Patent ID: 7218014
Filing Date: 2007-05-15
Classification: F03D,H02J,H02M,Y02E

Abstract:
1. A wind energy system comprising at least two generators which are driven by means of wind rotors, a rectifier unit for each generator, to whose inputs the associated generator is connected, an energy storage circuit for each rectifier unit, with the energy storage circuit being connected to the outputs of the associated rectifier unit, a first busbar system, to which the energy storage circuits are connected in parallel, a transmission system, which is connected to the first busbar system, a network coupling device, to which the transmission system is connected on the input side, with the network coupling device being coupled via a network transformer to an electrical AC voltage supply network, wherein each rectifier unit is in the form of an active rectifier unit with drivable power semiconductor components, in that each energy storage circuit has at least one DC voltage capacitance, in that, in at least one connection for the first busbar system, each energy storage circuit has at least one first protection switch in the form of a semiconductor switch, wherein the network coupling device is connected via a second busbar system to the transmission system, wherein the network coupling device has at least one inverter, and in each case one input circuit for each inverter, and in that, if a number of inverters is greater than or equal to two, the input circuits are connected in parallel to the second busbar system, and wherein, in at least one connection for the second busbar system, each input circuit has at least one second protection switch in the form of a semiconductor switch.