A method for the operation of a wind turbine generator system adapted to be switched into the mains, including a variable-speed rotor, a torque governor, and a governor for the angle of blade attack, characterized in that the speed of the rotor is regulated by varying the angle of attack before the wind turbine generator system is switched into the mains.
Description
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
The invention will be described in more detail below with reference to an embodiment and two figures.
FIG. 1 shows the characteristic of the generator speed n, angle of blade attack Φ, and torque M in a common graph as plotted above time t, by way of example
FIG. 2 depicts the regulation procedures required for the behaviour shown in FIG. 1, in a flow chart.
Claims
1. A method for the operation of a wind turbine generator system adapted to be switched into the mains, including a variable-speed rotor a torque governor, and a governor for the angle of blade attack, characterized in that the speed of the rotor is regulated by varying the angle of attack before the wind turbine generator system is switched into the mains.
2. The method according to claim 1, characterized in that speed control is performed to a synchronization speed nsync of the generator that is suited for the process of switching it into the mains.
3. The method according to claim 1, characterized in that speed control starts after a synchronization speed nsync is exceeded.
4. The method according to claim 1, characterized in that while the wind turbine generator system starts up the angle of blade attack is continuously reduced, proceeding from an maximum angle of blade attack, before speed control begins.
5. The method according to claim 4, characterized in that said decrease in the angle of blade attack is performed in dependence on speed.
6. The method according to claim 4, characterized in that the decrease in the angle of blade attack is carried out till a minimum angle Φstart of blade attack.
7. The method according to claim 1, characterized in that an angle Φstart of blade attack does not tall below a minimum before the system is switched into the mains.
8. The method according to claim 4, characterized in that the minimum angle Φstart of blade attack is dependent upon the wind speed.
9. The method according to claim 4, characterized in that the angle of blade attack falls below the minimum angle Φstart of blade attack after the system is switched into the mains.
10. The method according to claim 1, characterized in that the governor of the angle of blade attack and the torque governor are operated simultaneously after the switch-in procedure.
Patent Application
20070194574
