Patent ID: 8631275

Claim:
A controller arrangement of an electrical power transfer system of a wind turbine, wherein the wind turbine comprises an electrical generator and is connected to an electrical power grid, wherein the power transfer system is arranged to transfer electrical power from the generator to the grid; wherein the power transfer system comprises at least two electrical power converters and at least two converter controllers; wherein the at least two electrical power converters are electrically connected in parallel providing at least two power paths of the power transfer system, and both of the at least two power paths are arranged to transport electrical energy from the electrical generator to the electrical power grid in a normal operation mode of the electrical power transfer system; wherein the at least two converter controllers are each arranged to control one of the at least two electrical power converters as well as at least two of the electrical power converters; wherein the controller arrangement enables a first one of the at least two electrical power converters to be controlled by a first one of the at least two converter controllers and a second one of the at least two electrical power converters to be controlled by a second one of the at least two converter controllers, as well as the first and the second electrical power converters to be controlled by the first converter controller while the first or the second electrical power converter is not controlled by the second converter controller; and wherein the electrical generator is divided into a plurality of generator segments, which produce a plurality of independent AC power outputs and represent separate power sources, wherein at least two of the electrical power converters are coupled to different power sources.