Design and testing of 25 kV AC electric railway power supply systems

U članku su opisani potrebni koraci za konstruiranje i testiranje novoizgrađene elektrovučne podstanice koja je predviđena za napajanje jednog dijela prigradske pruge u željezničkom čvoru Zagreb. Potrebna snaga za napajanje elektrovučne podstanice određena je na osnovi elektrovučnog proračuna provedenog za maksimalni vozni red. Za vrijeme testnog rada elektrovučne podstanice su provedena potrebna mjerenja da bi se odredile tehničke karakteristike podstanice kao i utjecaj na okolinu. Provedena su i mjerenja kvalitete električne energije na prijenosnoj elektroenergetskoj mreži za vrijeme testnog rada podstanice. Također su dani rezultati mjerenja elektromagnetskog polja unutar i u blizini same podstanice.The paper describes the procedures implemented in the design and testing of the newly built traction substation, which is foreseen for the power supply of part of the electrical tracks in the area of Zagreb. The power capacity of the new traction transformer substation was determined according to the load flow calculation that was carried out for the period of maximal traffic time-table. During the period of test operation a number of measurements were conducted in order to testify technical performances of the substation, as well as to verify its impacts on the environment. Measurements of the power quality in the utility power network, which supplies the traction system, were conducted. Also, measurements of electrical and magnetic fields inside the traction substation and in its vicinity were undertaken