An influence of a complex modernization of the DC traction power supply on the parameters of an electric power system

Abstract

Urban and suburban public transport constitute basics of functioning of modern, urbanized metropolises. It is a comfortable, economic and ecological means of transportation. Thus, a stable and fast growth of this solution. One of its components is the power supply system. It should allow functioning of the whole transportation system, maintaining the following criteria: energy efficiency and modernity. These criteria have contributed to creation and modernization of power supply systems. Where it comes to DC systems, such an investment includes: replacing 6-pulse rectifiers with 12-pulse rectifiers and raising rated supply voltage. In this article, the authors have presented research results, based on measurements of electrical energy parameters before and after a modernization of a suburban transportation traction system. These parameters have been divided into two groups. The first consists of parameters mentioned in the EN50160 norm. Another group consists of parameters not mentioned in the norm. What has been presented are waveforms and graphs showing these parameters. In the final part of the article a discussion on reasonability of introducing new, modernized traction power supply system for suburban transportation has been performed.

Aspect of load variability in determining power losses in the DC electric traction power supply system

“…Przyczyną ich występowania jest z jednej strony budowa podstacji trakcyjnych prądu stałego i charakter obciążenia trakcyjnego, a z drugiej strony wartość energii elektrycznej zużywanej przez system kolejowy. [1], [2], [4], [17], [18]…”

Reducing Power Losses by Voltage Stabilization at the DC Rolling Stock Current Collector

“…The proposed option for improving the operation of DC traction systems is the use of modern semiconductor converters in traction substations and rolling stock devices, allowing not only to pro-vide the required electrical power qualitative indicators, but to likewise stabilize the voltage at the current collector or traction motors [3][4][5][6][7]. The wanted performance for fulfillment of the staged purpose is inherent in the ARVS semiconductor convertersactive rectifier -voltage source.…”

Modeling of the operation of the reserve source of electric energy of railway traffic control devices

“…Wszystkie te urządzenia potrzebują zasilania energią elektryczną, które z powodu awarii sieci elektroenergetycznej może zostać przerwane. W tych warunkach gwarancją ciągłości zasilania są zespoły prądotwórcze [4,8,11,12,17].…”