Search for dissertations about: "Railway Traction Systems"

Showing result 1 - 5 of 12 swedish dissertations containing the words Railway Traction Systems.

  1. 1. Electromagnetic Interference in Modern Electrified Railway Systems with Emphasis on Pantograph Arcing

    University dissertation from Uppsala : Institutionen för teknikvetenskaper

    Author : Surajit Midya; Uppsala universitet.; [2008]

    Abstract : Electrified railways are undergoing rapid modernized in terms of increased speed, freight capacity and increased traffic. Traction systems are spread across countries with different signaling and power feeding systems. Signalling systems are undergoing modernization and now-a-days are more dependent on wireless and radio based services. READ MORE

  2. 2. Harmonic Mitigation in Traction Drives

    University dissertation from Department of Industrial Electrical Engineering and Automation, Lund Institute of Technology

    Author : Hans Bängtsson; [1999]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hydraulics; Mechanical engineering; converter; line interference; track circuit; Railway signalling system; vacuum technology; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik;

    Abstract : In railway traffic the low friction between wheel and rail causes long braking distances, normally much longer than the sight distance of the driver, i.e. if the driver starts the braking when a problem on the track is discovered, it might be too late to brake the train. Therefore, safe railway traffic can not only rely on the driver. READ MORE

  3. 3. Availability Analysis of Frequency Converters in Electrified Railway Systems

    University dissertation from Luleå tekniska universitet

    Author : Yasser Ahmed Mahmood; Luleå tekniska universitet.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Drift och underhållsteknik; Operation and Maintenance;

    Abstract : The increased interest in electrified railways can be explained by their huge capacity, high efficiency, and low pollution. Today’s electrified railway is expecting higher demands for electric power for increased speeds, increased traffic volume capacity, and heavier freight loads. READ MORE

  4. 4. Increasing Energy Efficiency in Electric Trains Operation : Driver Advisory Systems and Energy Storage

    University dissertation from Västerås : Mälardalen University

    Author : Nima Ghaviha; Mälardalens högskola.; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Driver Advisory System; Catenary-free Operation; Electric Train; Electric Multiple Unit; Battery; Energy Efficiency; Energy Storage; Speed Profile Optimization; Energy- and Environmental Engineering; energi- och miljöteknik;

    Abstract : Electric traction is the most efficient traction system in the railway transportation. However, due to the expensive infrastructure and high power demand from the grid, the share of electric trains in the railway transportation is still lower than other trains. READ MORE

  5. 5. Numerical Modelling of Transients in Electrical Systems

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Mihael Zitnik; Uppsala universitet.; [2001]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik; Electricity; Esp The Study Of Transients and Discharges; elektricitetslära; ssk studiet av transienter och urladdning;

    Abstract : This thesis deals with the numerical modelling of the response of electrical systems to transient surge voltages and currents caused by lightning. Electrical systems, when subjected to high amplitude transients behave in ways very different from its behaviour under normal operating conditions. READ MORE