Abstract: A method for the determination of a control reserve of one or plural wind energy plants, for the operation of which a desired value for at least one electric variable is preset, and for which a control unit is provided which has a power curve, which contains a maximum value of the electric variable depending on values of the wind, the method having the following steps: the control unit determines a maximum value of the electric variable from the actual value of the wind and subtracts a current value of the electric variable from the same, the control unit transmits the determined maximum value and/or the difference as a control reserve to a higher order control unit and/or an external utility.

Abstract: A method for the operation of a wind park with a plurality of wind energy plants, which each one have one control unit at a time, which can control and/or adjust the wind energy plant in response to a received desired value for an electric variable, the method having the following steps: a higher order control calculates and/or receives a currently permitted maximum value for the electric variable which the wind park is allowed to provide, the higher order control determines a desired value for the electric variable for each wind energy plant and forwards the same to the wind energy plants, characterised in that the higher order control determines the desired value for each one of the wind energy plants depending on the currently maximum and/or minimum available values of all the wind energy plants.

Abstract: The present invention is related to a method for determining a characteristic curve (9) for an electric variable (Pel, Q, ?, cos ?, IP, IQ) of a wind energy plant (1). According to the present invention, it is provided that at least one characteristic value of the electric variable (Pel, Q, ?, cos ?, IP, IQ) is measured for at least one value of the wind (vW), and for the at least one value of the wind (vW), a characteristic value of the electric variable (Pel, Q, ?, cos ?, IP, IQ) is adapted from a predetermined characteristic curve (7) containing characteristic values of the electric variable (Pel, Q, ?, cos ?, IP, IQ) as a function of different values of the wind (vW), taking into account the characteristic value measured for the at least one value of the wind (vW). Besides to this, the present invention is also related to a corresponding apparatus. FIG. 2 is provided for the abstract.

Abstract: A method for the operation of a wind farm with a multiplicity of wind energy plants, which are connected to a wind farm control unit, wherein each wind energy plant can perform a power reduction for purposes of maintenance or examination, characterised in that each one of the wind energy plants can perform the power reduction in response to a signal of the wind farm control unit, and the wind farm control unit co-ordinates the signals for the wind energy plants such that a power decrease of the wind farm does not exceed a predetermined amount and/or a provided power of the wind farm does not exceed a predetermined velocity of change, and that at all times at least one wind energy plant is not affected by the power reduction.

Abstract: A method and apparatus for operating a wind energy plant with a rotor blade control, a torque control and a control unit. A power limited mode of operation presets a desired value for the fed power, which is smaller than the rated value for the plant. On a threshold rotational speed, the torque is lowered through the torque control such that the preset desired value for the power is not exceeded. The threshold rotational speed, depending on the preset desired value for the moment (Mdesired), is set to a value smaller than the rated value for the rotational speed.

Abstract: A wind park with a plurality of wind energy plants, which each have one plant control, which presets a desired value for the active power to its wind energy plant, and with a park control, which presets a desired value for the active power to be generated for each plant control and limits the active power fed by the wind park to a preset value, by shutting down a first group of wind energy plants and presetting a desired value for the active power to a second group of wind energy plants at a time, characterised in that the park control starts the wind energy plants of the first group again when the sum of the actual values of the active power of the wind energy plants of the second group has reached the preset desired value and/or a predetermined time duration has elapsed.

Abstract: Method for the operation of a wind power plant with controllable effective power, wherein an idle power interval defined by a minimum idle power and a maximum idle power is assigned to each value of the effective power and the actual idle power can be controlled within this interval, characterized in that the effective power is reduced when a target idle power lies outside of the idle power interval assigned to the current effective power.