Wind Energy Unit

A wind energy unit connected to an electrical 3-phase AC network, comprising:

• a wind turbine;
• a generator having a rotor, a rotor winding and a rotor winding side converter connected to the wind turbine;
• and
• a generator regulation device that regulates the generator having
• a first and a second regulation unit that each operate on a rotor-winding side converter,
• wherein a network voltage analyzer connects to the electrical 3-phase AC network and determines whether a network fault has occurred if the network voltage sinor representation deviates from a predetermined set interval and if a network fault has occurred the first regulation unit is assigned to regulate a non-faulty 3-phase AC network and the second regulation unit is assigned to regulate the generator rotor winding.