METHOD AND WIND TURBINE FOR FEEDING ELECTRIC POWER

A method for feeding electrical power into an electrical supply grid by means of at least one wind power installation or of a wind farm having a plurality of wind power installations at a grid connection point, wherein a plurality of energy generators feed power into the electrical supply grid and a plurality of consumers draw power from the electrical supply grid so that a power balance between the infed power and the drawn power results in the electrical supply grid, which power balance is positive when more power is fed in than drawn, and the method comprises the following steps: monitoring of a power indicator that is representative of the power balance in the electrical supply grid, determination of an amount of balancing energy depending on the power indicator, infeed of a basic electrical power depending on the available wind power, and changing of the infeed of the basic electrical power by the determined amount of balancing energy.