Search for dissertations about: "hydroelectric power"

Showing result 1 - 5 of 25 swedish dissertations containing the words hydroelectric power.

  2. 1. Electric Power Generation and Storage Using a High Voltage Approach

    Author : Björn Bolund; Mats Leijon; Hans Bernhoff; Tore Undeland; Uppsala universitet; []
    Keywords : Engineering physics; Flywheel; Generation; Generator; High Voltage; Power flow; Poynting; Teknisk fysik;

    Abstract : Production and consumption of electricity have grown enormously during the last century. No mater what the primary source of energy is, almost all generation of electricity comes from conversion of a rotational movement in a generator. The aim of this thesis is to see how high voltage technology influence production and storage of electricity. READ MORE

  4. 2. The Analysis of Thermal Power Stations and their Interaction with the Power System using Simulator Test Methods

    Author : Jan Andersson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermal power station; network simulator; frequency control; island operation; turbine model;

    Abstract : This thesis describes a new method of testing power stations with regard to their frequency control behaviour and analyses results obtained using this new method. The test concept is based on that the power station unit to be tested remains synchronized onto its normal strong network, whereas the frequency control behaviour is set up to be that of the conditions if the unit was working on a much smaller network, using a computer based simulator system and feeding simulated control signals to the input of the units frequency control system. READ MORE

  5. 3. Electro-mechanical modelling and analysis of hydroelectric rotor systems

    Author : Martin Karlsson; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computer Aided Design; Datorstödd maskinkonstruktion;

    Abstract : Hydroelectric power generation supplies about 20 percent of the world's electricity and is the most important renewable energy converting industry. The installed capacity of Hydro-electrical power generation is approximately 700GW with a production of 2600TWh/year. The technically feasible potential of hydro power is 14000TWh/year. READ MORE

  6. 4. Power generation choice in the presence of environmental externalities

    Author : Thomas Sundqvist; Luleå tekniska universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; Nationalekonomi;

    Abstract : This dissertation consists of an introductory part and six self-contained papers, all related to the issue of power generation choice in the presence of environmental externalities. Paper 1 provides a critical survey of a large number of electricity externality studies carried out during the last decades, and discusses a number of conceptual, policy-related and, in some cases, unresolved questions in the economic valuation of electricity externalities. READ MORE

  7. 5. Core Loss Prediction in Hydroelectric Generators and Analysis of a Contra-Rotating Machine Topology

    Author : Martin Ranlöf; Uppsala universitet; []
    Keywords : TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : The call for increased accuracy in the process of design and analysis of electrical machines has encouraged the use of numerical methods to calculate the electric and magnetic field distributions within this type of apparatus. The finite element method is a numerical technique that has become specifically widespread and popular, due to the relative swiftness and accuracy with which it is possible to treat complex machine geometries and non-linear material characteristics. READ MORE