Search for dissertations about: "Electric Multiple Unit"

Found 5 swedish dissertations containing the words Electric Multiple Unit.

  1. 1. 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

  2. 2. The Economics of Community-Based Wildlife Conservation in Zimbabwe

    University dissertation from Göteborg : Göteborg University

    Author : Edwin Muchapondwa; Göteborgs universitet.; Gothenburg University.; [2003]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; bio-economic; CAMPFIRE; common property; community; design principles; dichotomous choice; diversification; elephant nuisance; institutions; insurance; poaching; risk management; simple spike; wildlife conservation; wildlife-livestock conflict;

    Abstract : This thesis deals with the economics of community-based wildlife conservation in Zimbabwe. It consists of an introductory chapter and four self-contained chapters. Chapter 1 spells out the history of wildlife conservation leading to the inception of CAMPFIRE. Research issues at the core of the rest of the thesis are also highlighted. READ MORE

  3. 3. Numerical study on multi-pantograph railway operation at high speed

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Zhendong Liu; KTH.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; numerical study; pantograph-catenary system; multi-pantograph operation; dynamic behaviour; high-speed operation; Järnvägsgruppen - Fordonsteknik; Järnvägsgruppen - Fordonsteknik;

    Abstract : Multi-pantograph operation allows several short electric multiple unit (EMU) trainsets to be coupled or decoupled to adapt to daily or seasonal passenger-flow variation. Although this is a convenient and efficient way to operate rolling stock and use railway infrastructure, pantographs significantly influence each other and even significantly change the dynamic behaviour of the system compared to single-pantograph operation in the same condition. READ MORE

  4. 4. Hydropower generator and power system interaction

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Johan Bladh; Uppsala universitet.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Amortisseur windings; applied voltage test; automatic voltage regulators; damper windings; damping torque; empirical modelling; equivalent circuits; excitation control; finite element method; hydropower generators; power system restoration; power system stability; synchronous machines; self excitation; shaft torque amplification; short circuit test; single machine infinite bus; slip test; standstill frequency response test; subsynchronous oscillations; synchronising torque; synchronous generators; torsional interaction.; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Abstract : After decades of routine operation, the hydropower industry faces new challenges. Large-scale integration of other renewable sources of generation in the power system accentuates the role of hydropower as a regulating resource. READ MORE

  5. 5. Joint Pose and Radio Channel Estimation

    University dissertation from Department of Automatic Control, Lund Institute of Technology, Lund University

    Author : Anders Mannesson; Lund University.; Lunds universitet.; Lund University.; Lunds universitet.; [2013]

    Abstract : This thesis investigates the combination of pose and radio channel estimation. Pose is the knowledge of the position and orientation of a device whereas the radio channel describes the transmission medium between radio transmitters and receivers. READ MORE