Search for dissertations about: "traction power supply system"

Showing result 1 - 5 of 6 swedish dissertations containing the words traction power supply system.

2. 1. High Frequency Model of Electrified Railway Propulsion System for EMC Analysis

   Author : Kelin Jia; Rajeev Thottappillil; Hans Bängtsson; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electromagnetic compatibility; railway; propulsion system; multitransmission line; ac motor modeling; vector fitting; fast transient;

   Abstract : A model of the electrified railway propulsion system working in a wide frequency range is studied in this thesis. The high frequency modeling is the first stage to study and predict the Electromagnetic compatibility (EMC) problems in the electrified railway propulsion system, which are safety and reliability issues of high concern. READ MORE

4. 2. Railway Power Supply Models and Methods for Long-term Investment Analysis

   Author : Lars Abrahamsson; Lennart Söder; Magnus Olofsson; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; Elektroteknik;

   Abstract : The aim of the project is to suggest an investment planning programwhere the welfare of the society is to be maximized. In order to beable to decide on a wise investment plan, one needs to know theconsequences of different choices of power system configurations. READ MORE

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

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

   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

6. 4. A method for including the responses of lumped devices into multi-conductor transmission line model for electrified railways

   Author : Ziya Mazloom; Uppsala universitet; []
   Keywords : TECHNOLOGY; TEKNIKVETENSKAP;

   Abstract : The electrified railway system consisting of overhead lines for traction power supply, auxiliary power, return conductors for traction current and the tracks can be modeled as a system of multiconductor transmission lines (MTL) above a finitely conducting ground. There are several lumped devices connected in series or in parallel along this MTL and the response of the MTL to electromagnetic transients need to be solved along with the device response. READ MORE

7. 5. Multi-conductor transmission line model for electrified railways: A method for including responses of lumped devices

   Author : Ziya Mazloom; Rajeev Thottappillil; Farhad Rachidi; KTH; []
   Keywords : ;

   Abstract : For studying the response to transients caused by lightning and other electromagnetic disturbance sources, electrified railway systems can be represented as a system of multiconductor transmission lines (MTL) above a finitely conducting ground. The conductors present in this system would be wires for traction power supply, auxiliary power, return conductors for traction current, the tracks, and finitely conducting ground. READ MORE