METHOD AND SYSTEM FOR THE PROTECTION OF AN ELECTRICITY GENERATION FACILITY CONNECTED TO AN ELECTRICITY NETWORK IN THE PRESENCE OF VOLTAGE SAGS IN SAID NETWORK

摘要

Method and system for the protection of an electricity generation facility, of those which comprise a wind generator connected to an electricity network, in the presence of voltage sags in the network, the wind generator comprising a double-fed asynchronous generator formed by two windings, a winding in the rotor and a winding in the stator, of the type where, the rotor winding is connected to a rectifying-conversion circuit. The current generated in the asynchronous generator rotor is obliged to pass through an impedance connected in series to the rotor, which is designed to limit the overcurrents and overvoltages in connectors of the rectifying-conversion circuit.