Paweł Markowski
Technical Transactions, Electronical Engineering Issue 1-E (2) 2016, 2016, pp. 55 - 66
https://doi.org/10.4467/2353737XCT.16.029.5291The paper presents the load currents of two tram traction substations. These substations power lines with different characteristics of tram traffic. Loads were analysed for one working day and one public holiday. Attention was paid to the differences and similarities in the current waveforms. The demand level was assessed, with respect to the rectifier units in the substations. The time series method was used, inter alia, and chiefly an analysis of the characteristics of autoregression and partial autoregression was carried out, to act as a diversity index with respect to the nature of variability in the analysed traction load currents.
Paweł Markowski
Technical Transactions, Volume 11 Year 2018 (115), 2018, pp. 133 - 148
https://doi.org/10.4467/2353737XCT.18.168.9424The first part of this paper presents a comparison of the measured and simulated results of the load variability of rectifier units of a tram traction substation. The subject of the tests was a power supply substation for the contact line of a tramway, the profile and traffic of which was known. After a positive appraisal of the applied simulation method, an assessment of the range of load variability for the rectifier units took place for a hypothetical situation involving the concentrated disposition (layout) of the traction substations (socalled micro-substations). The results acquired under the described circumstances are presented in the second part of this paper.