METHOD FOR OPERATING A WIND ENERGY SYSTEM IN CASE OF OVERVOLTAGE IN THE GRID

摘要

The invention relates to a method for operating a wind energy system (15-19) comprising an electrical generator (30) driven by a rotor (25-29) for outputting electrical power to an electrical grid (31) allowing for a grid voltage, wherein idle power from the wind energy system (15-19) is fed into the grid (31) if overvoltage is present in the grid (31) in order to reduce the voltage. The invention further relates to a wind energy system (15-19) comprising an electrical generator (30) driven by a rotor for outputting electrical power to an electrical grid (31), wherein idle power from the wind energy system (15-19) can be fed into the grid (31) if overvoltage is present in the grid in order to reduce the voltage. The method according to the invention is characterized in that it is monitored whether a voltage has been lowered to a prescribable target value within a prescribable time and/or idle current has been output that is greater than or equal to a prescribable idle current target value. The wind energy system according to the invention is characterized in that a monitoring device (50, 51) is provided, which is designed to monitor whether the voltage has been lowered to a prescribable target value within a prescribable time and/or idle current has been output that is greater than or equal to a prescribable idle current target value.