Search for dissertations about: "control frequency and power"

Showing result 21 - 25 of 341 swedish dissertations containing the words control frequency and power.

  2. 21. Hydropower generator and power system interaction

    Author : Johan Bladh; Urban Lundin; Rafael Escarela-Perez; Uppsala universitet; []
    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

  4. 22. On Power Control and Scheduling to Mitigate Adjacent Channel Interference in Vehicle-to-Vehicle Communication

    Author : Anver Hisham Unnichiriyath Siddique; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Scheduling; ACI; Power Control; V2V Communication;

    Abstract : Safety applications play an essential role in supporting trac safety and eciency in next generation vehicular networks. The eciency of safety applications depends heavily on the establishment of reliable communication since these types of applications have strict requirements on latency and reliability. READ MORE

  5. 23. A Stochastic Control Approach to Include Transfer Limits in Power System Operation

    Author : Magnus Perninge; Lennart Söder; Christopher DeMarco; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Frequency control; power regulating market; power system operation; power system security; stochastic impulse control; transfer capacity; transfer limit;

    Abstract : The main function of the power grid is to transfer electric energy from generating facilities to consumers. To have a reliable and economical supply of electricity, large amounts of electric energy often have to be transferred over long distances. READ MORE

  6. 24. Training and hormones in physically active women : with and without oral contraceptive use

    Author : Lisbeth Wikström-Frisén; Karin Larsén; Anna Nordtröm; Cecilia Fridén; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; female athletes; hormones; menstrual cycle; oral contraceptive cycle; resistance training; muscle strength; power; body composition; female athlete triad; overreaching; overtraining syndrome;

    Abstract : Background: The number of women participating in sports has increased dramatically, though research in sports are often performed on men. Physical exercise is known to increase physical performance and improve well-being. READ MORE

  7. 25. Hydropower plants and power systems : Dynamic processes and control for stable and efficient operation

    Author : Weijia Yang; Per Norrlund; Urban Lundin; Christophe Nicolet; Uppsala universitet; []
    Keywords : ;

    Abstract : As the largest global renewable source, hydropower shoulders a large portion of the regulation duty in many power systems. New challenges are emerging from variable renewable energy (VRE) sources, the increasing scale and complexity of hydropower plants (HPPs) and power grid. READ MORE