Essays about: "railway power quality"

Showing result 1 - 5 of 8 essays containing the words railway power quality.

  1. 1. Parametric Studies of Train-Track-Bridge Interaction : An evaluation of the dynamic amplification due to track irregularities for freight transport

    University essay from KTH/Bro- och stålbyggnad

    Author : Rasmus Elm Dahlman; Emil Lundberg; [2021]
    Keywords : Dynamics; dynamic amplification factor; railway bridge; train-track-bridge interaction; vehicle model; track irregularities; PSD; Dynamisk förstoringsfaktor; dynamik; järnvägsbroar; tåg-spår-bro interaktion; fordonsmodell; spårojämnheter; PSD;

    Abstract : In this thesis a train-track-bridge interaction (TTBI) model is developed in order to study the dynamic amplification from track irregularities on railway bridges traversed by freight trains. These simulations are of great importance since rail freight transport is expected to increase in order to meet the climate goals. READ MORE

  3. 2. The Effect of High Wheel Impact Load on the Rail Reliability - a Case Study at Bodsjön

    University essay from KTH/Spårfordon

    Author : Ngoc Thúy Vy Dang; [2021]
    Keywords : rail defects; rail reliability; Ultrasonic Test; wheel damage; Wheel Impact Load Detector; statistics; järnvägsdefekter; järnvägssäkerhet; ultraljudstest; hjulskador; hjullastningsdetektor; statistik;

    Abstract : This study focuses on the reliability of railway track in the relation with high loads resulted from wheel damages, where higher (dynamic) vertical wheel loads are expected from trains with damaged wheels. The Swedish Transport Administration (Trafikverket) has monitored and recorded data of rail defects and breaks. READ MORE

  4. 3. An MMC-based topology with Dual-Active-Bridge power channels for load balancing in 50 Hz-railway applications

    University essay from KTH/Skolan för elektro- och systemteknik (EES)

    Author : Andreas Zafeiropoluos; [2017]
    Keywords : Power electronics; STATCOM; MMC; power channel; power quality; negativesequence compensation; high-speed trains;

    Abstract : The purpose of this thesis report is to investigate challenges related to railway electrification. Inac-railway systems, trains are most often single-phase loads, which can create significantunbalances in the grid, when fed directly from two adjacent phases. READ MORE

  5. 4. Regionen ur ett kommunalt perspektiv : en diskursiv studie om regionförstoring och den regionala utvecklingens konstruktion i norska samfunnsplaner, med empiri från kommunerna kring Gjøvikbanen

    University essay from SLU/Dept. of Landscape Architecture, Planning and Management (from 130101)

    Author : Stina Pantzar; [2016]
    Keywords : regional utveckling; regionförstoring; pendling; diskurs; makt; norsk planering;

    Abstract : Under hela mänsklighetens historia har framsteg och förändringar i lokaliseringsmönster, samhällsorganisering, ekonomi och teknik växelvis samverkat för att förändra våra rörelsemönster och idéer om ”god” samhällsplanering. De senaste 15 åren har den regionala planeringen tagit en självklar plats i det nuvarande planeringsparadigmet såväl i Sverige som i Norge, tillsammans med de två teoretiskt eleganta begreppen regional utveckling (no. READ MORE

  6. 5. Compensating Unbalances in Synchronous Railway Traction Systems with Railway Power Conditioners

    University essay from Uppsala universitet/Elektricitetslära

    Author : Matilda Örnkloo; [2016]
    Keywords : ;

    Abstract : The electrified railway presents significant challenges for the electrical grid. This is due to the characteristics of the constructed railway system. Trains are single-phase loads, fed by two adjacent phases from the grid. Feeding phases will change continuously at every substation. READ MORE