Electrical power circuit and method of operating same

An electrical power circuit, comprising:

• a generator having a rotor and a stator;
• a power converter comprising a line-side converter electrically coupled to a power grid and a rotor-side converter electrically coupled to the generator the line-side converter electrically coupled to the rotor-side converter via a DC link;
• and,
• a controller communicatively coupled to at least one of the power converter and the generator, the controller configured to perform one or more operations, the operations comprising:
• operating rotor connections of the rotor of the generator in a wye configuration during a first rotor speed operating range, the first rotor speed operating range comprising rotor speeds equal to and above a synchronous speed of the generator;
• monitoring a rotor speed of the rotor of the generator;
• and,
• transitioning the rotor connections of the rotor from the wye configuration to a delta configuration if the rotor speed changes to a second rotor speed operating range, the second rotor speed operating range comprising rotor speeds below the synchronous speed of the generator,
• wherein transitioning from the wve configuration to the delta configuration and vice versa comprises rotor speed hysteresis to avoid excessive transitioning.