Search for dissertations about: "frequency tuning"

Showing result 1 - 5 of 92 swedish dissertations containing the words frequency tuning.

  1. 1. The Frequency of the Frequency On Hydropower and Grid Frequency Control

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Linn Saarinen; Uppsala universitet.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hydropower; frequency control; governors; power system stability; inertia; primary control; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Abstract : Variations in the electricity consumption and production connected to the power system have to be balanced by active control. Hydropower is the most important balancing resource in the Nordic system, and will become even more important as the share of variable renewable energy sources increases. READ MORE

  2. 2. Integration of Non-synchronous Generation - Frequency Dynamics

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Johan Björnstedt; Lunds universitet.; Lund University.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Frequency control; Frequency dynamics; Frequency response; Non-synchronous generation; Power system; Synthetic inertia; Wind power;

    Abstract : Popular Abstract in Swedish I Sverige och Norden har elproduktion traditionellt skett med huvudsakligen vattenkraft och kärnkraft. Detta håller dock på att förändras i takt med en allt större vindkraftsutbyggnad. READ MORE

  3. 3. Relay Feedback and Multivariable Control

    University dissertation from Department of Automatic Control, Lund Institute of Technology (LTH)

    Author : Karl Henrik Johansson; Lunds universitet.; Lund University.; [1997]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; robotics; Automation; Frequency methods; Process control; Sequential control; Automatic tuning; Control education; Laboratory process; Performance limitations; Decentralized control; Multivariable zero; Multivariable systems; Hybrid control; Nonlinear dynamics; Limit cycles; Oscillations; Relay feedback; Sliding modes; control engineering; Automatiska system; robotteknik; reglerteknik;

    Abstract : Popular Abstract in Swedish Återkoppling är en fundamental princip inom reglertekniken. Genom att mäta vissa variabler kan andra påverkas så att ett system uppför sig på önskat vis. Denna doktorsavhandling behandlar två typer av återkoppling: reläåterkoppling och flervariabel återkoppling. READ MORE

  4. 4. A Harmonic-Oscillator Design Methodology Based on Describing Functions

    University dissertation from Department of Automatic Control, Lund Institute of Technology (LTH)

    Author : Jesper Bank; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; oscillator design efficiency; phase noise; impulse sensitivity function; design methodology; amplitude control; frequency tuning; oscillator; describing function;

    Abstract : Oscillators are present in most electronic equipment where they provide timing information, for example as sampling clocks in analog-to-digital converters or as radio carriers in wireless communications. To design an oscillator, we must have knowledge of the properties and the operation of oscillators. READ MORE

  5. 5. Reconfigurable Impedance Matching Networks for Radio Receivers

    University dissertation from Lund Institute of Technology

    Author : Peter Sjöblom; Lunds universitet.; Lund University.; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; Telekommunikationsteknik; Telecommunication engineering; Elektronik; Electronics; reconfigurable matching; switched capacitor; antenna tuning unit; impedance tuning unit; High frequency technology; Elektroteknik; microwaves; Högfrekvensteknik; mikrovågor;

    Abstract : Mobile phones become smaller but include more advanced functions for every new generation. This paradox is possible since reduced transistor size and increased integration of digital building blocks free space for new functions. READ MORE