Search for dissertations about: "J. Ström"

Showing result 1 - 5 of 7 swedish dissertations containing the words J. Ström.

  2. 1. Distance Protection of Transmission Lines with High Levels of Series Compensation : A study on frequency and time domain communication independent distance protection for series compensated lines

    Author : Md Tanbhir Hoq; Nathaniel Taylor; Jianping Wang; Claus Leth Bak; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Series capacitor; Series compensation; Transmission line; Distance protection; Incremental quantity; Lissajous curve; RL model; RLC model; Seriekondensator; Seriekompensation; Transmissionslinje; Distansskydd; Inkrementell kvantitet; Lissajous-kurva; RL-modell; RLC-modell; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Series capacitors are used in electric transmission lines to increase their power transfer capacity. They compensate for the inductive reactance of the line. They offer a useful alternative to building new lines, in view of economic and environmental constraints. READ MORE

  4. 2. Developing a Security-Enhanced Internet-of-Things Based Communication System for Smart Microgrids

    Author : Aron Kondoro; Hannu Tenhunen; Anders Hallén; Nerey Mvungi; Masoumeh Ebrahimi; Giovanni Spagnuolo; KTH; []
    Keywords : Informations- och kommunikationsteknik; Information and Communication Technology;

    Abstract : Access to clean and reliable electric power is still a challenge for many local communities in developing countries. Smart micro-grids are one of the new practical solutions that can take advantage of locally available resources to satisfy the energy demands of these communities. READ MORE

  5. 3. High Strain Fatigue Crack Growth and Crack Closure

    Author : Michael Andersson; Materialteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; materialteknik; Materiallära; Material technology; crack closure; high strain fatigue; crack grotwh;

    Abstract : Understanding of the growth of fatigue cracks is of utmost importance since such growth often has a profound influence on the life of components subjected to cyclic loading. Thus, reliable fatigue life models enable a more efficient use of materials and improve the performance and efficiency in many applications. READ MORE

  6. 4. Influence of Seed Particle Material, Preparation, and Dynamics on Nanowire Growth

    Author : Karla Hillerich; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; metal-organic vapor phase epitaxy; III-V seminconductor materials; nanowires; Fysicumarkivet A:2013:Hillerich; in situ TEM;

    Abstract : Semiconducting nanowires have attracted scientific attention for more than 20 years due to their potential applications in electronic devices, as sensors, and in solid state lighting. These applications require high quality nanowires to begin with. READ MORE

  7. 5. Electron-lattice dynamics in π-conjugated systems

    Author : Magnus Hultell (Andersson); Sven Stafström; Alessandro Troisi; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; charge transport; electron-lattice dynamics; polaron; adiabatic transport; electron localization; internal conversion; Computational physics; Beräkningsfysik;

    Abstract : The work presented in this thesis concerns the dynamics in π-conjugated hydrocarbon systems. Due to the molecular bonding structure of these systems there exists a coupling between the electronic system and the phonons of the lattice. READ MORE