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Main page > Archive > 2015 > 01-02
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Competitive and resource-efficient urban mobility
Author: Tadeusz Dyr
Competitive and resource-efficient urban mobility Communication Together towards competitive and resource-efficient urban mobility was published in December 2013. This Communication aims to reinforce the support to European cities for tackling urban mobility challenges. A step-change in the approach to urban mobility is needed to ensure that Europe’s urban areas develop along a more sustainable path and that EU goals for a competitive and resource-efficient European transport system are met. The paper includes a presentation of the communication.

An Investment Plan for Europe
Author: Tadeusz Dyr, Agata Pomykała
An Investment Plan for Europe Increasing Europe’s competitiveness and stimulating investment for job creation is a priority for the European Commission. According to this idea, the European Commission has prepared a threefold initiative to accelerate the recovery from the crisis and investment growth in the years 2015-2017. The paper presents the assumptions of this concept.

The acceleration of the passenger traffic in Poland
Author: Andrzej Massel
The acceleration of the passenger traffic in Poland Starting from 14 December 2014 significant changes were introduced in the train timetable in Poland. They were related to the placing of ED250 EMUs into commercial operation and to completion of several infrastructure modernization and revitalization projects (or at least their significant stages). The paper contains analysis of rail connections between Warsaw and all capitals of voivodships. Moreover the most important connections in Poland have been compared with similar routes in a few EU countries in Central-Eastern Europe. The highest average commercial speed for 5 routes is being achieved in Poland (111,5 km/h) and the lowest – in Bulgaria (66,6 km/h).

Ultra Low Emission Zone in London
Author: Karolina Ziółkowska
London authorities and the public transport authority of in the agglomeration (Transport for London) take action to create zones of ultra-low emissions. Its creation is an important instrument for improving air quality in urban areas, living and working conditions. The article presents the concept of the functioning of the zone and benefits from its introduction. 4 pages.

Managing the public transport in Poland in conditions of implementing the regulation 1370 and acts on the public transport
Author: Czesław Piela
In March 2011 entered the law of 16 December 2010 on the public transport, called the Law of the PTZ. Thanks to this national law became in compliance with EU law, in particular with Regulation (EC) 1370/2007 of the European Parliament and of the Council of 23 October 2007 on public rail and road passenger transport, called by Regulation (EC) No 1370/2007. The article discusses some regulations of the Polish law and their importance for the functioning of the passenger transport market. 4 pages.

The project of a modern simulator for operators of rail vehicles
Author: Przemysław Brona, Adam Dąbrowski, Jarosław Koszela, Damian Król, Zbigniew Szafrański, Roman Wantoch-Rekowski
The project of a modern simulator for operators of rail vehicles Rail vehicle simulators play an important role in train drivers training. The paper presents selected simulators available in Poland, and explains the concept of a new simulator developed in the framework of a project funded by the National Centre for Research and Development.

Recuperation of the braking energy in the Prague tram system
Author: Mikołaj Bartłomiejczyk
Recuperation of the braking energy in the Prague tram system Growth in the number of electric vehicles transport equipped with regenerative braking capability is noticeable in the last decade. It opens the possibility of reducing of the energy consumption of urban traction. Important is the assessment of the possibilities to reduce energy consumption by increasing the degree of recovery breaking recuperation. The article presents an analysis of the efficiency of regenerative braking on the tram network of capital of the Czech Republic, Prague.
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Tramway with battery storage system – concept and tests


New generation of railway overhead line equipment system
Author: Tadeusz Knych, Paweł Kwaśniewski, Grzegorz Kiesiewicz, Andrzej Mamala, Wojciech Ściężor, Michał Jabłoński, Radosław Kowal, Paweł
New generation of railway overhead line equipment system Railway overhead line equipment is being produced in Poland based on the withdrawn industry standards and because of that those elements do not meet requirements of actual technical requirements. Design of currently used constructions is based on hot galvanized, commercially available simple shapes like channel and square sections made from S235JR grade steel. Because of that those elements have typically high mass and limited corrosion resistance. What is more outdated design present difficulties with assembly and daily use. Within this article concept of new generation of overhead line equipment is presented along with numerical (FEM) research results of stress and safety factor obtained with the use of applied operational load scheme. Conducted works showed that newly designed elements have safe level of effective stress and high safety factor – all tested under operational load scheme, existing in 3 kV DC railway systems.

