Patent ID: 7595563
Filing Date: 2009-09-29
Classification: F03D,F05B,H02J,H02P,Y02E

Abstract:
1. A method of operating a wind power installation comprising an electric generator drivable by a rotor for supplying electrical power to an electrical network, in particular its connected consumers, characterised in that the power supplied to the network by the generator is regulated in dependence on an electrical voltage applied to the network, that the wind power installation remains connected with the grid even if the electrical voltage applied to the network is below U min and/or above U max , whereby U min is a voltage level below the reference value of the electrical voltage applied to the network, whereby U max is a voltage level which is above the reference value of the electrical voltage applied to the network, that the wind power installation is feeding its maximum power to the grid if the voltage is between a further value U 3 and U 1 , whereby the voltage level of U 3 is bigger than the voltage level of U min but smaller than of U 1 and whereby the voltage level of U 1 is smaller than the voltage level of U max but greater than of U 3 (see FIG. 3 ) and that the wind power installation is reducing its power output fed to the network if the voltage applied to the grid is in the region between U 1 and U max on the one side and/or between U min and U 3 on the other side.