Effectiveness of filters in 3 kV DC railway traction substations supplied by distorted voltage- measurements and diagnostics
AbstractElectric energy quality criteria relating to a DC supply system concern the circuits from the rectifiers installed in traction substations till the vehicle's current collector. Energy Law and related implementing provisions unequivocally state that an electrified transport system as the energy recipient shall fulfil the requirements regarding energy consumption, which are defined in the agreement. It imposes certain requirements for the railway power supply company. Introduction into traffic of the traction vehicles that are equipped with converter power electronics drive systems increased requirements regarding voltage quality in a DC catenary. At the same time, increase in share of non-linear recipients causes the increase of distortion in AC voltage supplying traction substations, and they also transfer to the DC side. Both these factors caused a change in operational conditions of the resonance smoothing filters hitherto used in rectifier traction substations supplied by AC medium voltage power lines. This paper presents a research and a case study of the problem of effectiveness of functioning of the used filters, from measurements allowing for problem identification to results of the studies of the proposed new solution of a filter and the results of observed exploitation of a prototype with the application of digital monitoring and diagnostics system.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).