Patent ID: 7638984

Claim:
A method for the operation of a wind energy plant in which a reactive electric variable (Q) reacts to voltage changes, the wind energy plant having a desired value of the grid voltage (U N ) and a real value of the grid voltage (U), comprising: defining a first upper limit value of the grid voltage (U 1 ) and/or a first lower limit value of the grid voltage (U 3 ); adjusting the reactive electric variable (Q) when the real value of the grid voltage (U) exceeds the first upper limit value of the grid voltage (U 1 ), and/or falls below the first lower limit value of the grid voltage (U 3 ) such that the deviation of the real value of the grid voltage (U) from the desired value of the grid voltage (U N ) is counter-acted, characterised in that the desired value of the reactive electric variable (Q) is continuously increased or decreased further over time as long as the real value of the grid voltage (U) exceeds the first upper limit value of the grid voltage (U 1 ) or falls below the first lower limit value of the grid voltage (U 3 ).