Search for dissertations about: "Symbolic eigenvalue expressions"

Found 3 swedish dissertations containing the words Symbolic eigenvalue expressions.

  1. 1. On the robust stability analysis of VSC-HVDC systems

    Author : Yujiao Song; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; passivity theorem; small gain theorem; symbolic eigenvalue expressions; Nyquist stability analysis; distributed parameter cable model; VSC-HVDC system; AC-grid interaction;

    Abstract : This thesis focuses on small signal stability analysis of VSC-HVDC systems, emphasizing the system stability robustness with regard to the connected AC-grid and the distributed parameter DC-grid model respectively. In addition, for strong AC-grid connected systems, analytical eigenvalue expressions are provided to investigate the impact of physical or control parameters on the system stability for both two-terminal and multi-terminal VSC-HVDC systems. READ MORE

  2. 2. Converter interactions in VSC-based HVDC systems

    Author : Georgios Stamatiou; Chalmers University of Technology; []
    Keywords : Symbolic eigenvalue expressions; Frequency Domain Analysis; Droop control; Net damping; VSC; Passivity Analysis; MTDC; Poor damping; HVDC;

    Abstract : The main objective of this thesis is to perform stability and control studies in the area of VSC-HVDC. A major part of the investigation focuses on the explanation of poorly-damped conditions and instability that are linked to dc-side resonances. READ MORE

  3. 3. Analysis of VSC-based HVDC systems

    Author : Georgios Stamatiou; Chalmers University of Technology; []
    Keywords : HVDC; MMC; MTDC; Poor damping; Symbolic eigenvalue expressions; Droop control; Passivity Analysis; Net damping; Frequency Domain Analysis; VSC;

    Abstract : The main objective of this thesis is to perform stability and control studies in the area of VSC-HVDC systems. A major part of the investigation focuses on the development of procedures, whose aim is to understand, explain and avoid poorly-damped conditions or instability that may appear due to dc-side resonances, which stem from the interaction of converters and passive elements in such systems. READ MORE