Patent ID: 7939954

Claim:
A control and protection system in the event of symmetrical and asymmetrical faults, for a doubly fed asynchronous generator having a stator connected to a power grid, the system comprising: a three-phase inverter; an intermediate converter circuit formed by a DC BUS and which serves to couple the inverter with; a three phase rectifier; a crowbar; a controller block for maintaining control of the generator during symmetrical and asymmetrical faults and for preventing the generator from being disconnected from the power grid; and a central control unit including programmed control means comprising two power loops which in turn include two current loops, each of the power loops including a power regulator, and each of the current loops including a current regulator; wherein the programmed control means generates voltage setpoints to be imposed on a rotor of the generator to dampen current oscillations caused by the faults, the voltage setpoints being based on outputs of the current regulators and a proportional inverse magnetization current.