| 摘要 |
The present invention relates to a method for operating a wind turbine connected to a power grid for generating electric energy when a change in the grid voltage occurs, and to a wind turbine for carrying out the method. According to the method, when a deviation of a grid voltage from a certain regular grid voltage range occurs, the current residual grid voltage is measured, the current wind speed is measured, depending on the value of the residual grid voltage a certain time period is defined starting with the detection of the change in grid voltage, and the wind turbine is operated within the defined time period, depending on the value of the residual grid voltage, in a certain operating mode that deviates from regular operation with respect to the effective power, and the wind turbine is operated again in the regular operating mode after the grid voltage has normalized again within the defined time period, or is shut off at the end of the time period if the deviation of the grid voltage persists during the defined time period. According to the invention, voltage ranges are defined for grid voltage values that are not part of the regular grid voltage range, wherein each defined voltage range is associated with a plurality of voltage values and at least one first factor, which is different for each voltage range, for controlling the wind turbine so as to implement the operating mode deviating from the regular operating mode and, depending on the measured wind speed, one of the first factors for controlling the wind turbine is used to implement the deviating operating mode. |
