Method for operating a wind turbine

摘要

595162 A method of operating a wind power installation is disclosed. The wind power installation is connected to an electrical supply network and in operation feeds electrical energy into the supply network when the wind is above an initial speed and below a switch-off speed and more specifically with the frequency and voltage desired or required by the supply network. In operation of the wind power installation above a rated value or below the switch off speed the rotor of the wind power installation that has at least one rotor blade rotates and connected to the rotor of the wind power installation is a generator driven by the rotor thereby to generate electrical energy. The wind power installation has means for measuring the frequency prevailing in the electrical supply network and said means for measuring the network frequency are connected to a control device for controlling operation of the wind power installation. The power delivered by the generator of the wind power installation to the network is increased quickly and for a short period above the currently prevailing power of the wind power installation if the network frequency of the electrical network is below the desired target frequency of the network by a predetermined frequency value and/or if the network frequency falls with a frequency gradient, namely with a change in relation to time, the amount of which exceeds a predetermined amount of change.