Search for dissertations about: "Grid Synchronization"

Showing result 6 - 10 of 12 swedish dissertations containing the words Grid Synchronization.

  1. 6. Autonomic Management of Partitioners for SAMR Grid Hierarchies

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Henrik Johansson; Jarmo Rantakokko; Michael Thuné; Johan Steensland; Manish Parashar; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Beräkningsvetenskap; Scientific Computing;

    Abstract : Parallel structured adaptive mesh refinement methods decrease the execution time and memory usage of partial differential equation solvers by adaptively assigning computational resources to regions with large solution errors. These methods result in a dynamic grid hierarchy. READ MORE

  2. 7. Fundamental Limitations of Distributed Feedback Control in Large-Scale Networks

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Emma Tegling; Henrik Sandberg; Ali Jadbabaie; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Distributed control; Large-scale systems; networked control; decentralized control; fundamental limitations; networked systems; frequency control; smart grid; consensus; spatial invariance; power system dynamics; microgrids; vehicular formation systems; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Networked systems accomplish global behaviors through local feedback interactions. The purpose of a distributed control design is to select interaction rules and control protocols that achieve desired global control objectives. READ MORE

  3. 8. Modeling and Control of a PMSynRel Drive for a Plug-InHybrid Electric Vehicle

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Shuang Zhao; Chandur Sadarangani; Sigurd Övrebö; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electric drive; feasible region; inductance spatial harmonics; integrated charger; permanent-magnet assisted synchronous reluctance machine; plug-in hybrid-electric vehicle; polarity detection; saturation and cross-saturation; sensorless control; signal injection; transient modeling.;

    Abstract : This thesis presents two transient models for a prototype integrated charger for use in a plug-in hybrid-electrical vehicle application. The models can be useful in order to develop control algorithms for the system or to recommend improvements to the machine design. READ MORE

  4. 9. On Control of Back-to-Back Converters and Sensorless Induction Machine Drives

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Rolf Ottersten; [2003]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; active filtering; flux estimation; sensorless control; induction motor; back-to-back converter; pulsewidth-modulated rectifier; virtual flux; vector current control;

    Abstract : This thesis focuses on design and analysis of the control system structure for back-to-back converter squirrel-cage induction machine drives. Particularly, sensorless control of induction machines, meaning vector control without a mechanical shaft sensor, and vector control of pulsewidth-modulated (PWM) rectifiers are considered. READ MORE

  5. 10. Analytical Results on the Performance of Shared Resource Allocation Systems

    University dissertation from Gothenburg : Chalmers tekniska högskola

    Author : Iosif Salem; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; energy dispatch problem; shared-object systems; Resource allocation; analytical performance evaluation;

    Abstract : Resource allocation is a prevalent problem in a wide range of domains of computer science. Analytical tools that evaluate the performance of resource allocation systems allow us to compare with experimental ones, and utilize the design of such systems. READ MORE