A method for controlling a cluster of wind turbines connected to a utility grid includes the steps of determining the frequency of the utility grid, detecting a frequency deviation in the utility grid, and disconnecting the wind turbines at different predefined frequency values above the nominal frequency value. After receiving game information from game participant clients, the title server determines whether the broadcast the game session to spectators, analyzes and repackages the received telemetry data, optionally embedding additional data, and rebroadcasts the repackaged telemetry as a spectator feed to non-participant spectator client devices for viewing by users of the spectator client devices. The display module separates a left-eye image and a right-eye image to display a stereoscopic image. Transfer and pick-up of the preforms can be accomplished using a multi-function, multi-axis robot that supports take-out tubes and suction pads. One metal body is electronically connected to one group of connecting terminals. An antenna can thus retract and extend within the sleeve of the unsealed compartment while the RF connection remains intact due to the interconnect provided between the bushing assembly and the sealed housing.