab Simulink make it possible to validate the adopted solution