| Abstract |
In principle the variable speed wind energy converters offer the technical possibilities to reduce thecumulative load in the drive train and the influence on the electrical grid. The short time wind powerfluctuations on the wind rotor can be smoothed by utilisation of rotating masses as storage of kineticenergy. This requires a special designed automatic control and system management, which minimiseselectric power fluctuation at maximum energy yield.Based on the named goals, a new control approach (fig. 2) has been conceived. These aims are achievedon base of stochastic dynamic optimisation algorithms. The new control approach considers the dynamicof the actual wind speed on the given location via a weight function on one hand and produces a directaction on the cumulative load for the plant´s drive train and the time dependent run of the electricalpower output curve by the formulation of quality functions on the other hand.The approach was tested with help of simulation and test plant, in which a variable speed wind energyconverter with the nominal power of 22 kVA is modulated under consideration of the separate systempart´s non-linear nature. The results of the new control approach are compared to conventional controlmethods. |
