Sökning: "small-signal stability"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden small-signal stability.

  1. 1. Wind Power - Added Value for Network Operation

    Författare :Nayeem Ullah; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; torsional oscillation; reactive power ancillary service; voltage stability; power system simulator.; STATCOM; non-minimum phase system; Variable speed wind turbine; frequency control; sensitivity analysis; transient stability; small-signal stability;

    Sammanfattning : This dissertation deals with the investigation on different value added properties of variable speed wind turbines (VSWT) that stem from the flexible controllability of converter interfaced wind turbines (WT). Improvements in voltage and transient stability of a nearby grid, small-signal stability improvement on the power system, frequency control support for the network operation, as well as thetechnical and the economic issues related to the reactive power ancillary service provision, are among the issues covered. LÄS MER

  2. 2. On the Dynamics and Statics of Power System Operation Optimal Utilization of FACTS Devicesand Management of Wind Power Uncertainty

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Amin Nasri; Mehrdad Ghandhari; Zhang Xiao-Ping; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Trajectory sensitivity analysis TSA ; transient stability; small signal stability; flexible AC transmission system FACTS devices; critical clearing time CCT ; optimal power flow OPF ; network-constrained ac unit commitment ac-UC ; wind power uncertainty; wind power spillage; stochastic programming; Benders’ decomposition; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Nowadays, power systems are dealing with some new challenges raisedby the major changes that have been taken place since 80’s, e.g., deregu-lation in electricity markets, significant increase of electricity demands andmore recently large-scale integration of renewable energy resources such aswind power. LÄS MER

  3. 3. On Stability Enhancement in AC/DC Power Systems through Multi-terminal HVDC Controllers

    Detta är en avhandling från KTH Royal Institute of Technology

    Författare :Omar Kotb; Mehrdad Ghandari; Oriol Gomis Bellmunt; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; AC DC power system; hybrid MTDC; multi-terminal HVDC; small signal stability; VSC-MTDC; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Due to the increasing share of renewable energy sources in modern power systems and electricity market deregulation, heavy inter-regional and cross-border power flows are becoming a commonplace in system operation. Moreover, large-scale integration of renewable energy sources is expected to pace up, therefore new solutions have to be developed to integrate these intermittent sources, which are also characterized by being distributed over large geographical areas, such as offshore wind farms. LÄS MER

  4. 4. Performance Quantification of Interarea Oscillation Damping Using HVDC

    Detta är en avhandling från KTH Royal Institute of Technology

    Författare :Joakim Björk; Karl H. Johansson; Lennart Harnefors; Robin Preece; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HVDC transmission control; interarea oscillations; power oscillation damping; small-signal stability; frequency control; controllability; MIMO control; decoupling control; multivariable interaction; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : With the transition towards renewable energy, and the deregulation of the electricity market, generation patterns and grid topology are changing. These changes increase the need for transfer capacity. One limiting factor, which sometimes leads to underutilization of the transmission grid, is interarea oscillations. LÄS MER

  5. 5. Genetic algorithm based design of power system stabilizers

    Detta är en avhandling från KTH Royal Institute of Technology

    Författare :Adrian Andreoiu; [2002]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; design; power system stabilizers; power systems; genetic algorithm; small-signal stability;

    Sammanfattning : .... LÄS MER