| Abstract |
With the increasing nominal power of the plants and the cumulated wind park power, interest
in the operating behaviour of the plants and finally of the wind park is developing. Main criteria for the
quality of the operating behaviour is based on mains pollution (e.g. harmonics) caused by the wind
energy converter itself and by the power fluctuation through the variations in the wind speed. The
dynamic and stationary operating behaviour of wind energy converters is on the one hand defined by the
structure of the drive train, and on the other hand by the control algorithm. The essence of this paper is
the investigation of the operating behaviour of different concepts of wind energy converters in relation
to different control algorithms. From the theoretical perspective, several different concepts with
synchronous and asynchronous machines combined with low- and medium-voltage converters for
variable speed generation are possible. Because of the experiences so far, there are, in practice, only a
few concepts suitable for electrical part design. Therefore, in the presented paper, a theoretical and
simulated based comparison will be carried out. Five different concepts (some state-of-the-art and some
new creations especially for off-shore use) therefore, are compared in relation to necessary requirements. |
