Search for dissertations about: "Wind Farms"

Showing result 11 - 15 of 65 swedish dissertations containing the words Wind Farms.

  2. 11. On maintenance optimization for offshore wind farms

    Author : Francois Besnard; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; life cycle cost; optimization; maintenance; maintenance planning; Offshore wind energy; maintenance strategy; maintenance support organization; reliability;

    Abstract : The maintenance cost is known to be an important part of the levelized cost of energy generated by wind parks. Operational costs can be significantly reduced by optimizing decisions for maintenance strategies, maintenance support organization and maintenance planning. READ MORE

  4. 12. Dynamic Models of Wind Turbines

    Author : Abram Perdana; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; frequency stability; variable-speed; modeling; power system stability; validation; aggregated model; fixed-speed; voltage stability; wind turbine;

    Abstract : The impact of wind power generation in the power system is no longer negligible. Therefore, there is an urgent need for wind turbine models that are capable of accurately simulating the interaction between wind turbines or wind farms and the power system. READ MORE

  5. 13. Grid reinforcing wind generation

    Author : Nayeem Ullah; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; transient stability; variable speed wind turbine; long term voltage stability; short term voltage stability; frequency converter;

    Abstract : In this thesis, effects of some grid assisting possibilities that wind turbines could be equipped with, are investigated. The background is that concerns regarding the stability of the already existing power system in the presence of large wind farms have been risen. READ MORE

  6. 14. Subsynchronous Resonance in Doubly Fed Induction Generator based Wind farms

    Author : Selam Chernet; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; generalized Nyquist criterion GNC .; Passivity; doubly-fed induction generator DFIG ; subsynchronous controller interaction SSCI ; Wind power; Impedance-based analysis; induction generator effect IGE ; subsynchronous resonance SSR ;

    Abstract : The objective of this thesis is to investigate the risk for instabilities due to subsynchronous resonance (SSR) conditions in large wind farms connected to series-compensated transmission lines. In particular, the focus is on doubly-fed induction generator (DFIG) based wind farms. READ MORE

  7. 15. Subsynchronous Resonance in Doubly-Fed Induction Generator Based Wind Farms

    Author : Selam Chernet; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Induction Generator Effect IGE ; Doubly-Fed Induction Generator DFIG ; SubSynchronous Resonance SSR ; passivity.; Wind power; impedance-based analysis; SubSynchronous Controller Interaction SSCI ;

    Abstract : The objective of this thesis is to investigate the risk for instabilities due to SubSynchronousResonances (SSR) conditions in large wind farms connected to series-compensated transmissionlines. In particular, the focus is on Doubly-Fed Induction Generator (DFIG) based windfarms. READ MORE