Article

Overview of different wind generator systems and their comparisons

Inst. of Energy Technol., Aalborg Univ., Aalborg
IET Renewable Power Generation (Impact Factor: 1.72). 07/2008; DOI: 10.1049/iet-rpg:20070044
Source: IEEE Xplore

ABSTRACT With rapid development of wind power technologies and significant growth of wind power capacity installed worldwide, various wind turbine concepts have been developed. The wind energy conversion system is demanded to be more cost-competitive, so that comparisons of different wind generator systems are necessary. An overview of different wind generator systems and their comparisons are presented. First, the contemporary wind turbines are classified with respect to both their control features and drive train types, and their strengths and weaknesses are described. The promising permanent magnet generator types are also investigated. Then, the quantitative comparison and market penetration of different wind generator systems are presented. Finally, the developing trends of wind generator systems and appropriate comparison criteria are discussed. It is shown that variable speed concepts with power electronics will continue to dominate and be very promising technologies for large wind farms. The future success of different wind turbine concepts may strongly depend on their ability of complying with both market expectations and the requirements of grid utility companies.

7 Bookmarks
 · 
359 Views
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents a reduced-order H∞ optimal control for wind energy conversion systems. Two different timescale (slow and fast) dynamics of wind energy conversion systems are separated and processed independently using the singular perturbation theory. By using the decomposition technique, low-order, independent H∞ optimal filters and controllers are obtained, which provide computational advantages and enable implementations with different sampling rates. The control robustness and efficiency are shown by computer simulations.
    Electro/Information Technology (EIT), 2013 IEEE International Conference on; 01/2013
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Increasing penetration level of wind energy into the power system over the last decades has brought new issues and challenges. One of these concerns is the issue of low voltage ride through (LVRT). In this paper, given the characteristics of MW-level direct-drive wind turbines based on permanent magnet synchronous generator, a novel LVRT strategy is proposed, which is the combination of coordinate control of generator-side and grid-side converters and small un-loading branch. The implementation principle as well as calculation criteria are explained in depth. Finally, the feasibility of the proposed method is demonstrated by simulation results under balanced and unbalanced sag conditions.
    2012 7th International Power Electronics and Motion Control Conference (IPEMC); 01/2012
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The 54-meter-high Tvindkraft windmill was built by a group of volunteers during 1975-1978, as an argument for renewable energy sources as well as an argument against nuclear power. At that time it was the world's biggest windmill. So far, Tvindkraft has been running for 35 years, proving that a well-constructed wind turbine is a sustainable approach to renewable energy utilization. This paper deals with the analysis, simulation, implementation and experimental testing of a new 500 kW 21-IGBT-based frequency converter that will run in parallel with the former 12-Thyristor-based frequency converter to fully utilize the capacity of the windmill. Simulations and experimental results are presented side-by-side to verify the proper functionalities of the frequency converter described in this paper.
    International Conference on Renewable Energy Research and Applications (ICRERA, 2013); 10/2013

Full-text

View
24 Downloads
Available from