System and method for detecting a stator distortion filter in an electrical power system

An electrical power system connected to a power grid, the electrical power system comprising:

• a generator comprising a stator and a rotor, the stator connected to the power grid via a stator power path;
• a passive load connected to the generator;
• a power converter comprising a line-side converter coupled to the power grid via a converter power path and a rotor-side converter coupled to a rotor bus of the rotor and the line-side converter via a DC link;
• a controller comprising at least one processor, the at least one processor configured to perform a plurality of operations, the plurality of operations comprising:
• temporarily interrupting magnetic flux excitation of the generator;
• observing a sinusoidal waveform of one or more electrical feedbacks of the generator;
• when the sinusoidal waveform persists longer than a predefined duration, determining that the passive load is connected to the generator of the electrical power system;
• when the sinusoidal waveform abruptly decays below a threshold in a time period less than the predefined duration, determining that the passive load is not connected to the generator of the electrical power system;
• and
• implementing a control action based on whether the passive load is connected to the generator of the electrical power system.