A method for operating an electrical machine, said method comprising: coupling the electrical machine to an electric power system such that the electric power system is configured to transmit at least one phase of electric power to the electrical machine; and configuring the electrical machine such that the electrical machine remains electrically connected to the electric power system during and subsequent to a voltage amplitude of the electric power system operating outside of a predetermined range for an undetermined period of time, said configuring the electrical machine comprising: electrically coupling at least a portion of a control system to at least a portion of the electric power system; coupling the control system in electronic data communication with at least a portion of the electrical machine; and configuring the electrical machine and the control system such that the electrical machine remains electrically connected to the electric power system during and subsequent to the voltage amplitude of the electric power system decreasing below the predetermined range including approximately zero volts for the undetermined period of time, thereby facilitating zero voltage ride through (ZRVT). view more

An apparatus, comprising: A base frame for the arrangement of a drive train, which is driven by a wind-driven rotor of a wind power plant, on the tower of the wind power plant on which the base frame is affixed with an essentially horizontal orientation of the rotor axis so that it can rotate azimuthally around the essentially vertical axis of the tower and is constructed from a discrete upper part that carries the drive train and a discrete lower part that has an azimuthal drive device that is attachably joined with the upper part at a connection point, wherein the lower part provides for azimuthal rotation around the essentially vertical axis of the tower, wherein the connection point extends along an essentially horizontal cross-section that has a larger dimension in the direction of the rotor axis than in the direction perpendicular to that. view more

The apparatus according to one of the claims 1, 2 or 3, wherein, on the upper part, two supports that extend away from its end that faces away from the rotor essentially in the direction of the rotor axis are arranged, on which at least one generator of the wind power plant can be supported. view more