Article

Overview of different wind generator systems and their comparisons

Inst. of Energy Technol., Aalborg Univ., Aalborg
IET Renewable Power Generation (Impact Factor: 1.9). 07/2008; 2(2):123 - 138. 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.

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    • "In addition to this, VSWT can be controlled to minimize the stress on the tower structure, gears and wind generator (WG) shaft, since the blades absorb peaks of WT torque during the variation of the WG speed of rotation, leading to a longer installation life of WECS [18]. In VSWT system, the electric generators mostly fall into either synchronous generator or asynchronous generator [18] [24] [25], in which the prime mover and subsequently the rotor rotate at synchronous and super-synchronous speed respectively for generating mode. The Wound Rotor and Permanent Magnet type of generators are considered under synchronous generator and under asynchronous generator, the Squirrel Cage, Wound Rotor and Doubly Fed type of generators are considered. "
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