Abstract: A power generation system is provided. The power generation system including a power generation unit operable to supply electrical power to an utility system; a synchronous machine coupled to the utility system; a grid measurement device arranged for measuring the current and power that is exchanged between the synchronous machine and the utility system; a controller for adjusting the output power of the power generation unit as a function of the power and current that is measured by the grid measurement device; and a communication link between the grid measurement device, controller and/or the power generation unit. The power generation unit is configured to provide current and power to the utility system as a function of the power and current that is measured by the grid measurement device.

Abstract: A wind turbine system and method are provided. The wind turbine system includes a wind turbine operable to supply wind power to an utility system; a synchronous generator coupled to the utility system; a grid measurement device arranged for measuring the current and power that is exchanged between the synchronous generator and the utility system; a controller for adjusting the output power of the wind turbine as a function of the power and current that is measured by the grid measurement device; and a means of communication between the grid measurement device, controller and/or the wind turbine, wherein the wind turbine is configured to provide current and power to the utility system as a function of the measured power and current of the grid measurement device.

Abstract: A power interchange system for interchanging electric energy between a battery and an electric grid is provided The power interchange system includes a rectifier unit for converting alternating current of the electric grid into direct current for charging the battery; a grid measurement device for measuring an electric parameter of the electric grid, and a controller unit for adjusting the direct current for the charging the battery as a function of the electric parameter of the electric grid. Moreover a method for interchanging electric energy between a battery and an electric grid is provided.

Abstract: The invention relates to at least one wind turbine including a rotor mechanically coupled with a wind turbine generator for transforming mechanical power into electrical power, the generator comprising a generator output for putting out the electrical power, a wind farm output node being adapted to be electrically coupled with a utility grid, a converter comprising at least one electric motor with a stator and a rotor and a converter generator with a stator and a rotor the stator of the motor being electrically coupled with the generator output and the stator of the converter generator being electrically coupled with the wind farm output node and the rotor of the motor and the rotor of the converter generator being mechanically coupled with each other.