Upper stiff system of overhead catenary
Author: Artur Rojek, Wiesław Majewski
Upper stiff system of overhead catenary The overhead contact system is an element of the railway infrastructure without reserve. Its task is to provide electricity to the traction vehicles. A particular solution to the overhead contact line is overhead conductor rail, often called overhead tunnel line. It is characterized by compact design, it does not require a large space. The essential element of this solution is aluminium hollow section. Although the cost of building a overhead conductor rail exceeds the cost of building the overhead contact line with catenary suspension, due to the possibility of decreased height of a tunnel the entire investment is cheaper. Overhead conductor rail, in addition to the tunnels, it is operated under wide viaducts, bridges bascule and complex technical facilities for rail vehicles. The paper shows the properties of the aluminium conductor rail as the profile of the section, its construction, mounting, described transition area from catenary to overhead conductor rail. In Europe, there are several companies that specialize in the design, manufacture and installation of overhead conductor rails. In the paper have been used materials of company: Siemens AG (conductor rail Sicat SR), Furrer+Frey AG (CR2 and CR3HS conductor rail) and Electren SA (conductor rail GSST) and experience with IK’s research in the field. Each of these companies has its own solutions of overhead conductor rail structures.

Evaluation of load data of traction substations recetifier units for the second line of Warsaw subway
Author: Ireneusz Chrabąszcz, Janusz Prusak, Szymon Tkaczyk
Evaluation of load data of traction substations recetifier units for the second line of Warsaw subway The paper presents the analysis of load changes of traction substations for the newly constructed metro line in Warsaw. The calculations are based on data concerning: profile of routes in construction, location of stops and traction substations and traction characteristics provided for the use of vehicles. On the basis of the assumed traffic density per time unit, maximum speed, idle time at the stations, etc., the waveforms of currents consumed by these vehicles were specified (by simulation), in partition to individual substations. Depending on the configuration of adopted electrical connections between substations, the calculations were performed for two cases: parallel (simultaneous) operation of all substations, and double-sided supply of each section. The period of the greatest planned density of traffic was subjected to analysis. On the basis of results obtained, there were calculated characteristic sizes (values) of the currents and the corresponding coefficients, which became the basis for further analysis and evaluation of applied load, in accordance to the problem of selection of overload classes for power rectifier units allocated to supply the said line. The obtained results were also analyzed by statistical methods and referenced to physically measured values for the case of the railway substation.

Transformers for static power converters. Design, constructions, research
Author: Andrzej Buze
Transformers for static power converters. Design, constructions, research Electrotechnical Institute has been conducting research and design of transformers with nominal frequency greatly exceeding 50 Hz. Over 30 types of transformers were designed and built by the institute. This paper was elaborated basing on acquired experience in and the research results. Basing on the laws of electric machines growth, dependencies of size, mass, losses and efficiency on nominal frequency were derived. It was shown that raising the nominal frequency by multiple factor does not give much benefit. It was shown that, for the transformer mass decrease, the key factor is dissipation of magnetic materials, construction and technology of production of the core. Table 3 contains parameters of nine types of transformers designed and built in the institute. High efficiency was obtained, and in case of nanocrystalline cores, exceptionally small mass of the transformers. This paper contains practical advices and remarks regarding construction and method of production of the transformers. Brief description of the research conducted in the Electrotechnical Institute was presented. Sample results of the dissipation of several types of cores were presented.

Ultrasonic method of detecting damage of rails using coding the phase of the diagnostic signal
Author: Krzysztof Gądek
In the diagnostics of rails are currently widely used ultrasonic methods and induction methods using magnetic induction to detect changes of the magnetic field of the rail, caused by the presence of geometric discontinuities, such as cracks. Conventional ultrasound research use a wheel [3] or sleigh [2] filled with water, equipped with a range of piezoelectric sensors. Ultrasonic sensors are arranged vertically (Fig. 1) above the rail level, operate in pulse mode scan B (Eng. B-scan) [7] for the detection of defects in the horizontal and at an angle θ = 70 ° to the normal to the running surface for the detection of transverse flaws. 3 pages.

Forecasting of the transport market
Author: Tadeusz Cisowski
Forecasting of the transport market The paper presents the models used in forecasting transport indicators. Multilevel transport market models were discussed. The author proposed an algorithm for predicting carriage on the basis the assessment of the dynamics processes occurring in the macroeconomic environment of rail transport.
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